/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/loops-crafted-1/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:25:01,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:25:01,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:25:01,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:25:01,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:25:01,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:25:01,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:25:01,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:25:01,489 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:25:01,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:25:01,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:25:01,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:25:01,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:25:01,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:25:01,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:25:01,492 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:25:01,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:25:01,493 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:25:01,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:25:01,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:25:01,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:25:01,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:25:01,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:25:01,686 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:25:01,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-04-06 20:25:01,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3684275e6/361a398d69214e0491ce63d793c07d5b/FLAG9ad8e8901 [2022-04-06 20:25:02,093 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:25:02,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-04-06 20:25:02,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3684275e6/361a398d69214e0491ce63d793c07d5b/FLAG9ad8e8901 [2022-04-06 20:25:02,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3684275e6/361a398d69214e0491ce63d793c07d5b [2022-04-06 20:25:02,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:25:02,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:25:02,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:25:02,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:25:02,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:25:02,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,539 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72cbcb34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02, skipping insertion in model container [2022-04-06 20:25:02,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:25:02,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:25:02,649 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c[311,324] [2022-04-06 20:25:02,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:25:02,672 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:25:02,679 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c[311,324] [2022-04-06 20:25:02,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:25:02,688 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:25:02,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02 WrapperNode [2022-04-06 20:25:02,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:25:02,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:25:02,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:25:02,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:25:02,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:25:02,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:25:02,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:25:02,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:25:02,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (1/1) ... [2022-04-06 20:25:02,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:25:02,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:02,756 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) [2022-04-06 20:25:02,785 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 [2022-04-06 20:25:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:25:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:25:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:25:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:25:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:25:02,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:25:02,847 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:25:02,849 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:25:02,966 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:25:02,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:25:02,972 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:25:02,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:25:02 BoogieIcfgContainer [2022-04-06 20:25:02,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:25:02,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:25:02,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:25:03,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:25:03,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:25:02" (1/3) ... [2022-04-06 20:25:03,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de6f373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:25:03, skipping insertion in model container [2022-04-06 20:25:03,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:25:02" (2/3) ... [2022-04-06 20:25:03,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de6f373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:25:03, skipping insertion in model container [2022-04-06 20:25:03,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:25:02" (3/3) ... [2022-04-06 20:25:03,017 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2022-04-06 20:25:03,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:25:03,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:25:03,085 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:25:03,090 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 [2022-04-06 20:25:03,090 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:25:03,116 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:25:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:25:03,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:03,122 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:03,122 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:03,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 1 times [2022-04-06 20:25:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164947456] [2022-04-06 20:25:03,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:25:03,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1326077006, now seen corresponding path program 2 times [2022-04-06 20:25:03,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:03,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578675453] [2022-04-06 20:25:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:03,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578675453] [2022-04-06 20:25:03,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578675453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:03,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:03,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:25:03,291 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:03,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164947456] [2022-04-06 20:25:03,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164947456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:03,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:03,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:25:03,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312372603] [2022-04-06 20:25:03,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:03,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:25:03,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:25:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:25:03,323 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:03,363 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:25:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:25:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:25:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:03,375 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:25:03,376 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:25:03,378 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 [2022-04-06 20:25:03,381 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:03,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:25:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:25:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 20:25:03,410 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 20:25:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:03,410 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 20:25:03,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 20:25:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:25:03,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:03,411 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:03,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:25:03,412 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-04-06 20:25:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1927231897] [2022-04-06 20:25:03,414 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:25:03,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-04-06 20:25:03,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:03,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948160584] [2022-04-06 20:25:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948160584] [2022-04-06 20:25:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948160584] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:03,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:03,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:25:03,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:03,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1927231897] [2022-04-06 20:25:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1927231897] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:03,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:03,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:25:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566066391] [2022-04-06 20:25:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:03,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:25:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:25:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:25:03,498 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:03,541 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-06 20:25:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:25:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:25:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:03,542 INFO L225 Difference]: With dead ends: 25 [2022-04-06 20:25:03,543 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:25:03,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:25:03,545 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:03,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:03,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:25:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-06 20:25:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-06 20:25:03,559 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-04-06 20:25:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:03,560 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-06 20:25:03,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-06 20:25:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:25:03,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:03,560 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:03,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:25:03,561 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:03,561 INFO L85 PathProgramCache]: Analyzing trace with hash 644646283, now seen corresponding path program 1 times [2022-04-06 20:25:03,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1663155776] [2022-04-06 20:25:03,574 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:03,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 644646283, now seen corresponding path program 2 times [2022-04-06 20:25:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:03,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051246853] [2022-04-06 20:25:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:03,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:03,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051246853] [2022-04-06 20:25:03,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051246853] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:03,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839776584] [2022-04-06 20:25:03,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:03,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:03,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:03,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:25:03,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:25:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:03,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839776584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:04,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:04,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2022-04-06 20:25:04,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1663155776] [2022-04-06 20:25:04,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1663155776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:04,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:25:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138170785] [2022-04-06 20:25:04,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:04,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:25:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:25:04,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:25:04,034 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:04,073 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:25:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:25:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:25:04,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:04,074 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:25:04,074 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:25:04,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:25:04,075 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:04,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 24 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:25:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 20:25:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 20:25:04,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-04-06 20:25:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:04,079 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 20:25:04,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 20:25:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:25:04,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:04,080 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:04,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:04,296 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:04,297 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 148462787, now seen corresponding path program 3 times [2022-04-06 20:25:04,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485312318] [2022-04-06 20:25:04,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:04,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 148462787, now seen corresponding path program 4 times [2022-04-06 20:25:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:04,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457150702] [2022-04-06 20:25:04,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:04,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:04,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457150702] [2022-04-06 20:25:04,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457150702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338953397] [2022-04-06 20:25:04,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:04,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:04,361 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:25:04,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:04,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:04,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:25:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:04,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338953397] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:04,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 19 [2022-04-06 20:25:04,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485312318] [2022-04-06 20:25:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485312318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:04,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:25:04,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72894278] [2022-04-06 20:25:04,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:04,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:25:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:25:04,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:25:04,659 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:04,742 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:25:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:25:04,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:25:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:04,743 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:25:04,743 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:25:04,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:25:04,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:04,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:25:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:25:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 20:25:04,757 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-04-06 20:25:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:04,758 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 20:25:04,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:04,758 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 20:25:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:25:04,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:04,758 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:04,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:04,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 20:25:04,971 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:04,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:04,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1623366283, now seen corresponding path program 5 times [2022-04-06 20:25:04,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:04,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310944324] [2022-04-06 20:25:04,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:04,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1623366283, now seen corresponding path program 6 times [2022-04-06 20:25:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106192680] [2022-04-06 20:25:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:05,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106192680] [2022-04-06 20:25:05,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106192680] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:05,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940665123] [2022-04-06 20:25:05,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:05,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:05,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:05,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:05,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:25:05,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:25:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:05,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:25:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:25:05,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:25:05,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940665123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:05,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:25:05,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-04-06 20:25:05,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:05,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310944324] [2022-04-06 20:25:05,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310944324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:05,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:05,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:25:05,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880096106] [2022-04-06 20:25:05,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:05,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:25:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:05,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:25:05,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:25:05,139 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:05,175 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2022-04-06 20:25:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:25:05,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:25:05,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:05,177 INFO L225 Difference]: With dead ends: 32 [2022-04-06 20:25:05,177 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:25:05,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:25:05,178 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:05,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 29 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:25:05,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-04-06 20:25:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 20:25:05,195 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-04-06 20:25:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:05,195 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 20:25:05,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 20:25:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:25:05,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:05,195 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:05,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 20:25:05,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:05,413 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:05,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:05,413 INFO L85 PathProgramCache]: Analyzing trace with hash 438017605, now seen corresponding path program 1 times [2022-04-06 20:25:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:05,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [349304932] [2022-04-06 20:25:05,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:05,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 438017605, now seen corresponding path program 2 times [2022-04-06 20:25:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072886870] [2022-04-06 20:25:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:05,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072886870] [2022-04-06 20:25:05,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072886870] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:05,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956094317] [2022-04-06 20:25:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:05,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:05,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:05,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:25:05,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:25:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:05,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:05,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956094317] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:05,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:05,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-04-06 20:25:05,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:05,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [349304932] [2022-04-06 20:25:05,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [349304932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:05,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:05,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:25:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115907684] [2022-04-06 20:25:05,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:05,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:25:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:25:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:25:05,703 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:05,787 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 20:25:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:25:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:25:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:05,789 INFO L225 Difference]: With dead ends: 38 [2022-04-06 20:25:05,789 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:25:05,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:25:05,790 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:05,790 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:25:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 20:25:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 20:25:05,795 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2022-04-06 20:25:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:05,795 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 20:25:05,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 20:25:05,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:25:05,796 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:05,796 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:05,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:06,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:06,012 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1329686029, now seen corresponding path program 3 times [2022-04-06 20:25:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:06,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1642921036] [2022-04-06 20:25:06,014 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:06,014 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:06,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1329686029, now seen corresponding path program 4 times [2022-04-06 20:25:06,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:06,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127706046] [2022-04-06 20:25:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:06,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:06,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127706046] [2022-04-06 20:25:06,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127706046] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:06,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494406684] [2022-04-06 20:25:06,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:06,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:06,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:06,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:06,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:25:06,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:06,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:25:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:06,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:06,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494406684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:06,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:06,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-04-06 20:25:06,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:06,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1642921036] [2022-04-06 20:25:06,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1642921036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:06,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:06,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:25:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253529358] [2022-04-06 20:25:06,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:06,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:25:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:06,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:25:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:25:06,357 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:06,466 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-04-06 20:25:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:25:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-04-06 20:25:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:06,467 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:25:06,467 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 20:25:06,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:25:06,468 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:06,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:25:06,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 20:25:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 20:25:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 20:25:06,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2022-04-06 20:25:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:06,477 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 20:25:06,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 20:25:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:25:06,477 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:06,477 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:06,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:06,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:06,691 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash 650979653, now seen corresponding path program 5 times [2022-04-06 20:25:06,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:06,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752089534] [2022-04-06 20:25:06,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:06,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 650979653, now seen corresponding path program 6 times [2022-04-06 20:25:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:06,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225115048] [2022-04-06 20:25:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:06,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:06,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225115048] [2022-04-06 20:25:06,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225115048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:06,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690003324] [2022-04-06 20:25:06,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:06,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:06,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:06,780 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:06,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:25:06,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 20:25:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:25:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:25:06,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:25:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690003324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:07,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:07,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-04-06 20:25:07,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:07,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752089534] [2022-04-06 20:25:07,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752089534] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:07,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:07,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:25:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71444034] [2022-04-06 20:25:07,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:07,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:25:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:25:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:25:07,066 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:07,191 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-04-06 20:25:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:25:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:25:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:07,192 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:25:07,192 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:25:07,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:25:07,193 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:07,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:25:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 20:25:07,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-04-06 20:25:07,199 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2022-04-06 20:25:07,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:07,199 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-04-06 20:25:07,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-04-06 20:25:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:25:07,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:07,200 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:07,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:07,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:07,419 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:07,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2015361805, now seen corresponding path program 7 times [2022-04-06 20:25:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:07,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309357047] [2022-04-06 20:25:07,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:07,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2015361805, now seen corresponding path program 8 times [2022-04-06 20:25:07,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:07,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816206886] [2022-04-06 20:25:07,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:07,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:07,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:07,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816206886] [2022-04-06 20:25:07,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816206886] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:07,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756901751] [2022-04-06 20:25:07,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:07,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:07,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:07,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:07,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:25:07,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:25:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:07,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756901751] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:07,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:07,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-04-06 20:25:07,873 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309357047] [2022-04-06 20:25:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309357047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:07,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:07,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:25:07,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935129218] [2022-04-06 20:25:07,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:07,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:25:07,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:07,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:25:07,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:25:07,874 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:08,050 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-04-06 20:25:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:25:08,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 20:25:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:08,051 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:25:08,051 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:25:08,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:25:08,052 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:08,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:25:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-06 20:25:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 20:25:08,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-04-06 20:25:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:08,072 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 20:25:08,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 20:25:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:25:08,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:08,072 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:08,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:08,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:08,287 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 753562693, now seen corresponding path program 9 times [2022-04-06 20:25:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838144444] [2022-04-06 20:25:08,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:08,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:08,289 INFO L85 PathProgramCache]: Analyzing trace with hash 753562693, now seen corresponding path program 10 times [2022-04-06 20:25:08,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:08,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397730317] [2022-04-06 20:25:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:08,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:08,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:08,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397730317] [2022-04-06 20:25:08,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397730317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397481319] [2022-04-06 20:25:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:08,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:08,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:25:08,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:08,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 20:25:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:08,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:08,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397481319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:08,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:08,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-04-06 20:25:08,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838144444] [2022-04-06 20:25:08,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838144444] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:08,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:08,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:25:08,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099116024] [2022-04-06 20:25:08,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:08,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:25:08,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:25:08,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:25:08,859 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:09,094 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-04-06 20:25:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:25:09,095 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:25:09,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:09,096 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:25:09,096 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:25:09,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:25:09,097 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:09,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 49 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:25:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 20:25:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 20:25:09,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2022-04-06 20:25:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:09,105 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 20:25:09,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 20:25:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:25:09,106 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:09,106 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:09,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:09,306 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:25:09,307 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:09,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:09,307 INFO L85 PathProgramCache]: Analyzing trace with hash 49991693, now seen corresponding path program 11 times [2022-04-06 20:25:09,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:09,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840200063] [2022-04-06 20:25:09,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:09,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 49991693, now seen corresponding path program 12 times [2022-04-06 20:25:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550138462] [2022-04-06 20:25:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:09,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:09,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:09,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550138462] [2022-04-06 20:25:09,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550138462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:09,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806059241] [2022-04-06 20:25:09,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:09,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:09,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:09,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:25:09,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:09,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:09,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:09,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 20:25:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 20:25:09,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806059241] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:09,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:09,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5, 5] total 18 [2022-04-06 20:25:09,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:09,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840200063] [2022-04-06 20:25:09,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840200063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:09,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:09,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:25:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651581649] [2022-04-06 20:25:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:09,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:25:09,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:09,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:25:09,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:25:09,699 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:09,882 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-04-06 20:25:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:25:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-06 20:25:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:09,883 INFO L225 Difference]: With dead ends: 53 [2022-04-06 20:25:09,883 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:25:09,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:25:09,884 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:09,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:25:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 20:25:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 20:25:09,900 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2022-04-06 20:25:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:09,900 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 20:25:09,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 20:25:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:25:09,901 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:09,901 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:09,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 20:25:10,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:10,115 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -593264827, now seen corresponding path program 13 times [2022-04-06 20:25:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682870990] [2022-04-06 20:25:10,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:10,117 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash -593264827, now seen corresponding path program 14 times [2022-04-06 20:25:10,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:10,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53674980] [2022-04-06 20:25:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:10,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:10,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53674980] [2022-04-06 20:25:10,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53674980] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179774625] [2022-04-06 20:25:10,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:10,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:10,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:10,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:25:10,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:10,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:10,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:25:10,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:10,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179774625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:10,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:10,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-04-06 20:25:10,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:10,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682870990] [2022-04-06 20:25:10,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682870990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:10,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:10,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:25:10,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909932389] [2022-04-06 20:25:10,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:10,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:25:10,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:10,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:25:10,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 20:25:10,798 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:11,122 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-04-06 20:25:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:25:11,123 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:25:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:11,124 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:25:11,124 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:25:11,124 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:25:11,125 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:11,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:25:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:25:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 20:25:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-04-06 20:25:11,138 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-04-06 20:25:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:11,138 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-04-06 20:25:11,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-04-06 20:25:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:25:11,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:11,139 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:11,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:11,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:25:11,355 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:11,355 INFO L85 PathProgramCache]: Analyzing trace with hash 295822605, now seen corresponding path program 15 times [2022-04-06 20:25:11,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:11,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [88136852] [2022-04-06 20:25:11,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:11,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash 295822605, now seen corresponding path program 16 times [2022-04-06 20:25:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481026225] [2022-04-06 20:25:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:11,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:11,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:11,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481026225] [2022-04-06 20:25:11,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481026225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:11,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682789949] [2022-04-06 20:25:11,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:11,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:11,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:11,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:11,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:25:11,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:11,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 20:25:11,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:11,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:12,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682789949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:12,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:12,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 38 [2022-04-06 20:25:12,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [88136852] [2022-04-06 20:25:12,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [88136852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:12,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:12,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:25:12,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148793133] [2022-04-06 20:25:12,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:12,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:25:12,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:12,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:25:12,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:25:12,138 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:12,484 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-06 20:25:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:25:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:25:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:12,485 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:25:12,485 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:25:12,486 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=2086, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:25:12,487 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:12,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 64 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:12,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:25:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 20:25:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 20:25:12,494 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-04-06 20:25:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:12,494 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 20:25:12,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 20:25:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:25:12,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:12,495 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:12,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:12,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:25:12,713 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:12,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:12,714 INFO L85 PathProgramCache]: Analyzing trace with hash 36194885, now seen corresponding path program 17 times [2022-04-06 20:25:12,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:12,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099788259] [2022-04-06 20:25:12,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:12,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash 36194885, now seen corresponding path program 18 times [2022-04-06 20:25:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:12,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040737810] [2022-04-06 20:25:12,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:12,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:12,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040737810] [2022-04-06 20:25:12,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040737810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718420282] [2022-04-06 20:25:12,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:12,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:12,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:25:12,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:12,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:12,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:12,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:25:12,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-04-06 20:25:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718420282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:13,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:13,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 21 [2022-04-06 20:25:13,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:13,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099788259] [2022-04-06 20:25:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099788259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:13,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:13,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:25:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015050584] [2022-04-06 20:25:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:13,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:25:13,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:25:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:25:13,109 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:13,384 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-04-06 20:25:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:25:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:25:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:13,385 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:25:13,385 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:25:13,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:25:13,385 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:13,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 29 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:25:13,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 20:25:13,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:13,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-04-06 20:25:13,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2022-04-06 20:25:13,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:13,392 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-04-06 20:25:13,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:13,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-04-06 20:25:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:25:13,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:13,393 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:13,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:13,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:25:13,609 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash 702888461, now seen corresponding path program 19 times [2022-04-06 20:25:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:13,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1827774886] [2022-04-06 20:25:13,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:13,611 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash 702888461, now seen corresponding path program 20 times [2022-04-06 20:25:13,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:13,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773844949] [2022-04-06 20:25:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773844949] [2022-04-06 20:25:13,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773844949] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:13,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681661361] [2022-04-06 20:25:13,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:13,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:13,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:13,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:25:13,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:13,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:25:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:14,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:14,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681661361] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:14,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-04-06 20:25:14,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1827774886] [2022-04-06 20:25:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1827774886] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:14,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:14,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:25:14,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999780568] [2022-04-06 20:25:14,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:14,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:25:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:25:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1628, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:25:14,621 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:15,085 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-04-06 20:25:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:25:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:25:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:15,086 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:25:15,086 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:25:15,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=340, Invalid=2852, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:25:15,087 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:15,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 59 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:25:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 20:25:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 20:25:15,094 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-04-06 20:25:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:15,094 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 20:25:15,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 20:25:15,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:25:15,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:15,095 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:15,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:15,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:25:15,305 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2052532923, now seen corresponding path program 21 times [2022-04-06 20:25:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:15,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942053863] [2022-04-06 20:25:15,307 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:15,307 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2052532923, now seen corresponding path program 22 times [2022-04-06 20:25:15,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:15,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559960799] [2022-04-06 20:25:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:15,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:15,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559960799] [2022-04-06 20:25:15,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559960799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:15,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122153724] [2022-04-06 20:25:15,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:15,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:15,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:15,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:25:15,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:15,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 20:25:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:16,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122153724] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:16,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:16,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 47 [2022-04-06 20:25:16,331 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942053863] [2022-04-06 20:25:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942053863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:16,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:16,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:25:16,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487449611] [2022-04-06 20:25:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:16,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:25:16,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:16,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:25:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:25:16,333 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:16,838 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-04-06 20:25:16,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:25:16,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:25:16,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:16,839 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:25:16,839 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:25:16,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=3280, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:25:16,840 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:16,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 54 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:25:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 20:25:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-04-06 20:25:16,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-04-06 20:25:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:16,847 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-04-06 20:25:16,847 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-04-06 20:25:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:25:16,848 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:16,848 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:16,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:17,063 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:17,064 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 898944781, now seen corresponding path program 23 times [2022-04-06 20:25:17,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:17,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454896855] [2022-04-06 20:25:17,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:17,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:17,065 INFO L85 PathProgramCache]: Analyzing trace with hash 898944781, now seen corresponding path program 24 times [2022-04-06 20:25:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:17,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012590611] [2022-04-06 20:25:17,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:17,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:17,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:17,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012590611] [2022-04-06 20:25:17,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012590611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:17,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766346661] [2022-04-06 20:25:17,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:17,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:17,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:17,275 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:17,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:25:17,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:17,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:17,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 20:25:17,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 20:25:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766346661] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:17,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-04-06 20:25:17,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:17,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454896855] [2022-04-06 20:25:17,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454896855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:17,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:17,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:25:17,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809960135] [2022-04-06 20:25:17,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:17,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:25:17,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:17,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:25:17,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:25:17,565 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:17,954 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-04-06 20:25:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:25:17,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:25:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:17,968 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:25:17,968 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:25:17,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:25:17,969 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:17,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 84 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:25:17,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 20:25:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 20:25:17,978 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-04-06 20:25:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:17,979 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 20:25:17,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 20:25:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:25:17,981 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:17,981 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:18,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:18,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:25:18,203 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1800740933, now seen corresponding path program 25 times [2022-04-06 20:25:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:18,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [854383617] [2022-04-06 20:25:18,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:18,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1800740933, now seen corresponding path program 26 times [2022-04-06 20:25:18,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:18,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530113685] [2022-04-06 20:25:18,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:18,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:18,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:18,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:18,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530113685] [2022-04-06 20:25:18,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530113685] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:18,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576913461] [2022-04-06 20:25:18,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:18,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:18,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:18,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:18,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:25:18,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:18,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:18,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:25:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:18,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:19,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576913461] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:19,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:19,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 53 [2022-04-06 20:25:19,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:19,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [854383617] [2022-04-06 20:25:19,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [854383617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:19,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:19,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:25:19,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145300176] [2022-04-06 20:25:19,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:19,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:25:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:19,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:25:19,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2384, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:25:19,471 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:20,073 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-04-06 20:25:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:25:20,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:25:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:20,073 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:25:20,074 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:25:20,075 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:25:20,075 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:20,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 24 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:25:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:25:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 20:25:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-04-06 20:25:20,083 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2022-04-06 20:25:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:20,083 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-04-06 20:25:20,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:20,083 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-04-06 20:25:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:25:20,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:20,083 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:20,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:20,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:25:20,291 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2105498611, now seen corresponding path program 27 times [2022-04-06 20:25:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [420956870] [2022-04-06 20:25:20,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:20,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:20,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2105498611, now seen corresponding path program 28 times [2022-04-06 20:25:20,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:20,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200236345] [2022-04-06 20:25:20,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:20,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:20,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:20,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200236345] [2022-04-06 20:25:20,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200236345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:20,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035001188] [2022-04-06 20:25:20,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:20,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:20,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:20,526 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:20,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:25:20,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:25:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:20,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:21,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035001188] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:21,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:21,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2022-04-06 20:25:21,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:21,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [420956870] [2022-04-06 20:25:21,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [420956870] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:21,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:21,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:25:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941318300] [2022-04-06 20:25:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:21,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:25:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:25:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2668, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:25:21,675 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:22,321 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-04-06 20:25:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:25:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:25:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:22,322 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:25:22,322 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:25:22,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=512, Invalid=4744, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:25:22,323 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:22,324 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 34 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:25:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 20:25:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:22,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-04-06 20:25:22,332 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2022-04-06 20:25:22,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:22,332 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-04-06 20:25:22,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-04-06 20:25:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:25:22,333 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:22,333 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:22,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:22,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:22,534 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -748868795, now seen corresponding path program 29 times [2022-04-06 20:25:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:22,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510123896] [2022-04-06 20:25:22,536 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:22,536 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:22,536 INFO L85 PathProgramCache]: Analyzing trace with hash -748868795, now seen corresponding path program 30 times [2022-04-06 20:25:22,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:22,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079084442] [2022-04-06 20:25:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079084442] [2022-04-06 20:25:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079084442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449384539] [2022-04-06 20:25:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:22,778 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:22,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:25:22,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:22,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-04-06 20:25:22,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 83 proven. 2 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-04-06 20:25:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449384539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:23,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 5, 5] total 27 [2022-04-06 20:25:23,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:23,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510123896] [2022-04-06 20:25:23,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510123896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:23,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:23,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:25:23,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212839563] [2022-04-06 20:25:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:23,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:25:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:25:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:25:23,087 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:23,649 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-04-06 20:25:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:25:23,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:25:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:23,650 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:25:23,650 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:25:23,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=389, Invalid=1591, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:25:23,651 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:23,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 84 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:25:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:25:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-04-06 20:25:23,660 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-04-06 20:25:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:23,660 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-04-06 20:25:23,660 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-04-06 20:25:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:25:23,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:23,660 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:23,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 20:25:23,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:23,863 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1032275699, now seen corresponding path program 31 times [2022-04-06 20:25:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232172836] [2022-04-06 20:25:23,865 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:23,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:23,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1032275699, now seen corresponding path program 32 times [2022-04-06 20:25:23,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:23,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667675947] [2022-04-06 20:25:23,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:23,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:24,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:24,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667675947] [2022-04-06 20:25:24,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667675947] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:24,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26006330] [2022-04-06 20:25:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:24,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:24,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:24,159 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:24,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:25:24,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:24,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:25:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 530 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 530 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26006330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:25,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 62 [2022-04-06 20:25:25,599 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232172836] [2022-04-06 20:25:25,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232172836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:25,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:25,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:25:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506357006] [2022-04-06 20:25:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:25,600 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:25:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:25:25,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3284, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:25:25,601 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:26,401 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-04-06 20:25:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:25:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:25:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:26,402 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:25:26,402 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:25:26,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=610, Invalid=5870, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:25:26,404 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:26,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 54 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:25:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:25:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 20:25:26,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:26,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-04-06 20:25:26,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2022-04-06 20:25:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:26,412 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-04-06 20:25:26,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-04-06 20:25:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:25:26,412 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:26,412 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:26,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:26,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:26,627 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:26,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -101648827, now seen corresponding path program 33 times [2022-04-06 20:25:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:26,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214240066] [2022-04-06 20:25:26,629 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:26,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -101648827, now seen corresponding path program 34 times [2022-04-06 20:25:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:26,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979744941] [2022-04-06 20:25:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:26,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979744941] [2022-04-06 20:25:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979744941] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411583952] [2022-04-06 20:25:26,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:26,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:26,918 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:26,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:25:26,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:26,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:26,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:25:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:27,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:28,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411583952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:28,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:28,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 65 [2022-04-06 20:25:28,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:28,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214240066] [2022-04-06 20:25:28,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214240066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:28,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:28,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:25:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269006755] [2022-04-06 20:25:28,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:28,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:25:28,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:28,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:25:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=3616, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:25:28,579 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:29,589 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-04-06 20:25:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:25:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 20:25:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:29,592 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:25:29,592 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:25:29,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=662, Invalid=6478, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:25:29,594 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:29,595 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 79 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:25:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-04-06 20:25:29,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:29,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-04-06 20:25:29,605 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-04-06 20:25:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:29,605 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-04-06 20:25:29,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-04-06 20:25:29,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:25:29,606 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:29,606 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:29,806 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 20:25:29,807 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:29,807 INFO L85 PathProgramCache]: Analyzing trace with hash 189599245, now seen corresponding path program 35 times [2022-04-06 20:25:29,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:29,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1294219699] [2022-04-06 20:25:29,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:29,809 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:29,809 INFO L85 PathProgramCache]: Analyzing trace with hash 189599245, now seen corresponding path program 36 times [2022-04-06 20:25:29,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:29,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097499656] [2022-04-06 20:25:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:29,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:30,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:30,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097499656] [2022-04-06 20:25:30,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097499656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:30,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145767216] [2022-04-06 20:25:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:30,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:30,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:30,211 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:30,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:25:30,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-04-06 20:25:30,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-04-06 20:25:30,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145767216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:30,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:30,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5, 5] total 30 [2022-04-06 20:25:30,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1294219699] [2022-04-06 20:25:30,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1294219699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:30,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:30,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:25:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557522165] [2022-04-06 20:25:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:30,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:25:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:25:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:25:30,587 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:31,339 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-04-06 20:25:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:25:31,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-04-06 20:25:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:31,340 INFO L225 Difference]: With dead ends: 89 [2022-04-06 20:25:31,340 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:25:31,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=2098, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:25:31,341 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:31,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:25:31,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 20:25:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-04-06 20:25:31,352 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-04-06 20:25:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:31,353 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-04-06 20:25:31,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-04-06 20:25:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:25:31,353 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:31,353 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:31,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:25:31,554 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:25:31,554 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:31,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:31,554 INFO L85 PathProgramCache]: Analyzing trace with hash 926974277, now seen corresponding path program 37 times [2022-04-06 20:25:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:31,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107358727] [2022-04-06 20:25:31,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:31,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 926974277, now seen corresponding path program 38 times [2022-04-06 20:25:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392527103] [2022-04-06 20:25:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:31,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:31,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392527103] [2022-04-06 20:25:31,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392527103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:31,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842623191] [2022-04-06 20:25:31,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:31,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:31,907 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:31,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:25:31,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:31,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:31,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:25:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 713 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:32,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 713 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842623191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:33,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 71 [2022-04-06 20:25:33,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107358727] [2022-04-06 20:25:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107358727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:33,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:33,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:25:33,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838789475] [2022-04-06 20:25:33,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:33,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:25:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:33,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:25:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=4328, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:25:33,724 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:34,760 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-04-06 20:25:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:25:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:25:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:34,761 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:25:34,761 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:25:34,762 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=772, Invalid=7784, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:25:34,762 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:34,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 119 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:25:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:25:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-04-06 20:25:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-04-06 20:25:34,772 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2022-04-06 20:25:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:34,772 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-04-06 20:25:34,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-04-06 20:25:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:25:34,772 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:34,773 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:34,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:25:34,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:34,987 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:34,988 INFO L85 PathProgramCache]: Analyzing trace with hash -691166451, now seen corresponding path program 39 times [2022-04-06 20:25:34,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:34,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056231060] [2022-04-06 20:25:34,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:34,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash -691166451, now seen corresponding path program 40 times [2022-04-06 20:25:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:34,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886507418] [2022-04-06 20:25:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:35,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:35,353 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886507418] [2022-04-06 20:25:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886507418] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:35,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284176637] [2022-04-06 20:25:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:35,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:35,355 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:35,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:25:35,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:35,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:35,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 20:25:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:36,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:37,212 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284176637] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:37,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:37,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 74 [2022-04-06 20:25:37,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:37,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056231060] [2022-04-06 20:25:37,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056231060] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:37,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:37,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:25:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994678349] [2022-04-06 20:25:37,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:37,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:25:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:37,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:25:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=4708, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:25:37,215 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:38,336 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-04-06 20:25:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:25:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-04-06 20:25:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:38,345 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:25:38,350 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 20:25:38,351 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=830, Invalid=8482, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:25:38,353 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:38,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 39 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:25:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 20:25:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-04-06 20:25:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-04-06 20:25:38,364 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2022-04-06 20:25:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:38,364 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-04-06 20:25:38,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-04-06 20:25:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:25:38,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:38,365 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:38,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:25:38,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:38,567 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -8663995, now seen corresponding path program 41 times [2022-04-06 20:25:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645550221] [2022-04-06 20:25:38,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:38,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -8663995, now seen corresponding path program 42 times [2022-04-06 20:25:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257271054] [2022-04-06 20:25:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:39,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257271054] [2022-04-06 20:25:39,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257271054] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644020026] [2022-04-06 20:25:39,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:39,008 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:39,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:25:39,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:25:39,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-04-06 20:25:39,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-04-06 20:25:39,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644020026] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:39,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:39,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2022-04-06 20:25:39,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:39,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645550221] [2022-04-06 20:25:39,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645550221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:39,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:39,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:25:39,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313263891] [2022-04-06 20:25:39,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:39,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:25:39,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:39,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:25:39,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:25:39,371 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:40,156 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-04-06 20:25:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:25:40,156 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 20:25:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:40,157 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:25:40,157 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:25:40,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=515, Invalid=2677, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:25:40,157 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:40,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 49 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:25:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:25:40,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 20:25:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-04-06 20:25:40,168 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2022-04-06 20:25:40,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:40,168 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-04-06 20:25:40,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:40,168 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-04-06 20:25:40,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:25:40,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:40,169 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:40,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:25:40,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:25:40,379 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash 46823437, now seen corresponding path program 43 times [2022-04-06 20:25:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340706698] [2022-04-06 20:25:40,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:40,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash 46823437, now seen corresponding path program 44 times [2022-04-06 20:25:40,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349815550] [2022-04-06 20:25:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:40,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 49 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349815550] [2022-04-06 20:25:40,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349815550] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:40,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174862185] [2022-04-06 20:25:40,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:40,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:40,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:40,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:25:40,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:40,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:25:40,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 923 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:41,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 923 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174862185] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:42,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:42,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 80 [2022-04-06 20:25:42,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:42,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340706698] [2022-04-06 20:25:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340706698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:42,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:42,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:25:42,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456939125] [2022-04-06 20:25:42,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:42,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:25:42,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:42,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:25:42,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=804, Invalid=5516, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:25:42,914 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:44,243 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-04-06 20:25:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:25:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-04-06 20:25:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:44,250 INFO L225 Difference]: With dead ends: 101 [2022-04-06 20:25:44,251 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 20:25:44,260 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=952, Invalid=9968, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:25:44,261 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:44,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 134 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 20:25:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-06 20:25:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-04-06 20:25:44,272 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2022-04-06 20:25:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:44,272 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-04-06 20:25:44,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-04-06 20:25:44,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:25:44,273 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:44,273 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:44,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:25:44,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:25:44,487 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash -489498811, now seen corresponding path program 45 times [2022-04-06 20:25:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:44,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203975806] [2022-04-06 20:25:44,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:44,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -489498811, now seen corresponding path program 46 times [2022-04-06 20:25:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:44,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545595888] [2022-04-06 20:25:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:44,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:44,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545595888] [2022-04-06 20:25:44,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545595888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:44,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323959757] [2022-04-06 20:25:44,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:44,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:44,886 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:44,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:25:44,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:44,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:44,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:25:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:45,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323959757] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:47,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:47,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 83 [2022-04-06 20:25:47,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203975806] [2022-04-06 20:25:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203975806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:47,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:47,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:25:47,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920881724] [2022-04-06 20:25:47,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:47,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:25:47,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:47,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:25:47,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=862, Invalid=5944, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:25:47,128 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:48,509 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-04-06 20:25:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:25:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 20:25:48,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:48,510 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:25:48,510 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:25:48,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1016, Invalid=10756, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:25:48,511 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1952 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:48,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 54 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:25:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-04-06 20:25:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:48,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-04-06 20:25:48,522 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-04-06 20:25:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:48,522 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-04-06 20:25:48,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-04-06 20:25:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 20:25:48,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:48,523 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:48,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:48,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:25:48,726 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash -787247859, now seen corresponding path program 47 times [2022-04-06 20:25:48,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:48,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598719106] [2022-04-06 20:25:48,727 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:48,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -787247859, now seen corresponding path program 48 times [2022-04-06 20:25:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:48,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829880167] [2022-04-06 20:25:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:49,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829880167] [2022-04-06 20:25:49,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829880167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:49,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311803312] [2022-04-06 20:25:49,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:25:49,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:49,169 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:49,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:25:49,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:25:49,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:49,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:25:49,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-04-06 20:25:49,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2022-04-06 20:25:49,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311803312] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:49,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:49,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 38 [2022-04-06 20:25:49,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598719106] [2022-04-06 20:25:49,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598719106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:49,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:49,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:25:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554557666] [2022-04-06 20:25:49,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:49,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:25:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:49,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:25:49,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:25:49,686 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:50,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:50,740 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-04-06 20:25:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:25:50,740 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-04-06 20:25:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:50,741 INFO L225 Difference]: With dead ends: 107 [2022-04-06 20:25:50,741 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:25:50,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=597, Invalid=3563, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:25:50,742 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2136 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:50,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 79 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2136 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:25:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:25:50,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-06 20:25:50,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:50,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-04-06 20:25:50,754 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-04-06 20:25:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:50,755 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-04-06 20:25:50,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-04-06 20:25:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:25:50,756 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:50,756 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:50,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:25:50,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:25:50,972 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1921670587, now seen corresponding path program 49 times [2022-04-06 20:25:50,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:50,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117056625] [2022-04-06 20:25:50,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:50,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:50,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1921670587, now seen corresponding path program 50 times [2022-04-06 20:25:50,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:50,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911651274] [2022-04-06 20:25:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:50,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:51,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911651274] [2022-04-06 20:25:51,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911651274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:51,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054172079] [2022-04-06 20:25:51,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:25:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:51,415 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:51,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:25:51,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:25:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:51,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:25:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:52,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:54,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:54,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054172079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:54,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:54,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 89 [2022-04-06 20:25:54,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:54,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117056625] [2022-04-06 20:25:54,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117056625] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:54,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:54,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:25:54,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517313060] [2022-04-06 20:25:54,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:54,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:25:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:25:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=984, Invalid=6848, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:25:54,055 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:25:55,780 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-04-06 20:25:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:25:55,780 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 20:25:55,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:25:55,780 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:25:55,780 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:25:55,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1150, Invalid=12422, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:25:55,782 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:25:55,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 134 Invalid, 2419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:25:55,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:25:55,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 20:25:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-04-06 20:25:55,793 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-04-06 20:25:55,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:25:55,794 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-04-06 20:25:55,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:25:55,794 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-04-06 20:25:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:25:55,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:25:55,794 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:25:55,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:25:55,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:55,995 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:25:55,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:25:55,995 INFO L85 PathProgramCache]: Analyzing trace with hash -411508211, now seen corresponding path program 51 times [2022-04-06 20:25:55,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:55,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866131345] [2022-04-06 20:25:55,997 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:25:55,997 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:25:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -411508211, now seen corresponding path program 52 times [2022-04-06 20:25:55,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:25:55,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839739674] [2022-04-06 20:25:55,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:25:55,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:25:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:25:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:25:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:25:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:25:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839739674] [2022-04-06 20:25:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839739674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:25:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247637507] [2022-04-06 20:25:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:25:56,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:25:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:25:56,462 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:25:56,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:25:56,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:25:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:25:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:25:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:25:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:57,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:25:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:25:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247637507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:25:59,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:25:59,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 92 [2022-04-06 20:25:59,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:25:59,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866131345] [2022-04-06 20:25:59,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866131345] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:25:59,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:25:59,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:25:59,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870374838] [2022-04-06 20:25:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:25:59,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:25:59,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:25:59,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:25:59,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1048, Invalid=7324, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:25:59,256 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:00,964 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-04-06 20:26:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:26:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 20:26:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:00,965 INFO L225 Difference]: With dead ends: 113 [2022-04-06 20:26:00,965 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 20:26:00,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1220, Invalid=13300, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:26:00,966 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:00,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 129 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:26:00,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 20:26:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-04-06 20:26:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-04-06 20:26:00,979 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-04-06 20:26:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:00,980 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-04-06 20:26:00,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-04-06 20:26:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:26:00,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:00,980 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:00,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:01,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:01,187 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash -946590395, now seen corresponding path program 53 times [2022-04-06 20:26:01,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:01,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [369491004] [2022-04-06 20:26:01,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:01,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:01,189 INFO L85 PathProgramCache]: Analyzing trace with hash -946590395, now seen corresponding path program 54 times [2022-04-06 20:26:01,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:01,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447787330] [2022-04-06 20:26:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:01,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:01,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:01,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:01,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447787330] [2022-04-06 20:26:01,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447787330] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:01,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624059560] [2022-04-06 20:26:01,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:01,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:01,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:01,673 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:01,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:26:01,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:26:01,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:26:01,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:26:02,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624059560] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:02,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:02,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 5, 5] total 39 [2022-04-06 20:26:02,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:02,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [369491004] [2022-04-06 20:26:02,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [369491004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:02,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:02,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:26:02,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711996570] [2022-04-06 20:26:02,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:02,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:26:02,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:02,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:26:02,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:26:02,070 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:03,243 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-04-06 20:26:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:26:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 20:26:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:03,244 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:26:03,244 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:26:03,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=641, Invalid=4051, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:26:03,245 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2640 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:03,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 84 Invalid, 2701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2640 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:26:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:26:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-04-06 20:26:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:03,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-04-06 20:26:03,259 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2022-04-06 20:26:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:03,259 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-04-06 20:26:03,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-04-06 20:26:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:26:03,259 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:03,259 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:03,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:03,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 20:26:03,460 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1338668813, now seen corresponding path program 55 times [2022-04-06 20:26:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:03,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137840809] [2022-04-06 20:26:03,462 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:03,462 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:03,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1338668813, now seen corresponding path program 56 times [2022-04-06 20:26:03,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:03,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437907944] [2022-04-06 20:26:03,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:03,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:03,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 61 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:03,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437907944] [2022-04-06 20:26:03,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437907944] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:03,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728230900] [2022-04-06 20:26:03,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:03,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:03,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:03,980 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:03,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:26:04,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:04,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:04,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:26:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1424 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:05,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1424 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:07,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728230900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:07,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:07,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 98 [2022-04-06 20:26:07,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:07,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137840809] [2022-04-06 20:26:07,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137840809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:07,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:07,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:26:07,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84662921] [2022-04-06 20:26:07,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:07,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:26:07,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:07,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:26:07,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=8324, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:26:07,053 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:09,069 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-04-06 20:26:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:26:09,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-04-06 20:26:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:09,070 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:26:09,070 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 20:26:09,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1366, Invalid=15146, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:26:09,072 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:09,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 134 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:26:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 20:26:09,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-04-06 20:26:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-04-06 20:26:09,091 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-04-06 20:26:09,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:09,091 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-04-06 20:26:09,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-04-06 20:26:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:26:09,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:09,092 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:09,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:09,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:09,309 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1969125445, now seen corresponding path program 57 times [2022-04-06 20:26:09,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264228803] [2022-04-06 20:26:09,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:09,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:09,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1969125445, now seen corresponding path program 58 times [2022-04-06 20:26:09,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630852562] [2022-04-06 20:26:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:09,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:09,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:09,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:09,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630852562] [2022-04-06 20:26:09,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630852562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:09,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973386531] [2022-04-06 20:26:09,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:09,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:09,862 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:09,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:26:09,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:09,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:26:09,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:11,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973386531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:13,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 101 [2022-04-06 20:26:13,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:13,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264228803] [2022-04-06 20:26:13,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264228803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:13,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:26:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596098482] [2022-04-06 20:26:13,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:13,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:26:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:13,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:26:13,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1252, Invalid=8848, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:26:13,158 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:15,240 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 20:26:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:26:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 20:26:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:15,240 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:26:15,240 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:26:15,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1442, Invalid=16114, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:26:15,242 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:15,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 89 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:26:15,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:26:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-04-06 20:26:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-04-06 20:26:15,255 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2022-04-06 20:26:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:15,256 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-04-06 20:26:15,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-04-06 20:26:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 20:26:15,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:15,256 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:15,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:15,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:15,457 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:15,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2010663949, now seen corresponding path program 59 times [2022-04-06 20:26:15,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:15,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [519597641] [2022-04-06 20:26:15,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:15,459 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:15,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2010663949, now seen corresponding path program 60 times [2022-04-06 20:26:15,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:15,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113908945] [2022-04-06 20:26:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:15,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:16,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113908945] [2022-04-06 20:26:16,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113908945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067183035] [2022-04-06 20:26:16,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:16,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:16,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:16,077 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:16,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:26:16,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:26:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-04-06 20:26:16,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-04-06 20:26:16,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067183035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:16,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:16,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 5, 5] total 42 [2022-04-06 20:26:16,506 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:16,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [519597641] [2022-04-06 20:26:16,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [519597641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:16,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:16,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:26:16,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904961980] [2022-04-06 20:26:16,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:16,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:26:16,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:26:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:26:16,507 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:17,899 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-04-06 20:26:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:26:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-04-06 20:26:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:17,900 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:26:17,900 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:26:17,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=704, Invalid=4846, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:26:17,901 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:17,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 34 Invalid, 3199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:26:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:26:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-06 20:26:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:17,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-04-06 20:26:17,916 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2022-04-06 20:26:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:17,917 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-04-06 20:26:17,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:17,917 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-04-06 20:26:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:26:17,917 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:17,917 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:17,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:18,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 20:26:18,118 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1761311931, now seen corresponding path program 61 times [2022-04-06 20:26:18,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:18,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167859835] [2022-04-06 20:26:18,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:18,120 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1761311931, now seen corresponding path program 62 times [2022-04-06 20:26:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:18,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742924481] [2022-04-06 20:26:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:18,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:18,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 67 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742924481] [2022-04-06 20:26:18,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742924481] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:18,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877457952] [2022-04-06 20:26:18,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:18,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:18,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:18,708 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:18,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:26:18,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:26:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1715 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877457952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:22,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:22,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 107 [2022-04-06 20:26:22,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:22,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167859835] [2022-04-06 20:26:22,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167859835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:22,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:22,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:26:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10759616] [2022-04-06 20:26:22,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:22,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:26:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:26:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1398, Invalid=9944, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:26:22,347 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:24,779 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-04-06 20:26:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:26:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 20:26:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:24,780 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:26:24,780 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:26:24,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1600, Invalid=18140, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:26:24,781 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:24,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 109 Invalid, 3487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:26:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:26:24,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-04-06 20:26:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:24,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-04-06 20:26:24,798 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-04-06 20:26:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:24,799 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-04-06 20:26:24,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-04-06 20:26:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:26:24,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:24,800 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:24,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:26:25,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:26:25,004 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash 829579533, now seen corresponding path program 63 times [2022-04-06 20:26:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948322611] [2022-04-06 20:26:25,006 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:25,006 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash 829579533, now seen corresponding path program 64 times [2022-04-06 20:26:25,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:25,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304771204] [2022-04-06 20:26:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:25,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304771204] [2022-04-06 20:26:25,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304771204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:25,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944941777] [2022-04-06 20:26:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:25,628 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:25,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:26:25,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:25,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:25,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:26:25,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1818 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:27,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1818 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:29,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944941777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:29,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:29,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 110 [2022-04-06 20:26:29,505 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:29,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948322611] [2022-04-06 20:26:29,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948322611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:29,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:29,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:26:29,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019049891] [2022-04-06 20:26:29,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:29,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:26:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:29,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:26:29,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=10516, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:26:29,507 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:31,908 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-04-06 20:26:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:26:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-04-06 20:26:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:31,909 INFO L225 Difference]: With dead ends: 131 [2022-04-06 20:26:31,909 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:26:31,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1682, Invalid=19198, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:26:31,912 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:31,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 119 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:26:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:26:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-04-06 20:26:31,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-04-06 20:26:31,933 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-04-06 20:26:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:31,933 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-04-06 20:26:31,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-04-06 20:26:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:26:31,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:31,934 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:31,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:26:32,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:26:32,135 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:32,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1219907141, now seen corresponding path program 65 times [2022-04-06 20:26:32,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:32,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527737899] [2022-04-06 20:26:32,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:32,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1219907141, now seen corresponding path program 66 times [2022-04-06 20:26:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:32,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904645027] [2022-04-06 20:26:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:32,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 71 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904645027] [2022-04-06 20:26:32,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904645027] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:32,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882034486] [2022-04-06 20:26:32,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:32,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:32,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:32,805 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:32,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:26:32,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:32,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:26:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-04-06 20:26:33,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-04-06 20:26:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882034486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:33,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:33,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 5, 5] total 45 [2022-04-06 20:26:33,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:33,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527737899] [2022-04-06 20:26:33,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527737899] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:33,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:33,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:26:33,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295533580] [2022-04-06 20:26:33,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:33,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:26:33,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:26:33,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1638, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:26:33,279 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:35,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:35,050 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-04-06 20:26:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:26:35,050 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 20:26:35,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:35,051 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:26:35,051 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:26:35,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=767, Invalid=5713, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:26:35,052 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3894 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:35,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 164 Invalid, 3967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3894 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:26:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:26:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-04-06 20:26:35,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-04-06 20:26:35,071 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2022-04-06 20:26:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:35,072 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-04-06 20:26:35,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-04-06 20:26:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 20:26:35,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:35,072 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:35,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 20:26:35,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:35,288 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:35,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1301760499, now seen corresponding path program 67 times [2022-04-06 20:26:35,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:35,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335457861] [2022-04-06 20:26:35,290 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:35,290 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:35,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1301760499, now seen corresponding path program 68 times [2022-04-06 20:26:35,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752647753] [2022-04-06 20:26:35,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:35,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 73 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752647753] [2022-04-06 20:26:35,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752647753] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:35,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068573865] [2022-04-06 20:26:35,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:35,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:35,981 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:35,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:26:36,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:36,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:26:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:37,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:40,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068573865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:40,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:40,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 116 [2022-04-06 20:26:40,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:40,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335457861] [2022-04-06 20:26:40,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335457861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:40,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:40,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:26:40,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229751968] [2022-04-06 20:26:40,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:40,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:26:40,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:40,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:26:40,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1632, Invalid=11708, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:26:40,336 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:43,070 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-04-06 20:26:43,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:26:43,070 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-04-06 20:26:43,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:43,070 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:26:43,071 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:26:43,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1852, Invalid=21404, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:26:43,072 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 4171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:43,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 154 Invalid, 4171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:26:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:26:43,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-04-06 20:26:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-04-06 20:26:43,090 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-04-06 20:26:43,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:43,090 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-04-06 20:26:43,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:43,090 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-04-06 20:26:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:26:43,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:43,091 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:43,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:26:43,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:26:43,303 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:43,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1029449403, now seen corresponding path program 69 times [2022-04-06 20:26:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290562918] [2022-04-06 20:26:43,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:43,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:43,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1029449403, now seen corresponding path program 70 times [2022-04-06 20:26:43,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:43,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605082472] [2022-04-06 20:26:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:44,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:44,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605082472] [2022-04-06 20:26:44,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605082472] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366582402] [2022-04-06 20:26:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:26:44,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:44,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:44,016 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:44,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:26:44,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:26:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:44,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:26:44,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:45,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:48,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366582402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:48,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:48,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 119 [2022-04-06 20:26:48,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:48,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290562918] [2022-04-06 20:26:48,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290562918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:48,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:48,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:26:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109586992] [2022-04-06 20:26:48,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:48,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:26:48,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:48,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:26:48,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1714, Invalid=12328, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:26:48,415 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:51,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:51,182 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2022-04-06 20:26:51,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:26:51,182 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 20:26:51,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:51,183 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:26:51,183 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:26:51,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1940, Invalid=22552, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:26:51,184 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4166 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:51,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 4243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4166 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:26:51,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:26:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-04-06 20:26:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-04-06 20:26:51,202 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2022-04-06 20:26:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:51,203 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-04-06 20:26:51,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-04-06 20:26:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 20:26:51,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:51,203 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:51,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:26:51,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:26:51,420 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:51,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1802810611, now seen corresponding path program 71 times [2022-04-06 20:26:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:51,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2015449261] [2022-04-06 20:26:51,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:51,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1802810611, now seen corresponding path program 72 times [2022-04-06 20:26:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417757604] [2022-04-06 20:26:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:52,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:52,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417757604] [2022-04-06 20:26:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417757604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351043232] [2022-04-06 20:26:52,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:26:52,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:52,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:52,116 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:52,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:26:52,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:26:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:26:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2022-04-06 20:26:52,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:26:52,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2022-04-06 20:26:52,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351043232] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:26:52,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:26:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 6, 6] total 50 [2022-04-06 20:26:52,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:26:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2015449261] [2022-04-06 20:26:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2015449261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:26:52,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:26:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:26:52,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932083709] [2022-04-06 20:26:52,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:26:52,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:26:52,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:52,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:26:52,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2065, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:26:52,731 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:26:54,742 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-04-06 20:26:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:26:54,743 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-04-06 20:26:54,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:26:54,743 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:26:54,743 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 20:26:54,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=849, Invalid=6983, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:26:54,744 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4518 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:26:54,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 134 Invalid, 4597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4518 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:26:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 20:26:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-06 20:26:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-04-06 20:26:54,765 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-04-06 20:26:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:26:54,765 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-04-06 20:26:54,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:26:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-04-06 20:26:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:26:54,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:26:54,766 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:26:54,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 20:26:54,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:54,984 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:26:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:26:54,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1492984901, now seen corresponding path program 73 times [2022-04-06 20:26:54,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:26:54,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [23941036] [2022-04-06 20:26:54,986 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:26:54,986 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:26:54,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1492984901, now seen corresponding path program 74 times [2022-04-06 20:26:54,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:26:54,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626822598] [2022-04-06 20:26:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:26:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:26:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:26:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:26:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 79 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:26:55,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:26:55,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626822598] [2022-04-06 20:26:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626822598] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:26:55,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328753286] [2022-04-06 20:26:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:26:55,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:26:55,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:26:55,740 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:26:55,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:26:55,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:26:55,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:26:55,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:26:55,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:26:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:26:57,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 2378 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328753286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:00,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:00,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 125 [2022-04-06 20:27:00,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [23941036] [2022-04-06 20:27:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [23941036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:00,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:00,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:27:00,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4573859] [2022-04-06 20:27:00,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:00,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:27:00,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:27:00,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1884, Invalid=13616, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:27:00,605 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:03,739 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-04-06 20:27:03,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:27:03,739 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 20:27:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:03,740 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:27:03,740 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:27:03,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2122, Invalid=24938, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:27:03,742 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4690 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 4771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:03,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 84 Invalid, 4771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4690 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:27:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:27:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-04-06 20:27:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-04-06 20:27:03,764 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 131 [2022-04-06 20:27:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:03,764 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-04-06 20:27:03,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-04-06 20:27:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 20:27:03,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:03,765 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:03,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:03,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:27:03,981 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -710270963, now seen corresponding path program 75 times [2022-04-06 20:27:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:03,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [107524049] [2022-04-06 20:27:03,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:03,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash -710270963, now seen corresponding path program 76 times [2022-04-06 20:27:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:03,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726504942] [2022-04-06 20:27:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:03,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:04,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726504942] [2022-04-06 20:27:04,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726504942] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:04,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023203930] [2022-04-06 20:27:04,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:27:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:04,794 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:04,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:27:04,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:27:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:27:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2499 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:06,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2499 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:09,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023203930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:09,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:09,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 128 [2022-04-06 20:27:09,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [107524049] [2022-04-06 20:27:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [107524049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:09,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:27:09,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543795567] [2022-04-06 20:27:09,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:09,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:27:09,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:27:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1972, Invalid=14284, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:27:09,994 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:13,241 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-04-06 20:27:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:27:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-04-06 20:27:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:13,242 INFO L225 Difference]: With dead ends: 149 [2022-04-06 20:27:13,242 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 20:27:13,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2216, Invalid=26176, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:27:13,251 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4868 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:13,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 34 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4868 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:27:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 20:27:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-04-06 20:27:13,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-04-06 20:27:13,275 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2022-04-06 20:27:13,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:13,276 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-04-06 20:27:13,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-04-06 20:27:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:27:13,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:13,277 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:13,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:13,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:13,489 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2079469381, now seen corresponding path program 77 times [2022-04-06 20:27:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:13,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560257191] [2022-04-06 20:27:13,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:13,491 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2079469381, now seen corresponding path program 78 times [2022-04-06 20:27:13,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:13,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127170789] [2022-04-06 20:27:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:13,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:14,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127170789] [2022-04-06 20:27:14,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127170789] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:14,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563072431] [2022-04-06 20:27:14,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:27:14,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:14,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:14,297 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:14,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:27:14,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:27:14,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:27:14,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 20:27:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 203 proven. 2 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2022-04-06 20:27:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563072431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:14,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:14,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 5, 5] total 51 [2022-04-06 20:27:14,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:14,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560257191] [2022-04-06 20:27:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560257191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:14,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:14,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:27:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983641146] [2022-04-06 20:27:14,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:14,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:27:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:27:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2154, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:27:14,819 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:17,023 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2022-04-06 20:27:17,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:27:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 20:27:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:17,024 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:27:17,024 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:27:17,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=893, Invalid=7663, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:27:17,025 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 5293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:17,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 5293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 5208 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:27:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:27:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-04-06 20:27:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-04-06 20:27:17,050 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-04-06 20:27:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:17,050 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-04-06 20:27:17,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-04-06 20:27:17,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 20:27:17,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:17,050 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:17,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:17,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:17,262 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash -678087411, now seen corresponding path program 79 times [2022-04-06 20:27:17,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1383254260] [2022-04-06 20:27:17,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:17,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -678087411, now seen corresponding path program 80 times [2022-04-06 20:27:17,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:17,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31503295] [2022-04-06 20:27:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:17,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:18,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:18,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31503295] [2022-04-06 20:27:18,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31503295] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:18,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409150859] [2022-04-06 20:27:18,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:18,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:18,069 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:18,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:27:18,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:18,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:18,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:27:18,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2750 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:19,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 2750 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409150859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:23,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 134 [2022-04-06 20:27:23,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:23,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1383254260] [2022-04-06 20:27:23,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1383254260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:23,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:23,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:27:23,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382581473] [2022-04-06 20:27:23,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:23,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:27:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:27:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2154, Invalid=15668, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:27:23,566 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:27,274 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-04-06 20:27:27,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:27:27,274 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-04-06 20:27:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:27,275 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:27:27,275 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:27:27,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2410, Invalid=28742, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:27:27,276 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5572 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 5659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:27,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 209 Invalid, 5659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5572 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:27:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:27:27,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-04-06 20:27:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-04-06 20:27:27,299 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2022-04-06 20:27:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:27,299 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-04-06 20:27:27,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-04-06 20:27:27,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:27:27,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:27,300 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:27,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:27:27,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 20:27:27,500 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:27,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1213007291, now seen corresponding path program 81 times [2022-04-06 20:27:27,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:27,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2037164915] [2022-04-06 20:27:27,503 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:27,503 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1213007291, now seen corresponding path program 82 times [2022-04-06 20:27:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:27,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683319226] [2022-04-06 20:27:27,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:27,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:28,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:28,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683319226] [2022-04-06 20:27:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683319226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:28,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381897164] [2022-04-06 20:27:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:27:28,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:28,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:28,360 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:28,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:27:28,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:27:28,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 20:27:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2880 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:30,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2880 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381897164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:34,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 137 [2022-04-06 20:27:34,165 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:34,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2037164915] [2022-04-06 20:27:34,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2037164915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:34,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:34,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:27:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232290562] [2022-04-06 20:27:34,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:34,166 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:27:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:27:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2248, Invalid=16384, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:27:34,167 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:38,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:38,429 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-04-06 20:27:38,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:27:38,430 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 20:27:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:38,430 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:27:38,430 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:27:38,431 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=2510, Invalid=30070, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:27:38,432 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5612 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:38,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 29 Invalid, 5701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5612 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:27:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:27:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-04-06 20:27:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-04-06 20:27:38,453 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 143 [2022-04-06 20:27:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:38,453 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-04-06 20:27:38,453 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-04-06 20:27:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 20:27:38,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:38,454 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:38,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:38,654 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:27:38,655 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1612483085, now seen corresponding path program 83 times [2022-04-06 20:27:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:38,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098171679] [2022-04-06 20:27:38,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:38,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:38,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1612483085, now seen corresponding path program 84 times [2022-04-06 20:27:38,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:38,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16522517] [2022-04-06 20:27:38,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:38,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:39,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:39,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:39,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16522517] [2022-04-06 20:27:39,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16522517] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:39,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088296870] [2022-04-06 20:27:39,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:27:39,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:39,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:39,593 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:39,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:27:39,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:27:39,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:39,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:27:39,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2022-04-06 20:27:39,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2022-04-06 20:27:40,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088296870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:40,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:40,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 5, 5] total 54 [2022-04-06 20:27:40,137 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:40,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098171679] [2022-04-06 20:27:40,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098171679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:40,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:40,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:27:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070689070] [2022-04-06 20:27:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:40,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:27:40,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:27:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2439, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:27:40,138 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:42,630 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-04-06 20:27:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:27:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-04-06 20:27:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:42,631 INFO L225 Difference]: With dead ends: 161 [2022-04-06 20:27:42,631 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 20:27:42,632 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=956, Invalid=8746, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:27:42,632 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 5982 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 6073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 5982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:42,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 119 Invalid, 6073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 5982 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:27:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 20:27:42,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-04-06 20:27:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-04-06 20:27:42,655 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2022-04-06 20:27:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:42,655 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-04-06 20:27:42,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-04-06 20:27:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:27:42,656 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:42,656 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:42,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:42,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:27:42,859 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1267759803, now seen corresponding path program 85 times [2022-04-06 20:27:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494653278] [2022-04-06 20:27:42,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:42,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:42,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1267759803, now seen corresponding path program 86 times [2022-04-06 20:27:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:42,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903393153] [2022-04-06 20:27:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:43,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 91 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:43,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:43,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903393153] [2022-04-06 20:27:43,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903393153] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:43,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874424254] [2022-04-06 20:27:43,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:27:43,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:43,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:43,803 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:43,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:27:43,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:27:43,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:43,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:27:43,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:46,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:27:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:50,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874424254] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:27:50,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:27:50,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 143 [2022-04-06 20:27:50,098 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:27:50,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494653278] [2022-04-06 20:27:50,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494653278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:27:50,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:27:50,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:27:50,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625733027] [2022-04-06 20:27:50,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:27:50,098 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:27:50,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:27:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2442, Invalid=17864, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:27:50,104 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:27:54,194 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2022-04-06 20:27:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:27:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 20:27:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:27:54,195 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:27:54,195 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 20:27:54,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2716, Invalid=32816, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:27:54,196 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6142 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:27:54,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 29 Invalid, 6235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6142 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:27:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 20:27:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-04-06 20:27:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-04-06 20:27:54,220 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2022-04-06 20:27:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:27:54,220 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-04-06 20:27:54,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:27:54,220 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-04-06 20:27:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-06 20:27:54,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:27:54,221 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:27:54,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:27:54,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:54,422 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:27:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:27:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1726996723, now seen corresponding path program 87 times [2022-04-06 20:27:54,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:27:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574007507] [2022-04-06 20:27:54,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:27:54,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:27:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1726996723, now seen corresponding path program 88 times [2022-04-06 20:27:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:27:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202403952] [2022-04-06 20:27:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:27:54,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:27:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:27:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:27:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:27:55,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:27:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202403952] [2022-04-06 20:27:55,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202403952] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:27:55,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486805618] [2022-04-06 20:27:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:27:55,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:27:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:27:55,440 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:27:55,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:27:55,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:27:55,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:27:55,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:27:55,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:27:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3288 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:27:57,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3288 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:02,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486805618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:02,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:02,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 146 [2022-04-06 20:28:02,000 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:02,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574007507] [2022-04-06 20:28:02,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574007507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:02,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:02,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:28:02,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795906374] [2022-04-06 20:28:02,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:02,001 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:28:02,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:28:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2542, Invalid=18628, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:28:02,002 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:06,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:06,294 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-04-06 20:28:06,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:28:06,294 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-04-06 20:28:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:06,297 INFO L225 Difference]: With dead ends: 167 [2022-04-06 20:28:06,298 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:28:06,300 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2822, Invalid=34234, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:28:06,300 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6530 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 6625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 6530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:06,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 124 Invalid, 6625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 6530 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:28:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:28:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-04-06 20:28:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-04-06 20:28:06,330 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2022-04-06 20:28:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:06,330 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-04-06 20:28:06,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-04-06 20:28:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:28:06,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:06,331 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:06,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:06,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:28:06,532 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:06,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:06,532 INFO L85 PathProgramCache]: Analyzing trace with hash 911724613, now seen corresponding path program 89 times [2022-04-06 20:28:06,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:06,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2091096006] [2022-04-06 20:28:06,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:06,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash 911724613, now seen corresponding path program 90 times [2022-04-06 20:28:06,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:06,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002351272] [2022-04-06 20:28:06,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:07,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:07,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002351272] [2022-04-06 20:28:07,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002351272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:07,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087808874] [2022-04-06 20:28:07,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:07,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:07,546 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:07,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:28:07,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:28:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:28:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-04-06 20:28:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 233 proven. 2 refuted. 0 times theorem prover too weak. 3197 trivial. 0 not checked. [2022-04-06 20:28:08,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087808874] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:08,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:08,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 5, 5] total 57 [2022-04-06 20:28:08,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:08,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2091096006] [2022-04-06 20:28:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2091096006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:08,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:08,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:28:08,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988639964] [2022-04-06 20:28:08,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:08,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:28:08,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:28:08,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=2742, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:28:08,094 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:11,127 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-04-06 20:28:11,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:28:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 20:28:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:11,128 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:28:11,128 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:28:11,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1019, Invalid=9901, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:28:11,129 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6870 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 6967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:11,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 174 Invalid, 6967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6870 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:28:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:28:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-04-06 20:28:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-04-06 20:28:11,155 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2022-04-06 20:28:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:11,155 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-04-06 20:28:11,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-04-06 20:28:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 20:28:11,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:11,156 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:11,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 20:28:11,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:28:11,357 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash 272626701, now seen corresponding path program 91 times [2022-04-06 20:28:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376466328] [2022-04-06 20:28:11,358 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:11,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash 272626701, now seen corresponding path program 92 times [2022-04-06 20:28:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:11,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883500882] [2022-04-06 20:28:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:11,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:12,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883500882] [2022-04-06 20:28:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883500882] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756324380] [2022-04-06 20:28:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:12,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:12,391 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:12,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:28:12,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:12,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:12,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:28:12,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3575 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:14,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 3575 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:19,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756324380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:19,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:19,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 152 [2022-04-06 20:28:19,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376466328] [2022-04-06 20:28:19,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376466328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:19,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:19,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:28:19,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147840601] [2022-04-06 20:28:19,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:19,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:28:19,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:28:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2748, Invalid=20204, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:28:19,513 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:24,256 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-04-06 20:28:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:28:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-04-06 20:28:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:24,260 INFO L225 Difference]: With dead ends: 173 [2022-04-06 20:28:24,260 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 20:28:24,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=3040, Invalid=37160, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 20:28:24,262 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7210 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 7309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:24,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 219 Invalid, 7309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 7210 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:28:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 20:28:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-04-06 20:28:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:24,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-04-06 20:28:24,288 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2022-04-06 20:28:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:24,288 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-04-06 20:28:24,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-04-06 20:28:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:28:24,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:24,289 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:24,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:24,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:24,489 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:24,490 INFO L85 PathProgramCache]: Analyzing trace with hash 496753477, now seen corresponding path program 93 times [2022-04-06 20:28:24,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213335328] [2022-04-06 20:28:24,491 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:24,491 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:24,491 INFO L85 PathProgramCache]: Analyzing trace with hash 496753477, now seen corresponding path program 94 times [2022-04-06 20:28:24,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:24,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493745722] [2022-04-06 20:28:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:24,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:25,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:25,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493745722] [2022-04-06 20:28:25,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493745722] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:25,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906512988] [2022-04-06 20:28:25,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:25,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:25,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:25,566 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:25,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:28:25,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:25,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 20:28:25,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3723 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:28,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3723 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906512988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:32,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 155 [2022-04-06 20:28:32,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:32,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213335328] [2022-04-06 20:28:32,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213335328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:28:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602295998] [2022-04-06 20:28:32,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:32,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:28:32,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:28:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2854, Invalid=21016, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:28:32,969 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:37,791 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2022-04-06 20:28:37,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:28:37,791 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 20:28:37,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:37,792 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:28:37,792 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:28:37,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 221 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3152, Invalid=38668, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:28:37,795 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 7262 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:37,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 19 Invalid, 7363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 7262 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:28:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:28:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-04-06 20:28:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-04-06 20:28:37,831 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 161 [2022-04-06 20:28:37,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:37,831 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-04-06 20:28:37,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,831 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-04-06 20:28:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 20:28:37,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:37,832 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:37,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:28:38,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:28:38,040 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1216607987, now seen corresponding path program 95 times [2022-04-06 20:28:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:38,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [967966203] [2022-04-06 20:28:38,042 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:38,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1216607987, now seen corresponding path program 96 times [2022-04-06 20:28:38,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:38,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176641560] [2022-04-06 20:28:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:38,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:39,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176641560] [2022-04-06 20:28:39,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176641560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119862196] [2022-04-06 20:28:39,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:39,224 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:39,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:28:39,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:28:39,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:39,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:28:39,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-04-06 20:28:39,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 248 proven. 2 refuted. 0 times theorem prover too weak. 3626 trivial. 0 not checked. [2022-04-06 20:28:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119862196] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:39,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:39,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 5, 5] total 60 [2022-04-06 20:28:39,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:39,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [967966203] [2022-04-06 20:28:39,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [967966203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:39,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:39,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:28:39,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132878860] [2022-04-06 20:28:39,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:39,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:28:39,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:39,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:28:39,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:28:39,834 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:43,031 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-04-06 20:28:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:28:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-04-06 20:28:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:43,032 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:28:43,032 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 20:28:43,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1082, Invalid=11128, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:28:43,032 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:43,033 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 44 Invalid, 7693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7590 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:28:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 20:28:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-04-06 20:28:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-04-06 20:28:43,061 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2022-04-06 20:28:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:43,061 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-04-06 20:28:43,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-04-06 20:28:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:28:43,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:43,062 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:43,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:43,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:43,262 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:43,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:43,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1718330949, now seen corresponding path program 97 times [2022-04-06 20:28:43,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:43,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445165125] [2022-04-06 20:28:43,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:43,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1718330949, now seen corresponding path program 98 times [2022-04-06 20:28:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:43,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589475429] [2022-04-06 20:28:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:43,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 103 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:44,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589475429] [2022-04-06 20:28:44,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589475429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405982374] [2022-04-06 20:28:44,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:44,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:44,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:44,436 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:44,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:28:44,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:44,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:28:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4028 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 4028 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405982374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:52,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:52,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 161 [2022-04-06 20:28:52,435 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:52,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445165125] [2022-04-06 20:28:52,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445165125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:52,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:52,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:28:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347711803] [2022-04-06 20:28:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:52,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:28:52,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:52,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:28:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3072, Invalid=22688, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:28:52,437 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:57,803 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2022-04-06 20:28:57,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:28:57,803 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 20:28:57,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:57,804 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:28:57,804 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:28:57,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=3382, Invalid=41774, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 20:28:57,806 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 8152 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 8257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 8152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:57,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 259 Invalid, 8257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 8152 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:28:57,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:28:57,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-04-06 20:28:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-04-06 20:28:57,836 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 167 [2022-04-06 20:28:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:57,836 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-04-06 20:28:57,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-04-06 20:28:57,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-06 20:28:57,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:57,837 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:57,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:58,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:28:58,037 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:58,037 INFO L85 PathProgramCache]: Analyzing trace with hash -460038643, now seen corresponding path program 99 times [2022-04-06 20:28:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:58,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [250814771] [2022-04-06 20:28:58,039 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:58,039 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash -460038643, now seen corresponding path program 100 times [2022-04-06 20:28:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:58,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420423321] [2022-04-06 20:28:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:58,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:59,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420423321] [2022-04-06 20:28:59,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420423321] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:59,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995560142] [2022-04-06 20:28:59,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:59,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:59,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:59,216 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:59,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:28:59,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:59,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:59,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 20:28:59,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:02,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:07,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995560142] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:07,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:07,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 57, 57] total 164 [2022-04-06 20:29:07,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [250814771] [2022-04-06 20:29:07,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [250814771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:07,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:07,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:29:07,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801306784] [2022-04-06 20:29:07,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:07,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:29:07,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:29:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3184, Invalid=23548, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:29:07,523 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:12,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:12,952 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-04-06 20:29:12,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:29:12,952 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-04-06 20:29:12,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:12,953 INFO L225 Difference]: With dead ends: 185 [2022-04-06 20:29:12,953 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 20:29:12,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=3500, Invalid=43372, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:29:12,955 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8240 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 8347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 8240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:12,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 74 Invalid, 8347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 8240 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:29:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 20:29:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-06 20:29:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-04-06 20:29:12,985 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 170 [2022-04-06 20:29:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:12,985 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-04-06 20:29:12,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-04-06 20:29:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:29:12,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:12,986 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:13,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:13,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:29:13,186 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 687288645, now seen corresponding path program 101 times [2022-04-06 20:29:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835445349] [2022-04-06 20:29:13,188 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:13,188 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash 687288645, now seen corresponding path program 102 times [2022-04-06 20:29:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422440337] [2022-04-06 20:29:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:13,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:14,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422440337] [2022-04-06 20:29:14,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422440337] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:14,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569730129] [2022-04-06 20:29:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:14,464 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:29:14,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:29:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:29:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2022-04-06 20:29:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 4082 trivial. 0 not checked. [2022-04-06 20:29:15,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569730129] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:15,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:15,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 5, 5] total 63 [2022-04-06 20:29:15,086 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:15,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835445349] [2022-04-06 20:29:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835445349] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:15,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:15,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:29:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393230122] [2022-04-06 20:29:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:15,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:29:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:29:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=3402, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:29:15,101 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:18,650 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2022-04-06 20:29:18,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:29:18,650 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 20:29:18,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:18,651 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:29:18,651 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:29:18,652 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1145, Invalid=12427, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:29:18,652 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8616 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 8725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 8616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:18,652 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 124 Invalid, 8725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 8616 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:29:18,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:29:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-04-06 20:29:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-04-06 20:29:18,685 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 173 [2022-04-06 20:29:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:18,685 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-04-06 20:29:18,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-04-06 20:29:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 20:29:18,686 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:18,687 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:18,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:29:18,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:18,887 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:18,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1364783885, now seen corresponding path program 103 times [2022-04-06 20:29:18,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:18,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299857256] [2022-04-06 20:29:18,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:18,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1364783885, now seen corresponding path program 104 times [2022-04-06 20:29:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438972238] [2022-04-06 20:29:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:18,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:20,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:20,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:20,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438972238] [2022-04-06 20:29:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438972238] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:20,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147365804] [2022-04-06 20:29:20,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:20,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:20,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:20,148 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:20,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:29:20,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:20,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:20,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:29:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4508 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:23,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 4508 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:29,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147365804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:29,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59, 59] total 170 [2022-04-06 20:29:29,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299857256] [2022-04-06 20:29:29,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299857256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:29,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:29,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:29:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838091084] [2022-04-06 20:29:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:29,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:29:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:29:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3414, Invalid=25316, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 20:29:29,092 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:34,818 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-04-06 20:29:34,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:29:34,818 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-04-06 20:29:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:34,819 INFO L225 Difference]: With dead ends: 191 [2022-04-06 20:29:34,819 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:29:34,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3742, Invalid=46658, Unknown=0, NotChecked=0, Total=50400 [2022-04-06 20:29:34,833 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8998 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 9109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 8998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:34,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 174 Invalid, 9109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 8998 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:29:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:29:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-04-06 20:29:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-04-06 20:29:34,864 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-04-06 20:29:34,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:34,864 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-04-06 20:29:34,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-04-06 20:29:34,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:29:34,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:34,865 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:34,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:29:35,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:35,079 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:35,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1720812475, now seen corresponding path program 105 times [2022-04-06 20:29:35,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400574501] [2022-04-06 20:29:35,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:35,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:35,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1720812475, now seen corresponding path program 106 times [2022-04-06 20:29:35,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:35,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395231110] [2022-04-06 20:29:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:35,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 111 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:36,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395231110] [2022-04-06 20:29:36,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395231110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:36,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840511759] [2022-04-06 20:29:36,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:36,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:36,373 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:36,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:29:36,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:36,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:36,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 20:29:36,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4674 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:39,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4674 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:46,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840511759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:46,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:46,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 173 [2022-04-06 20:29:46,340 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400574501] [2022-04-06 20:29:46,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400574501] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:46,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:46,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:29:46,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199411475] [2022-04-06 20:29:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:46,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:29:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:29:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3532, Invalid=26224, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:29:46,342 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:52,427 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-04-06 20:29:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:29:52,427 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 20:29:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:52,428 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:29:52,428 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:29:52,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 245 SyntacticMatches, 3 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3866, Invalid=48346, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:29:52,430 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9458 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 9571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:52,430 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 284 Invalid, 9571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9458 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:29:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:29:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-04-06 20:29:52,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-04-06 20:29:52,462 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 179 [2022-04-06 20:29:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:52,462 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-04-06 20:29:52,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-04-06 20:29:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 20:29:52,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:52,463 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:52,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:52,675 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:52,675 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:52,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 463063053, now seen corresponding path program 107 times [2022-04-06 20:29:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574013485] [2022-04-06 20:29:52,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:52,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash 463063053, now seen corresponding path program 108 times [2022-04-06 20:29:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471452420] [2022-04-06 20:29:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:54,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:54,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471452420] [2022-04-06 20:29:54,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471452420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568085246] [2022-04-06 20:29:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:54,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:54,066 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:54,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:29:54,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:29:54,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:29:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2022-04-06 20:29:54,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 278 proven. 2 refuted. 0 times theorem prover too weak. 4565 trivial. 0 not checked. [2022-04-06 20:29:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568085246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:54,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:54,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 5, 5] total 66 [2022-04-06 20:29:54,851 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574013485] [2022-04-06 20:29:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574013485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:54,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:54,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:29:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489425060] [2022-04-06 20:29:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:54,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:29:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:29:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=3759, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:29:54,852 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:58,865 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-04-06 20:29:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:29:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-04-06 20:29:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:58,866 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:29:58,866 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:29:58,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1208, Invalid=13798, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:29:58,867 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9516 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 9631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:58,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 54 Invalid, 9631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9516 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:29:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:29:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-04-06 20:29:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-04-06 20:29:58,904 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 182 [2022-04-06 20:29:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:58,904 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-04-06 20:29:58,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-04-06 20:29:58,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:29:58,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:58,905 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:58,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:29:59,108 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:29:59,109 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:59,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:59,109 INFO L85 PathProgramCache]: Analyzing trace with hash 134317893, now seen corresponding path program 109 times [2022-04-06 20:29:59,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:59,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746642157] [2022-04-06 20:29:59,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:59,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 134317893, now seen corresponding path program 110 times [2022-04-06 20:29:59,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:59,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267189964] [2022-04-06 20:29:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:00,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 115 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267189964] [2022-04-06 20:30:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267189964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183494829] [2022-04-06 20:30:00,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:00,455 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:00,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:30:00,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:00,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:30:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5015 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:03,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:10,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 5015 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:10,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183494829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:10,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:10,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62, 62] total 179 [2022-04-06 20:30:10,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:10,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746642157] [2022-04-06 20:30:10,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746642157] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:10,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:10,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:30:10,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961086767] [2022-04-06 20:30:10,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:10,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:30:10,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:10,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:30:10,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3774, Invalid=28088, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:30:10,476 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:16,977 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2022-04-06 20:30:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:30:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 20:30:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:16,978 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:30:16,978 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:30:16,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 253 SyntacticMatches, 3 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=4120, Invalid=51812, Unknown=0, NotChecked=0, Total=55932 [2022-04-06 20:30:16,980 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 9880 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 9997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:16,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 74 Invalid, 9997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9880 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:30:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:30:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-04-06 20:30:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-04-06 20:30:17,013 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 185 [2022-04-06 20:30:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:17,014 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-04-06 20:30:17,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-04-06 20:30:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 20:30:17,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:17,014 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:17,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:30:17,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:30:17,215 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:17,215 INFO L85 PathProgramCache]: Analyzing trace with hash -987308787, now seen corresponding path program 111 times [2022-04-06 20:30:17,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134873239] [2022-04-06 20:30:17,217 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:17,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash -987308787, now seen corresponding path program 112 times [2022-04-06 20:30:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157183493] [2022-04-06 20:30:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:18,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:18,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 117 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157183493] [2022-04-06 20:30:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157183493] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:18,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118995326] [2022-04-06 20:30:18,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:18,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:18,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:18,620 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:18,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:30:18,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:18,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 20:30:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:22,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118995326] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:28,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 63, 63] total 182 [2022-04-06 20:30:28,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:28,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134873239] [2022-04-06 20:30:28,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134873239] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:28,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:28,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:30:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262712813] [2022-04-06 20:30:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:28,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:30:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:30:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3898, Invalid=29044, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 20:30:28,936 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:35,582 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-04-06 20:30:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:30:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-04-06 20:30:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:35,583 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:30:35,583 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:30:35,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4250, Invalid=53590, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:30:35,586 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 10262 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 10381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:35,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 104 Invalid, 10381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10262 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:30:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:30:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-04-06 20:30:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-04-06 20:30:35,621 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2022-04-06 20:30:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:35,621 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-04-06 20:30:35,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-04-06 20:30:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:30:35,622 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:35,622 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:35,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:35,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:35,823 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:35,823 INFO L85 PathProgramCache]: Analyzing trace with hash -522169787, now seen corresponding path program 113 times [2022-04-06 20:30:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:35,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1928620439] [2022-04-06 20:30:35,824 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:35,824 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash -522169787, now seen corresponding path program 114 times [2022-04-06 20:30:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:35,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255345053] [2022-04-06 20:30:35,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:37,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:37,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255345053] [2022-04-06 20:30:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255345053] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418410975] [2022-04-06 20:30:37,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:37,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:37,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:37,297 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:37,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:30:37,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:30:37,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:30:37,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 5075 trivial. 0 not checked. [2022-04-06 20:30:37,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 293 proven. 2 refuted. 0 times theorem prover too weak. 5075 trivial. 0 not checked. [2022-04-06 20:30:37,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418410975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:37,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 5, 5] total 69 [2022-04-06 20:30:37,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:37,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1928620439] [2022-04-06 20:30:37,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1928620439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:37,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:37,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:30:37,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773274450] [2022-04-06 20:30:37,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:37,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:30:37,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:30:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=4134, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:30:37,968 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:42,464 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2022-04-06 20:30:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:30:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 20:30:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:42,465 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:30:42,465 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 20:30:42,466 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1271, Invalid=15241, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:30:42,466 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10518 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 10639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 10518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:42,466 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 24 Invalid, 10639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 10518 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:30:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 20:30:42,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-04-06 20:30:42,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-04-06 20:30:42,516 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 191 [2022-04-06 20:30:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:42,516 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-04-06 20:30:42,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-04-06 20:30:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 20:30:42,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:42,518 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:42,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:42,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:42,731 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:42,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 869282317, now seen corresponding path program 115 times [2022-04-06 20:30:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:42,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [363959234] [2022-04-06 20:30:42,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:42,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash 869282317, now seen corresponding path program 116 times [2022-04-06 20:30:42,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:42,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224797625] [2022-04-06 20:30:42,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 121 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:44,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:44,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224797625] [2022-04-06 20:30:44,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224797625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:44,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322210177] [2022-04-06 20:30:44,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:44,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:44,230 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:44,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:30:44,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 20:30:44,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5549 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:48,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 5549 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:55,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322210177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:55,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:55,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 65, 65] total 188 [2022-04-06 20:30:55,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [363959234] [2022-04-06 20:30:55,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [363959234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:55,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:55,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:30:55,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917203890] [2022-04-06 20:30:55,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:55,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:30:55,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:30:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4152, Invalid=31004, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 20:30:55,078 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:02,221 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2022-04-06 20:31:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:31:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-04-06 20:31:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:02,222 INFO L225 Difference]: With dead ends: 209 [2022-04-06 20:31:02,222 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 20:31:02,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=4516, Invalid=57236, Unknown=0, NotChecked=0, Total=61752 [2022-04-06 20:31:02,225 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 11152 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 11275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 11152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:02,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 254 Invalid, 11275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 11152 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:31:02,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 20:31:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-04-06 20:31:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-04-06 20:31:02,276 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 194 [2022-04-06 20:31:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:02,276 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-04-06 20:31:02,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-04-06 20:31:02,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:31:02,277 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:02,277 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:02,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:02,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:02,491 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1405428411, now seen corresponding path program 117 times [2022-04-06 20:31:02,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:02,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880253457] [2022-04-06 20:31:02,493 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:02,493 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1405428411, now seen corresponding path program 118 times [2022-04-06 20:31:02,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:02,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147858636] [2022-04-06 20:31:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:04,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 123 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147858636] [2022-04-06 20:31:04,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147858636] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496044910] [2022-04-06 20:31:04,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:04,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:04,032 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:04,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:31:04,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:04,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 129 conjunts are in the unsatisfiable core [2022-04-06 20:31:04,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5733 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:07,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:15,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5733 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:15,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496044910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:15,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:15,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66, 66] total 191 [2022-04-06 20:31:15,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:15,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880253457] [2022-04-06 20:31:15,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880253457] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:15,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:15,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:31:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469836807] [2022-04-06 20:31:15,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:15,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:31:15,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:15,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:31:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4282, Invalid=32008, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 20:31:15,351 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:22,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:22,681 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2022-04-06 20:31:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:31:22,682 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 20:31:22,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:22,683 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:31:22,683 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:31:22,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 269 SyntacticMatches, 3 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=4652, Invalid=59104, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 20:31:22,685 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 11522 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 11647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 11522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:22,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 259 Invalid, 11647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 11522 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:31:22,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:31:22,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-04-06 20:31:22,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-04-06 20:31:22,726 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 197 [2022-04-06 20:31:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:22,726 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-04-06 20:31:22,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-04-06 20:31:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-04-06 20:31:22,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:22,727 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:22,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:22,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:22,940 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:22,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1318729971, now seen corresponding path program 119 times [2022-04-06 20:31:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:22,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748535456] [2022-04-06 20:31:22,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:22,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1318729971, now seen corresponding path program 120 times [2022-04-06 20:31:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:22,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843715276] [2022-04-06 20:31:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:24,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:24,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 125 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:24,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:24,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843715276] [2022-04-06 20:31:24,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843715276] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:24,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506181714] [2022-04-06 20:31:24,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:24,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:24,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:24,612 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:24,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:31:24,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:31:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:31:24,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 308 proven. 2 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2022-04-06 20:31:25,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 308 proven. 2 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2022-04-06 20:31:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506181714] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:25,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:25,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 5, 5] total 72 [2022-04-06 20:31:25,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:25,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748535456] [2022-04-06 20:31:25,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748535456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:25,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:25,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:31:25,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079481304] [2022-04-06 20:31:25,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:25,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:31:25,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:25,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:31:25,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=4527, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:31:25,378 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:30,337 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2022-04-06 20:31:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:31:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-04-06 20:31:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:30,339 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:31:30,339 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 20:31:30,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1334, Invalid=16756, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:31:30,340 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 11976 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 12103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 11976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:30,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 329 Invalid, 12103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 11976 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:31:30,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 20:31:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-04-06 20:31:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-04-06 20:31:30,378 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2022-04-06 20:31:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:30,378 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-04-06 20:31:30,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:30,378 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-04-06 20:31:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:31:30,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:30,379 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:30,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:30,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:31:30,585 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 239151173, now seen corresponding path program 121 times [2022-04-06 20:31:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:30,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078383172] [2022-04-06 20:31:30,586 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:30,586 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 239151173, now seen corresponding path program 122 times [2022-04-06 20:31:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466328339] [2022-04-06 20:31:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 127 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:32,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:32,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466328339] [2022-04-06 20:31:32,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466328339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:32,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68930886] [2022-04-06 20:31:32,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:32,233 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:32,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:31:32,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:31:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 6110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68930886] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:44,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 197 [2022-04-06 20:31:44,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:44,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078383172] [2022-04-06 20:31:44,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078383172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:44,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:44,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:31:44,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704783900] [2022-04-06 20:31:44,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:44,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:31:44,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:44,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:31:44,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4548, Invalid=34064, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:31:44,175 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:52,564 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-04-06 20:31:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:31:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 20:31:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:52,565 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:31:52,565 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 20:31:52,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=4930, Invalid=62930, Unknown=0, NotChecked=0, Total=67860 [2022-04-06 20:31:52,567 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 12184 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 12313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 12184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:52,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 189 Invalid, 12313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 12184 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:31:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 20:31:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-04-06 20:31:52,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2022-04-06 20:31:52,607 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 203 [2022-04-06 20:31:52,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:52,607 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2022-04-06 20:31:52,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2022-04-06 20:31:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 20:31:52,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:52,608 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:52,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:52,808 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:52,808 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:52,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:52,809 INFO L85 PathProgramCache]: Analyzing trace with hash -340288499, now seen corresponding path program 123 times [2022-04-06 20:31:52,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:52,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933554515] [2022-04-06 20:31:52,810 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:52,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash -340288499, now seen corresponding path program 124 times [2022-04-06 20:31:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:52,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954087400] [2022-04-06 20:31:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:52,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:54,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:54,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:54,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954087400] [2022-04-06 20:31:54,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954087400] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:54,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971916009] [2022-04-06 20:31:54,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:54,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:54,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:54,595 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:54,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:31:54,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:54,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:54,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 135 conjunts are in the unsatisfiable core [2022-04-06 20:31:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:58,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6303 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:58,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6303 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971916009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:06,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:06,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 69, 69] total 200 [2022-04-06 20:32:06,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:06,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933554515] [2022-04-06 20:32:06,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933554515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:06,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:06,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:32:06,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361808153] [2022-04-06 20:32:06,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:06,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:32:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:06,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:32:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4684, Invalid=35116, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 20:32:06,836 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:15,056 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2022-04-06 20:32:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:32:15,057 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-04-06 20:32:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:15,057 INFO L225 Difference]: With dead ends: 221 [2022-04-06 20:32:15,057 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 20:32:15,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=5072, Invalid=64888, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:32:15,060 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 12686 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 12817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 12686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:15,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 289 Invalid, 12817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 12686 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:32:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 20:32:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-04-06 20:32:15,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-04-06 20:32:15,110 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 206 [2022-04-06 20:32:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:15,110 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-04-06 20:32:15,110 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-04-06 20:32:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:32:15,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:15,111 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:15,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:15,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:32:15,325 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash -953994427, now seen corresponding path program 125 times [2022-04-06 20:32:15,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:15,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968117264] [2022-04-06 20:32:15,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:15,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash -953994427, now seen corresponding path program 126 times [2022-04-06 20:32:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:15,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173916224] [2022-04-06 20:32:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:15,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:17,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173916224] [2022-04-06 20:32:17,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173916224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231051224] [2022-04-06 20:32:17,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:17,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:17,058 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:17,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:32:17,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:32:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:17,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:32:17,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 6176 trivial. 0 not checked. [2022-04-06 20:32:17,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 323 proven. 2 refuted. 0 times theorem prover too weak. 6176 trivial. 0 not checked. [2022-04-06 20:32:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231051224] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:17,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 5, 5] total 75 [2022-04-06 20:32:17,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:17,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968117264] [2022-04-06 20:32:17,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968117264] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:17,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:17,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:32:17,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147278703] [2022-04-06 20:32:17,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:17,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:32:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:17,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:32:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=4938, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:32:17,783 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:23,085 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2022-04-06 20:32:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:32:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-04-06 20:32:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:23,086 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:32:23,086 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 20:32:23,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 415 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1397, Invalid=18343, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:32:23,087 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12768 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 12768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:23,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 34 Invalid, 12901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 12768 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:32:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 20:32:23,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-04-06 20:32:23,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-04-06 20:32:23,130 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 209 [2022-04-06 20:32:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:23,130 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-04-06 20:32:23,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-04-06 20:32:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-06 20:32:23,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:23,131 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:23,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:23,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:32:23,338 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:23,338 INFO L85 PathProgramCache]: Analyzing trace with hash -191516403, now seen corresponding path program 127 times [2022-04-06 20:32:23,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:23,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1363556910] [2022-04-06 20:32:23,339 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:23,339 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:23,340 INFO L85 PathProgramCache]: Analyzing trace with hash -191516403, now seen corresponding path program 128 times [2022-04-06 20:32:23,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:23,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621648742] [2022-04-06 20:32:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:25,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 133 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:25,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621648742] [2022-04-06 20:32:25,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621648742] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:25,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905535902] [2022-04-06 20:32:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:25,215 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:25,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:32:25,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 20:32:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6698 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 6698 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:38,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905535902] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:38,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 71, 71] total 206 [2022-04-06 20:32:38,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1363556910] [2022-04-06 20:32:38,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1363556910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:38,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:32:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418933486] [2022-04-06 20:32:38,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:38,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:32:38,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:32:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4962, Invalid=37268, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 20:32:38,183 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:46,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:46,743 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2022-04-06 20:32:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:32:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-04-06 20:32:46,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:46,744 INFO L225 Difference]: With dead ends: 227 [2022-04-06 20:32:46,744 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 20:32:46,746 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 289 SyntacticMatches, 3 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=5362, Invalid=68894, Unknown=0, NotChecked=0, Total=74256 [2022-04-06 20:32:46,746 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13180 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 13315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 13180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:46,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 49 Invalid, 13315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 13180 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 20:32:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 20:32:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-04-06 20:32:46,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-04-06 20:32:46,789 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2022-04-06 20:32:46,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:46,789 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-04-06 20:32:46,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-04-06 20:32:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:32:46,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:46,790 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:46,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:32:46,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:32:46,999 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:47,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1290731963, now seen corresponding path program 129 times [2022-04-06 20:32:47,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:47,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747074960] [2022-04-06 20:32:47,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:47,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:47,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1290731963, now seen corresponding path program 130 times [2022-04-06 20:32:47,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411694794] [2022-04-06 20:32:47,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:47,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411694794] [2022-04-06 20:32:48,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411694794] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:48,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077665116] [2022-04-06 20:32:48,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:48,813 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:48,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:32:48,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:48,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:48,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 141 conjunts are in the unsatisfiable core [2022-04-06 20:32:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:53,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:02,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077665116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:02,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:02,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 72, 72] total 209 [2022-04-06 20:33:02,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:02,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747074960] [2022-04-06 20:33:02,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747074960] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:02,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:02,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:33:02,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542943311] [2022-04-06 20:33:02,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:02,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:33:02,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:33:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5104, Invalid=38368, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:33:02,366 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:11,287 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-04-06 20:33:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:33:11,287 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-04-06 20:33:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:11,288 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:33:11,288 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 20:33:11,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=5510, Invalid=70942, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:33:11,291 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 13844 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 13981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 13844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:11,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 269 Invalid, 13981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 13844 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:33:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 20:33:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-04-06 20:33:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:11,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2022-04-06 20:33:11,343 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 215 [2022-04-06 20:33:11,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:11,343 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2022-04-06 20:33:11,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2022-04-06 20:33:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-04-06 20:33:11,344 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:11,344 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:11,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:11,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:33:11,559 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:11,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1104152077, now seen corresponding path program 131 times [2022-04-06 20:33:11,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:11,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1692657033] [2022-04-06 20:33:11,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:11,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1104152077, now seen corresponding path program 132 times [2022-04-06 20:33:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:11,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627334286] [2022-04-06 20:33:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:11,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:13,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627334286] [2022-04-06 20:33:13,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627334286] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:13,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091229459] [2022-04-06 20:33:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:13,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:13,489 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:13,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:33:13,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:33:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:33:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 6767 trivial. 0 not checked. [2022-04-06 20:33:13,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 338 proven. 2 refuted. 0 times theorem prover too weak. 6767 trivial. 0 not checked. [2022-04-06 20:33:14,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091229459] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:14,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:14,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 5, 5] total 78 [2022-04-06 20:33:14,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:14,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1692657033] [2022-04-06 20:33:14,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1692657033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:14,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:14,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:33:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916590520] [2022-04-06 20:33:14,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:14,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:33:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:33:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=5367, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:33:14,252 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:19,971 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2022-04-06 20:33:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:33:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-04-06 20:33:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:19,972 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:33:19,972 INFO L226 Difference]: Without dead ends: 223 [2022-04-06 20:33:19,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 433 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1460, Invalid=20002, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:33:19,973 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 216 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 14094 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 14233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 14094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:19,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 139 Invalid, 14233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 14094 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:33:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-04-06 20:33:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-04-06 20:33:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2022-04-06 20:33:20,019 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 218 [2022-04-06 20:33:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:20,020 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2022-04-06 20:33:20,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2022-04-06 20:33:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:33:20,020 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:20,020 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:20,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 20:33:20,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:20,221 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash -902133435, now seen corresponding path program 133 times [2022-04-06 20:33:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:20,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1078458383] [2022-04-06 20:33:20,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:20,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:20,223 INFO L85 PathProgramCache]: Analyzing trace with hash -902133435, now seen corresponding path program 134 times [2022-04-06 20:33:20,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:20,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531163712] [2022-04-06 20:33:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:22,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:22,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:22,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531163712] [2022-04-06 20:33:22,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531163712] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:22,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037007868] [2022-04-06 20:33:22,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:22,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:22,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:22,128 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:22,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:33:22,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-06 20:33:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7313 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:27,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 7313 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037007868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:36,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74, 74] total 215 [2022-04-06 20:33:36,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1078458383] [2022-04-06 20:33:36,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1078458383] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:36,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:36,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:33:36,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002003901] [2022-04-06 20:33:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:36,245 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:33:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:36,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:33:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5394, Invalid=40616, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 20:33:36,247 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:45,745 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2022-04-06 20:33:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:33:45,745 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-04-06 20:33:45,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:45,746 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:33:45,746 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:33:45,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=5812, Invalid=75128, Unknown=0, NotChecked=0, Total=80940 [2022-04-06 20:33:45,750 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 14638 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 14779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 14638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:45,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 249 Invalid, 14779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 14638 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:33:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:33:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-04-06 20:33:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-04-06 20:33:45,816 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 221 [2022-04-06 20:33:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:45,816 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-04-06 20:33:45,817 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-04-06 20:33:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-06 20:33:45,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:45,818 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:45,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:46,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:46,029 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1388930291, now seen corresponding path program 135 times [2022-04-06 20:33:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:46,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050599789] [2022-04-06 20:33:46,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:46,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:46,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1388930291, now seen corresponding path program 136 times [2022-04-06 20:33:46,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:46,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113264059] [2022-04-06 20:33:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:46,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 141 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113264059] [2022-04-06 20:33:48,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113264059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:48,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151928451] [2022-04-06 20:33:48,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:48,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:48,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:48,019 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:48,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:33:48,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:48,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:48,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 147 conjunts are in the unsatisfiable core [2022-04-06 20:33:48,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7524 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:53,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7524 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:03,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151928451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:03,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 75, 75] total 218 [2022-04-06 20:34:03,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:03,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2050599789] [2022-04-06 20:34:03,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2050599789] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:03,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:03,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:34:03,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690395195] [2022-04-06 20:34:03,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:03,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:34:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:03,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:34:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5542, Invalid=41764, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 20:34:03,108 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:12,718 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2022-04-06 20:34:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:34:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-04-06 20:34:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:12,719 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:34:12,719 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 20:34:12,722 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=5966, Invalid=77266, Unknown=0, NotChecked=0, Total=83232 [2022-04-06 20:34:12,722 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 14858 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 15001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 14858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:12,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 84 Invalid, 15001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 14858 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:34:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 20:34:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-04-06 20:34:12,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2022-04-06 20:34:12,789 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2022-04-06 20:34:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:12,790 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2022-04-06 20:34:12,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2022-04-06 20:34:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:34:12,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:12,791 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:12,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:13,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:13,003 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:13,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 550491205, now seen corresponding path program 137 times [2022-04-06 20:34:13,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:13,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638456927] [2022-04-06 20:34:13,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:13,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 550491205, now seen corresponding path program 138 times [2022-04-06 20:34:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:13,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082817773] [2022-04-06 20:34:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:15,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:15,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082817773] [2022-04-06 20:34:15,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082817773] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:15,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527064046] [2022-04-06 20:34:15,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:15,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:15,013 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:15,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:34:15,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:34:15,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:34:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2022-04-06 20:34:15,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 353 proven. 2 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2022-04-06 20:34:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527064046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:15,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 5, 5] total 81 [2022-04-06 20:34:15,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638456927] [2022-04-06 20:34:15,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638456927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:15,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:15,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:34:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502581142] [2022-04-06 20:34:15,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:15,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:34:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:34:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=5814, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:34:15,820 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:22,140 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-04-06 20:34:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:34:22,141 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-04-06 20:34:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:22,141 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:34:22,141 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:34:22,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1523, Invalid=21733, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:34:22,142 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 15546 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 15691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 15546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:22,142 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 304 Invalid, 15691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 15546 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 20:34:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:34:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-04-06 20:34:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:22,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-04-06 20:34:22,192 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 227 [2022-04-06 20:34:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:22,192 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-04-06 20:34:22,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-04-06 20:34:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-04-06 20:34:22,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:22,193 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:22,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 20:34:22,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 20:34:22,409 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1956212749, now seen corresponding path program 139 times [2022-04-06 20:34:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:22,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183449076] [2022-04-06 20:34:22,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:22,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1956212749, now seen corresponding path program 140 times [2022-04-06 20:34:22,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:22,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966794479] [2022-04-06 20:34:22,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:22,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 145 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:24,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966794479] [2022-04-06 20:34:24,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966794479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274864304] [2022-04-06 20:34:24,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:24,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:24,556 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:24,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:34:24,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:24,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 151 conjunts are in the unsatisfiable core [2022-04-06 20:34:24,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7955 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:29,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 7955 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:39,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274864304] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:39,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:39,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 77, 77] total 224 [2022-04-06 20:34:39,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183449076] [2022-04-06 20:34:39,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183449076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:39,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:39,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:34:39,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504511953] [2022-04-06 20:34:39,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:39,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:34:39,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:39,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:34:39,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5844, Invalid=44108, Unknown=0, NotChecked=0, Total=49952 [2022-04-06 20:34:39,869 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:49,934 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2022-04-06 20:34:49,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:34:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-04-06 20:34:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:49,935 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:34:49,935 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 20:34:49,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 313 SyntacticMatches, 3 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=6280, Invalid=81632, Unknown=0, NotChecked=0, Total=87912 [2022-04-06 20:34:49,939 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15682 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 15682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:49,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 59 Invalid, 15829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 15682 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 20:34:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 20:34:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-04-06 20:34:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2022-04-06 20:34:50,001 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 230 [2022-04-06 20:34:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:50,001 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2022-04-06 20:34:50,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2022-04-06 20:34:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:34:50,002 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:50,002 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:50,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 20:34:50,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:50,203 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:50,203 INFO L85 PathProgramCache]: Analyzing trace with hash -419373243, now seen corresponding path program 141 times [2022-04-06 20:34:50,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:50,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2103533190] [2022-04-06 20:34:50,205 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:50,205 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash -419373243, now seen corresponding path program 142 times [2022-04-06 20:34:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:50,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346106656] [2022-04-06 20:34:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346106656] [2022-04-06 20:34:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346106656] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905912857] [2022-04-06 20:34:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:52,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:52,295 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:52,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:34:52,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:52,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 153 conjunts are in the unsatisfiable core [2022-04-06 20:34:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8175 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:57,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:07,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8175 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:07,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905912857] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:07,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:07,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 78, 78] total 227 [2022-04-06 20:35:07,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:07,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2103533190] [2022-04-06 20:35:07,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2103533190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:07,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:07,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:35:07,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911257812] [2022-04-06 20:35:07,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:07,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:35:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:07,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:35:07,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5998, Invalid=45304, Unknown=0, NotChecked=0, Total=51302 [2022-04-06 20:35:07,974 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:18,394 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2022-04-06 20:35:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:35:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-04-06 20:35:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:18,396 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:35:18,396 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:35:18,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 317 SyntacticMatches, 3 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=6440, Invalid=83860, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:35:18,399 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 16124 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 16273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 16124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:18,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 64 Invalid, 16273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 16124 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:35:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:35:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-04-06 20:35:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2022-04-06 20:35:18,474 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 233 [2022-04-06 20:35:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:18,474 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2022-04-06 20:35:18,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2022-04-06 20:35:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-04-06 20:35:18,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:18,475 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:18,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:18,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:18,690 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:18,690 INFO L85 PathProgramCache]: Analyzing trace with hash 969442573, now seen corresponding path program 143 times [2022-04-06 20:35:18,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005349097] [2022-04-06 20:35:18,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:18,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash 969442573, now seen corresponding path program 144 times [2022-04-06 20:35:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:18,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603764594] [2022-04-06 20:35:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:18,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:20,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603764594] [2022-04-06 20:35:20,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603764594] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:20,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571308128] [2022-04-06 20:35:20,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:20,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:20,861 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:20,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:35:20,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:35:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:35:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2022-04-06 20:35:21,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 368 proven. 2 refuted. 0 times theorem prover too weak. 8030 trivial. 0 not checked. [2022-04-06 20:35:21,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571308128] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:21,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:21,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 6, 6] total 86 [2022-04-06 20:35:21,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005349097] [2022-04-06 20:35:21,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005349097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:21,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:21,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:35:21,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517315796] [2022-04-06 20:35:21,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:21,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:35:21,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:21,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:35:21,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=6601, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:35:21,962 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:28,960 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2022-04-06 20:35:28,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:35:28,961 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-04-06 20:35:28,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:28,961 INFO L225 Difference]: With dead ends: 251 [2022-04-06 20:35:28,962 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 20:35:28,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 467 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1605, Invalid=24155, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:35:28,963 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 16926 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 17077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 16926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:28,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 364 Invalid, 17077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 16926 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 20:35:28,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 20:35:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-04-06 20:35:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2022-04-06 20:35:29,026 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2022-04-06 20:35:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:29,026 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2022-04-06 20:35:29,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:29,026 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2022-04-06 20:35:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:35:29,027 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:29,027 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:29,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:35:29,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:35:29,228 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:29,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1761454661, now seen corresponding path program 145 times [2022-04-06 20:35:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925004071] [2022-04-06 20:35:29,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:29,229 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1761454661, now seen corresponding path program 146 times [2022-04-06 20:35:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:29,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144264937] [2022-04-06 20:35:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:31,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 151 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144264937] [2022-04-06 20:35:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144264937] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:31,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915377346] [2022-04-06 20:35:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:31,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:31,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:31,411 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:35:31,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:31,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 157 conjunts are in the unsatisfiable core [2022-04-06 20:35:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8624 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:37,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 8624 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:47,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915377346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:47,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:47,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 80, 80] total 233 [2022-04-06 20:35:47,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925004071] [2022-04-06 20:35:47,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925004071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:47,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:47,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:35:47,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632433750] [2022-04-06 20:35:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:47,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:35:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:35:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6312, Invalid=47744, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 20:35:47,961 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:59,253 INFO L93 Difference]: Finished difference Result 254 states and 257 transitions. [2022-04-06 20:35:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:35:59,253 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-04-06 20:35:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:59,254 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:35:59,254 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 20:35:59,258 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 325 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=6766, Invalid=88406, Unknown=0, NotChecked=0, Total=95172 [2022-04-06 20:35:59,258 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 17206 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 17359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 17206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:59,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 224 Invalid, 17359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 17206 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 20:35:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 20:35:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-04-06 20:35:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2022-04-06 20:35:59,327 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 239 [2022-04-06 20:35:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:59,327 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2022-04-06 20:35:59,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2022-04-06 20:35:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-04-06 20:35:59,328 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:59,328 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:59,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:35:59,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:35:59,546 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash 43244045, now seen corresponding path program 147 times [2022-04-06 20:35:59,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1189675112] [2022-04-06 20:35:59,548 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:59,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:59,548 INFO L85 PathProgramCache]: Analyzing trace with hash 43244045, now seen corresponding path program 148 times [2022-04-06 20:35:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:59,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537211654] [2022-04-06 20:35:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:02,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 153 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537211654] [2022-04-06 20:36:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537211654] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038582692] [2022-04-06 20:36:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:02,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:02,120 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:02,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:36:02,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 159 conjunts are in the unsatisfiable core [2022-04-06 20:36:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8853 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:07,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:18,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8853 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038582692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:18,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:18,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 81, 81] total 236 [2022-04-06 20:36:18,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:18,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1189675112] [2022-04-06 20:36:18,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1189675112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:18,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:18,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:36:18,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786178100] [2022-04-06 20:36:18,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:18,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:36:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:36:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6472, Invalid=48988, Unknown=0, NotChecked=0, Total=55460 [2022-04-06 20:36:18,971 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:30,272 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2022-04-06 20:36:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:36:30,272 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-04-06 20:36:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:30,273 INFO L225 Difference]: With dead ends: 257 [2022-04-06 20:36:30,273 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 20:36:30,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 329 SyntacticMatches, 3 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3086 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=6932, Invalid=90724, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 20:36:30,276 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 17516 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 17671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 17516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:30,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 104 Invalid, 17671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 17516 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 20:36:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 20:36:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-04-06 20:36:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2022-04-06 20:36:30,340 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 242 [2022-04-06 20:36:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:30,340 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2022-04-06 20:36:30,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2022-04-06 20:36:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:36:30,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:30,341 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:30,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:36:30,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:30,541 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:30,541 INFO L85 PathProgramCache]: Analyzing trace with hash 251016517, now seen corresponding path program 149 times [2022-04-06 20:36:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:30,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [191756027] [2022-04-06 20:36:30,543 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:30,543 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash 251016517, now seen corresponding path program 150 times [2022-04-06 20:36:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:30,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761948698] [2022-04-06 20:36:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:32,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 155 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:32,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:32,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761948698] [2022-04-06 20:36:32,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761948698] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:32,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374664404] [2022-04-06 20:36:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:32,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:32,840 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:32,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:36:32,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:36:32,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:32,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:36:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 383 proven. 2 refuted. 0 times theorem prover too weak. 8702 trivial. 0 not checked. [2022-04-06 20:36:33,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 383 proven. 2 refuted. 0 times theorem prover too weak. 8702 trivial. 0 not checked. [2022-04-06 20:36:33,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374664404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:33,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:33,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 5, 5] total 87 [2022-04-06 20:36:33,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [191756027] [2022-04-06 20:36:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [191756027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:33,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:36:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427409498] [2022-04-06 20:36:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:33,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:36:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:36:33,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=6762, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:36:33,677 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:41,074 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2022-04-06 20:36:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:36:41,074 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-04-06 20:36:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:41,075 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:36:41,075 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 20:36:41,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3009 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1649, Invalid=25411, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:36:41,076 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 18252 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 18409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 18252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:41,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 334 Invalid, 18409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 18252 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-06 20:36:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 20:36:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-04-06 20:36:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-04-06 20:36:41,131 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 245 [2022-04-06 20:36:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:41,131 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-04-06 20:36:41,132 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-04-06 20:36:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-04-06 20:36:41,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:41,132 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:41,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:41,333 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:41,334 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash 952856333, now seen corresponding path program 151 times [2022-04-06 20:36:41,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:41,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1585161721] [2022-04-06 20:36:41,335 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:41,335 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 952856333, now seen corresponding path program 152 times [2022-04-06 20:36:41,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074632517] [2022-04-06 20:36:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:43,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074632517] [2022-04-06 20:36:43,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074632517] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:43,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171678146] [2022-04-06 20:36:43,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:43,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:43,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:43,728 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:43,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:36:43,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:43,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 20:36:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates...