/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/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:45:06,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:45:06,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:45:06,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:45:06,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:45:06,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:45:06,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:45:06,470 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 20:45:06,478 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:45:06,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:45:06,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:45:06,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:45:06,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:45:06,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:45:06,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:45:06,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:45:06,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:45:06,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:45:06,481 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:45:06,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:45:06,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:45:06,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:45:06,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:45:06,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:45:06,682 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:45:06,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-04-06 20:45:06,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f56f1e8/29db1131c3194ab2ac9270d977f53d7e/FLAGbb9e51124 [2022-04-06 20:45:07,086 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:45:07,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-04-06 20:45:07,090 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f56f1e8/29db1131c3194ab2ac9270d977f53d7e/FLAGbb9e51124 [2022-04-06 20:45:07,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f56f1e8/29db1131c3194ab2ac9270d977f53d7e [2022-04-06 20:45:07,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:45:07,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:45:07,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:45:07,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:45:07,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:45:07,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34ca4de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07, skipping insertion in model container [2022-04-06 20:45:07,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:45:07,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:45:07,709 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/mono-crafted_6.c[318,331] [2022-04-06 20:45:07,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:45:07,721 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:45:07,728 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/mono-crafted_6.c[318,331] [2022-04-06 20:45:07,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:45:07,741 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:45:07,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07 WrapperNode [2022-04-06 20:45:07,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:45:07,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:45:07,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:45:07,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:45:07,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:45:07,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:45:07,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:45:07,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:45:07,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (1/1) ... [2022-04-06 20:45:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:45:07,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:07,808 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 20:45:07,839 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 20:45:07,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:45:07,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:45:07,848 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:45:07,848 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:45:07,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:45:07,848 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:45:07,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:45:07,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:45:07,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:45:07,851 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:45:07,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:45:07,898 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:45:07,899 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:45:08,007 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:45:08,010 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:45:08,010 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:45:08,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:45:08 BoogieIcfgContainer [2022-04-06 20:45:08,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:45:08,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:45:08,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:45:08,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:45:08,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:45:07" (1/3) ... [2022-04-06 20:45:08,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da3210c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:45:08, skipping insertion in model container [2022-04-06 20:45:08,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:45:07" (2/3) ... [2022-04-06 20:45:08,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da3210c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:45:08, skipping insertion in model container [2022-04-06 20:45:08,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:45:08" (3/3) ... [2022-04-06 20:45:08,025 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-04-06 20:45:08,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:45:08,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:45:08,070 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:45:08,079 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 20:45:08,080 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:45:08,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 20:45:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:45:08,105 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,105 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,106 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:08,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 1 times [2022-04-06 20:45:08,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1125927230] [2022-04-06 20:45:08,122 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:45:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 2 times [2022-04-06 20:45:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:08,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988517563] [2022-04-06 20:45:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:08,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:08,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988517563] [2022-04-06 20:45:08,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988517563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:08,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:08,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:08,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1125927230] [2022-04-06 20:45:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1125927230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:08,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899498245] [2022-04-06 20:45:08,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:08,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:45:08,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:45:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:45:08,343 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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 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 20:45:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:08,422 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-04-06 20:45:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:45:08,424 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 20:45:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:08,427 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:45:08,427 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:45:08,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:45:08,431 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:08,432 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:45:08,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 20:45:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 20:45:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:45:08,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 20:45:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:08,465 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:45:08,465 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 20:45:08,466 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:45:08,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:45:08,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,467 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:45:08,468 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:08,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 1 times [2022-04-06 20:45:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917909815] [2022-04-06 20:45:08,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:08,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:08,482 INFO L85 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 2 times [2022-04-06 20:45:08,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:08,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120598555] [2022-04-06 20:45:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:08,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:08,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:08,535 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 20:45:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120598555] [2022-04-06 20:45:08,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120598555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:08,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352729490] [2022-04-06 20:45:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:08,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:08,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:08,541 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 20:45:08,543 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 20:45:08,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:08,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:45:08,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:08,637 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 20:45:08,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:08,740 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 20:45:08,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352729490] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:08,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:08,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2022-04-06 20:45:08,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:08,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917909815] [2022-04-06 20:45:08,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917909815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:08,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:08,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:45:08,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899762634] [2022-04-06 20:45:08,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:08,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:45:08,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:45:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:45:08,743 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 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 20:45:08,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:08,774 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-06 20:45:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:45:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 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 13 [2022-04-06 20:45:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:08,775 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:45:08,776 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:45:08,776 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:45:08,777 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:08,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:45:08,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:45:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 20:45:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 20:45:08,780 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-04-06 20:45:08,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:08,781 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 20:45:08,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 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 20:45:08,781 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 20:45:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:45:08,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:08,781 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:08,800 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 20:45:08,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:08,998 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash -119511132, now seen corresponding path program 3 times [2022-04-06 20:45:08,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:08,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1285613097] [2022-04-06 20:45:09,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:09,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:09,001 INFO L85 PathProgramCache]: Analyzing trace with hash -119511132, now seen corresponding path program 4 times [2022-04-06 20:45:09,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:09,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692631413] [2022-04-06 20:45:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:09,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:45:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692631413] [2022-04-06 20:45:09,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692631413] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:09,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:09,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1285613097] [2022-04-06 20:45:09,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1285613097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:09,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053191255] [2022-04-06 20:45:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:09,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:45:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:45:09,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:45:09,052 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:09,076 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-04-06 20:45:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:45:09,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 20:45:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:09,077 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:45:09,077 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 20:45:09,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:45:09,078 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:09,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 20:45:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 20:45:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 20:45:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 20:45:09,082 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-04-06 20:45:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:09,082 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 20:45:09,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 20:45:09,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:45:09,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:09,083 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:09,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:45:09,083 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1433617413, now seen corresponding path program 1 times [2022-04-06 20:45:09,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60106939] [2022-04-06 20:45:09,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:09,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1433617413, now seen corresponding path program 2 times [2022-04-06 20:45:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846091804] [2022-04-06 20:45:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:45:09,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846091804] [2022-04-06 20:45:09,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846091804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:09,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:09,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60106939] [2022-04-06 20:45:09,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60106939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:45:09,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758012879] [2022-04-06 20:45:09,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:09,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:45:09,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:45:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:45:09,113 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 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 20:45:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:09,137 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-04-06 20:45:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:45:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 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 19 [2022-04-06 20:45:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:09,139 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:45:09,139 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:45:09,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:45:09,140 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:09,140 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:45:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-04-06 20:45:09,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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 20:45:09,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 20:45:09,144 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 19 [2022-04-06 20:45:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:09,144 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 20:45:09,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 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 20:45:09,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 20:45:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:45:09,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:09,145 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:09,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:45:09,145 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1266318508, now seen corresponding path program 1 times [2022-04-06 20:45:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267194652] [2022-04-06 20:45:09,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:09,148 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:09,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1266318508, now seen corresponding path program 2 times [2022-04-06 20:45:09,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:09,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185151283] [2022-04-06 20:45:09,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:09,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185151283] [2022-04-06 20:45:09,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185151283] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:09,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113415626] [2022-04-06 20:45:09,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:09,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:09,191 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 20:45:09,219 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 20:45:09,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:09,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:09,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:09,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113415626] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:09,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:09,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:45:09,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:09,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267194652] [2022-04-06 20:45:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267194652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:45:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275275207] [2022-04-06 20:45:09,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:09,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:45:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:45:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:45:09,356 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:09,434 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-04-06 20:45:09,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:45:09,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:45:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:09,438 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:45:09,438 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:45:09,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:45:09,444 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:09,445 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:45:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 20:45:09,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 20:45:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-06 20:45:09,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2022-04-06 20:45:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:09,450 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-06 20:45:09,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-06 20:45:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:45:09,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:09,450 INFO L499 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:09,472 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 20:45:09,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,651 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1093697905, now seen corresponding path program 3 times [2022-04-06 20:45:09,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [244965103] [2022-04-06 20:45:09,654 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:09,654 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1093697905, now seen corresponding path program 4 times [2022-04-06 20:45:09,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406881297] [2022-04-06 20:45:09,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:09,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:09,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406881297] [2022-04-06 20:45:09,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406881297] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:09,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133203812] [2022-04-06 20:45:09,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:09,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:09,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:09,706 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 20:45:09,707 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 20:45:09,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:09,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:45:09,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:09,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133203812] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:09,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:09,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:45:09,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:09,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [244965103] [2022-04-06 20:45:09,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [244965103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:09,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:09,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:45:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055608359] [2022-04-06 20:45:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:09,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:45:09,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:09,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:45:09,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:45:09,858 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:09,914 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-04-06 20:45:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:45:09,915 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:45:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:09,915 INFO L225 Difference]: With dead ends: 42 [2022-04-06 20:45:09,915 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:45:09,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:45:09,916 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:09,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:45:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 20:45:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 20:45:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-06 20:45:09,920 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 25 [2022-04-06 20:45:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:09,920 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-06 20:45:09,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-06 20:45:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:45:09,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:09,921 INFO L499 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:09,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:10,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:10,144 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1326738510, now seen corresponding path program 5 times [2022-04-06 20:45:10,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048922961] [2022-04-06 20:45:10,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:10,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1326738510, now seen corresponding path program 6 times [2022-04-06 20:45:10,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:10,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227336110] [2022-04-06 20:45:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:10,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:10,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:10,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227336110] [2022-04-06 20:45:10,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227336110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:10,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588733709] [2022-04-06 20:45:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:10,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:10,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:10,191 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 20:45:10,199 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 20:45:10,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:10,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:10,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:45:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588733709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:10,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:10,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:45:10,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:10,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048922961] [2022-04-06 20:45:10,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048922961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:10,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:10,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:45:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409214472] [2022-04-06 20:45:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:10,365 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:45:10,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:45:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:45:10,366 INFO L87 Difference]: Start difference. First operand 28 states and 31 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 20:45:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:10,442 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-04-06 20:45:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:45:10,442 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 27 [2022-04-06 20:45:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:10,443 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:45:10,443 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 20:45:10,443 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:45:10,444 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:10,444 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 37 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 20:45:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 20:45:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 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 20:45:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 20:45:10,448 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 27 [2022-04-06 20:45:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:10,448 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 20:45:10,448 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 20:45:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 20:45:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:45:10,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:10,449 INFO L499 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:10,465 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 20:45:10,664 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:10,664 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1940460523, now seen corresponding path program 7 times [2022-04-06 20:45:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719606985] [2022-04-06 20:45:10,667 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:10,667 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1940460523, now seen corresponding path program 8 times [2022-04-06 20:45:10,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:10,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151797867] [2022-04-06 20:45:10,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:10,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151797867] [2022-04-06 20:45:10,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151797867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900827938] [2022-04-06 20:45:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:10,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:10,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:10,748 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 20:45:10,748 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 20:45:10,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:10,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:10,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900827938] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:10,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:45:10,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719606985] [2022-04-06 20:45:10,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719606985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:45:10,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269701942] [2022-04-06 20:45:10,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:10,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:45:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:45:10,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:45:10,924 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:10,989 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-04-06 20:45:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:45:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:45:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:10,991 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:45:10,991 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:45:10,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:45:10,992 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:10,992 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:45:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 20:45:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 20:45:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-06 20:45:11,001 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2022-04-06 20:45:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:11,002 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-06 20:45:11,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-06 20:45:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:45:11,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:11,005 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:11,021 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 20:45:11,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:11,215 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:11,216 INFO L85 PathProgramCache]: Analyzing trace with hash -978171832, now seen corresponding path program 9 times [2022-04-06 20:45:11,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777724211] [2022-04-06 20:45:11,218 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:11,218 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:11,218 INFO L85 PathProgramCache]: Analyzing trace with hash -978171832, now seen corresponding path program 10 times [2022-04-06 20:45:11,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:11,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825518145] [2022-04-06 20:45:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:11,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:11,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825518145] [2022-04-06 20:45:11,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825518145] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607473604] [2022-04-06 20:45:11,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:11,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:11,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:11,283 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 20:45:11,300 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 20:45:11,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:45:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:11,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607473604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:11,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:11,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 20:45:11,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777724211] [2022-04-06 20:45:11,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777724211] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:11,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:11,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:45:11,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429594118] [2022-04-06 20:45:11,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:11,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:45:11,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:45:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:45:11,499 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:11,594 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-04-06 20:45:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:45:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:45:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:11,595 INFO L225 Difference]: With dead ends: 48 [2022-04-06 20:45:11,595 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:45:11,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:45:11,596 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:11,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:45:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 20:45:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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 20:45:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-04-06 20:45:11,600 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 31 [2022-04-06 20:45:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:11,600 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-04-06 20:45:11,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-04-06 20:45:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:45:11,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:11,601 INFO L499 BasicCegarLoop]: trace histogram [9, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:11,623 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 20:45:11,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:11,817 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1170220699, now seen corresponding path program 11 times [2022-04-06 20:45:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1235031377] [2022-04-06 20:45:11,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:11,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1170220699, now seen corresponding path program 12 times [2022-04-06 20:45:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:11,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326170056] [2022-04-06 20:45:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:11,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326170056] [2022-04-06 20:45:11,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326170056] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:11,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753297963] [2022-04-06 20:45:11,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:11,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:11,898 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 20:45:11,931 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 20:45:11,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:11,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:45:11,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 20:45:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753297963] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:12,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 7] total 18 [2022-04-06 20:45:12,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1235031377] [2022-04-06 20:45:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1235031377] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:12,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:45:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892858518] [2022-04-06 20:45:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:12,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:45:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:45:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:45:12,093 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 20:45:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:12,210 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-04-06 20:45:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:45:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 33 [2022-04-06 20:45:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:12,211 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:45:12,211 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:45:12,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:45:12,212 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:12,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:45:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 20:45:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 20:45:12,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-06 20:45:12,215 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2022-04-06 20:45:12,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:12,216 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-06 20:45:12,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 20:45:12,216 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-06 20:45:12,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:45:12,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:12,216 INFO L499 BasicCegarLoop]: trace histogram [10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:12,234 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 20:45:12,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:12,433 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:12,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1045588158, now seen corresponding path program 13 times [2022-04-06 20:45:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992291555] [2022-04-06 20:45:12,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:12,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:12,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1045588158, now seen corresponding path program 14 times [2022-04-06 20:45:12,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:12,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052647369] [2022-04-06 20:45:12,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:12,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:12,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052647369] [2022-04-06 20:45:12,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052647369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:12,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963011849] [2022-04-06 20:45:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:12,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:12,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:12,535 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 20:45:12,536 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 20:45:12,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:12,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:12,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:45:12,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:12,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:12,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963011849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:12,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:45:12,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992291555] [2022-04-06 20:45:12,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992291555] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:12,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:12,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:45:12,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459874718] [2022-04-06 20:45:12,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:12,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:45:12,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:12,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:45:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:45:12,810 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:12,917 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-04-06 20:45:12,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:45:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:45:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:12,918 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:45:12,918 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:45:12,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:45:12,919 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:12,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:45:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 20:45:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 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 20:45:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-04-06 20:45:12,925 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2022-04-06 20:45:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:12,925 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-04-06 20:45:12,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-06 20:45:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:45:12,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:12,928 INFO L499 BasicCegarLoop]: trace histogram [11, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:12,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 20:45:13,139 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,SelfDestructingSolverStorable10 [2022-04-06 20:45:13,140 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1532800545, now seen corresponding path program 15 times [2022-04-06 20:45:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045662382] [2022-04-06 20:45:13,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:13,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1532800545, now seen corresponding path program 16 times [2022-04-06 20:45:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757682240] [2022-04-06 20:45:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757682240] [2022-04-06 20:45:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757682240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486336270] [2022-04-06 20:45:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:13,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:13,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:13,218 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 20:45:13,219 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 20:45:13,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:13,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:13,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486336270] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:13,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:13,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 20:45:13,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:13,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045662382] [2022-04-06 20:45:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045662382] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:13,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:13,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:45:13,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416190322] [2022-04-06 20:45:13,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:13,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:45:13,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:45:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:45:13,504 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:13,614 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-04-06 20:45:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:45:13,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:45:13,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:13,615 INFO L225 Difference]: With dead ends: 54 [2022-04-06 20:45:13,615 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:45:13,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:45:13,616 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:13,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 32 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:45:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 20:45:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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 20:45:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-06 20:45:13,619 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2022-04-06 20:45:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:13,619 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-06 20:45:13,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-06 20:45:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:45:13,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:13,620 INFO L499 BasicCegarLoop]: trace histogram [12, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:13,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:13,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:13,834 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1592469188, now seen corresponding path program 17 times [2022-04-06 20:45:13,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:13,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96673893] [2022-04-06 20:45:13,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:13,837 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:13,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1592469188, now seen corresponding path program 18 times [2022-04-06 20:45:13,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:13,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454833373] [2022-04-06 20:45:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:13,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454833373] [2022-04-06 20:45:13,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454833373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:13,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321205870] [2022-04-06 20:45:13,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:13,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:13,913 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 20:45:13,951 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 20:45:13,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:13,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,154 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 20:45:14,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321205870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 4, 7] total 21 [2022-04-06 20:45:14,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96673893] [2022-04-06 20:45:14,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96673893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:45:14,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659708625] [2022-04-06 20:45:14,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:45:14,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:45:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:45:14,156 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20:45:14,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:14,285 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2022-04-06 20:45:14,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:45:14,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 39 [2022-04-06 20:45:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:14,285 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:45:14,286 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:45:14,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=343, Invalid=649, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:45:14,286 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:14,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:14,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:45:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 20:45:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 20:45:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-04-06 20:45:14,290 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 39 [2022-04-06 20:45:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:14,290 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-04-06 20:45:14,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 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 20:45:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-04-06 20:45:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:45:14,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:14,290 INFO L499 BasicCegarLoop]: trace histogram [13, 11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:14,306 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 20:45:14,499 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,SelfDestructingSolverStorable12 [2022-04-06 20:45:14,500 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1195507033, now seen corresponding path program 19 times [2022-04-06 20:45:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681254923] [2022-04-06 20:45:14,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:14,502 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1195507033, now seen corresponding path program 20 times [2022-04-06 20:45:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:14,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386895893] [2022-04-06 20:45:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:14,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386895893] [2022-04-06 20:45:14,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386895893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321898958] [2022-04-06 20:45:14,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:14,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:14,597 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 20:45:14,602 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 20:45:14,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:14,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:45:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:14,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321898958] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:45:14,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681254923] [2022-04-06 20:45:14,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681254923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:45:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774348028] [2022-04-06 20:45:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:45:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:45:14,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:45:14,906 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:15,034 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-04-06 20:45:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:45:15,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:45:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:15,034 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:45:15,034 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:45:15,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:45:15,035 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:15,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:45:15,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 20:45:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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 20:45:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-04-06 20:45:15,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 41 [2022-04-06 20:45:15,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:15,039 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-04-06 20:45:15,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,039 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-04-06 20:45:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:45:15,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:15,039 INFO L499 BasicCegarLoop]: trace histogram [14, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:15,057 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 20:45:15,252 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,SelfDestructingSolverStorable13 [2022-04-06 20:45:15,253 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash 381062710, now seen corresponding path program 21 times [2022-04-06 20:45:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:15,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693601974] [2022-04-06 20:45:15,254 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:15,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 381062710, now seen corresponding path program 22 times [2022-04-06 20:45:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:15,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297292642] [2022-04-06 20:45:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:15,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:15,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297292642] [2022-04-06 20:45:15,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297292642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:15,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810673666] [2022-04-06 20:45:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:15,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:15,350 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 20:45:15,362 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 20:45:15,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:15,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:15,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:45:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:15,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:15,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810673666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:15,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:15,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 20:45:15,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693601974] [2022-04-06 20:45:15,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693601974] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:15,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:15,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:45:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427586352] [2022-04-06 20:45:15,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:15,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:45:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:45:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:45:15,669 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:15,795 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-04-06 20:45:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:45:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:45:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:15,796 INFO L225 Difference]: With dead ends: 60 [2022-04-06 20:45:15,796 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:45:15,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:45:15,799 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:15,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:15,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:45:15,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 20:45:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 20:45:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-06 20:45:15,824 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2022-04-06 20:45:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:15,824 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-06 20:45:15,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-06 20:45:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:45:15,825 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:15,825 INFO L499 BasicCegarLoop]: trace histogram [15, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:15,843 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 20:45:16,039 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,SelfDestructingSolverStorable14 [2022-04-06 20:45:16,039 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:16,040 INFO L85 PathProgramCache]: Analyzing trace with hash -615883821, now seen corresponding path program 23 times [2022-04-06 20:45:16,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:16,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308291015] [2022-04-06 20:45:16,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:16,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash -615883821, now seen corresponding path program 24 times [2022-04-06 20:45:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:16,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288656615] [2022-04-06 20:45:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:16,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 42 proven. 182 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288656615] [2022-04-06 20:45:16,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288656615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:16,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076787952] [2022-04-06 20:45:16,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:16,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:16,155 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 20:45:16,156 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 20:45:16,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:16,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:45:16,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 20:45:16,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076787952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:16,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 4, 7] total 24 [2022-04-06 20:45:16,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:16,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308291015] [2022-04-06 20:45:16,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308291015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:16,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:16,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:45:16,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941783651] [2022-04-06 20:45:16,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:16,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:45:16,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:16,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:45:16,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:45:16,360 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 20:45:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:16,513 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-04-06 20:45:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:45:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 45 [2022-04-06 20:45:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:16,514 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:45:16,514 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:45:16,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=493, Invalid=913, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:45:16,515 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:16,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 27 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:16,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:45:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 20:45:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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 20:45:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-04-06 20:45:16,518 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2022-04-06 20:45:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:16,518 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-04-06 20:45:16,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 20:45:16,518 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-04-06 20:45:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:45:16,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:16,519 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:16,537 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 20:45:16,734 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,SelfDestructingSolverStorable15 [2022-04-06 20:45:16,735 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -903793104, now seen corresponding path program 25 times [2022-04-06 20:45:16,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:16,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [245272480] [2022-04-06 20:45:16,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:16,737 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -903793104, now seen corresponding path program 26 times [2022-04-06 20:45:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864889445] [2022-04-06 20:45:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:16,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:16,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:16,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:16,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864889445] [2022-04-06 20:45:16,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864889445] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578465845] [2022-04-06 20:45:16,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:16,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:16,854 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 20:45:16,871 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 20:45:16,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:16,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:16,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:45:16,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:16,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:17,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578465845] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:17,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:17,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:45:17,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:17,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [245272480] [2022-04-06 20:45:17,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [245272480] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:17,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:17,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:45:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190800683] [2022-04-06 20:45:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:17,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:45:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:45:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:45:17,182 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:17,339 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-04-06 20:45:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:45:17,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:45:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:17,339 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:45:17,340 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:45:17,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:45:17,341 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:17,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:45:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 20:45:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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 20:45:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-04-06 20:45:17,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 47 [2022-04-06 20:45:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:17,344 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-04-06 20:45:17,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-04-06 20:45:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:45:17,344 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:17,344 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:17,360 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 20:45:17,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:17,552 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:17,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1588260173, now seen corresponding path program 27 times [2022-04-06 20:45:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796944313] [2022-04-06 20:45:17,554 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:17,554 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1588260173, now seen corresponding path program 28 times [2022-04-06 20:45:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:17,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887606625] [2022-04-06 20:45:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:17,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:17,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:17,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887606625] [2022-04-06 20:45:17,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887606625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:17,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747237596] [2022-04-06 20:45:17,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:17,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:17,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:17,694 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 20:45:17,709 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 20:45:17,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:45:17,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:17,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:18,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747237596] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:18,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:18,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 20:45:18,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:18,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796944313] [2022-04-06 20:45:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796944313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:18,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:18,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:45:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060793150] [2022-04-06 20:45:18,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:18,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:45:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:45:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:45:18,159 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:18,340 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-04-06 20:45:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:45:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:45:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:18,341 INFO L225 Difference]: With dead ends: 66 [2022-04-06 20:45:18,341 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:45:18,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:45:18,342 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:18,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 32 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:45:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 20:45:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 20:45:18,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-04-06 20:45:18,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 49 [2022-04-06 20:45:18,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:18,345 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-04-06 20:45:18,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:18,346 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-04-06 20:45:18,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:45:18,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:18,346 INFO L499 BasicCegarLoop]: trace histogram [18, 16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:18,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:45:18,559 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,SelfDestructingSolverStorable17 [2022-04-06 20:45:18,559 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -140291798, now seen corresponding path program 29 times [2022-04-06 20:45:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90378908] [2022-04-06 20:45:18,561 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:18,561 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:18,561 INFO L85 PathProgramCache]: Analyzing trace with hash -140291798, now seen corresponding path program 30 times [2022-04-06 20:45:18,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394666010] [2022-04-06 20:45:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:18,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:18,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:18,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394666010] [2022-04-06 20:45:18,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394666010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:18,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726113141] [2022-04-06 20:45:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:18,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:18,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:18,716 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 20:45:18,717 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 20:45:18,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:45:18,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 20:45:18,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726113141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:18,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:18,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 4, 4] total 24 [2022-04-06 20:45:18,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90378908] [2022-04-06 20:45:18,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90378908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:18,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:18,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:45:18,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682383133] [2022-04-06 20:45:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:18,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:45:18,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:45:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:45:18,887 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 20:45:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:19,091 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-04-06 20:45:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:45:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 51 [2022-04-06 20:45:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:19,092 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:45:19,092 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:45:19,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=663, Invalid=977, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:45:19,093 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:19,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 22 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:45:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 20:45:19,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 20:45:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-04-06 20:45:19,096 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 51 [2022-04-06 20:45:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:19,096 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-04-06 20:45:19,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 20:45:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-04-06 20:45:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:45:19,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:19,097 INFO L499 BasicCegarLoop]: trace histogram [19, 17, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:19,113 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 20:45:19,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,308 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 873607623, now seen corresponding path program 31 times [2022-04-06 20:45:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431822505] [2022-04-06 20:45:19,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:19,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash 873607623, now seen corresponding path program 32 times [2022-04-06 20:45:19,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516855215] [2022-04-06 20:45:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516855215] [2022-04-06 20:45:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516855215] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484334357] [2022-04-06 20:45:19,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:19,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:19,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:19,473 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 20:45:19,474 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 20:45:19,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:19,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:45:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:19,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:19,977 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 54 proven. 306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:19,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484334357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:19,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:19,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:45:19,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [431822505] [2022-04-06 20:45:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [431822505] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:19,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:19,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:45:19,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640609678] [2022-04-06 20:45:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:19,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:45:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:45:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:45:19,979 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:20,212 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-04-06 20:45:20,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:45:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:45:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:20,213 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:45:20,213 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:45:20,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:45:20,214 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:20,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:45:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 20:45:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 20:45:20,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-04-06 20:45:20,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 53 [2022-04-06 20:45:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:20,217 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-04-06 20:45:20,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:20,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-04-06 20:45:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:45:20,218 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:20,218 INFO L499 BasicCegarLoop]: trace histogram [20, 18, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:20,234 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 20:45:20,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:20,425 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:20,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:20,426 INFO L85 PathProgramCache]: Analyzing trace with hash 273375012, now seen corresponding path program 33 times [2022-04-06 20:45:20,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:20,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1517616500] [2022-04-06 20:45:20,427 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:20,427 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash 273375012, now seen corresponding path program 34 times [2022-04-06 20:45:20,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:20,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126555455] [2022-04-06 20:45:20,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:20,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:20,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:20,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:20,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126555455] [2022-04-06 20:45:20,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126555455] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:20,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614128774] [2022-04-06 20:45:20,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:20,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:20,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:20,628 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 20:45:20,630 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 20:45:20,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:20,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:20,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 20:45:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:20,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:21,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614128774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:21,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:21,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 20:45:21,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1517616500] [2022-04-06 20:45:21,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1517616500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:21,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:21,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:45:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934818163] [2022-04-06 20:45:21,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:21,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:45:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:21,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:45:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:45:21,190 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:21,424 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2022-04-06 20:45:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:45:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:45:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:21,424 INFO L225 Difference]: With dead ends: 72 [2022-04-06 20:45:21,424 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:45:21,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:45:21,426 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:21,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:45:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 20:45:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 20:45:21,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-04-06 20:45:21,429 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 55 [2022-04-06 20:45:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:21,429 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-04-06 20:45:21,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-04-06 20:45:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:45:21,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:21,429 INFO L499 BasicCegarLoop]: trace histogram [21, 19, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:21,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:21,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:21,660 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1024546495, now seen corresponding path program 35 times [2022-04-06 20:45:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034210158] [2022-04-06 20:45:21,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:21,662 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1024546495, now seen corresponding path program 36 times [2022-04-06 20:45:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:21,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051345489] [2022-04-06 20:45:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:21,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:21,825 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:21,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051345489] [2022-04-06 20:45:21,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051345489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:21,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293963230] [2022-04-06 20:45:21,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:21,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:21,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:21,827 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 20:45:21,854 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 20:45:21,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:45:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 20:45:22,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293963230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:22,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:22,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4, 7] total 30 [2022-04-06 20:45:22,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034210158] [2022-04-06 20:45:22,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034210158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:22,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:22,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:45:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519108228] [2022-04-06 20:45:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:22,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:45:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:45:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=536, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:45:22,080 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 20:45:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:22,350 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2022-04-06 20:45:22,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:45:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 57 [2022-04-06 20:45:22,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:22,352 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:45:22,352 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:45:22,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=874, Invalid=1576, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:45:22,354 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:22,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:45:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 20:45:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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 20:45:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-04-06 20:45:22,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 57 [2022-04-06 20:45:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:22,358 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-04-06 20:45:22,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 20:45:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-04-06 20:45:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:45:22,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:22,362 INFO L499 BasicCegarLoop]: trace histogram [22, 20, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:22,378 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 20:45:22,578 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:22,578 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1508368414, now seen corresponding path program 37 times [2022-04-06 20:45:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:22,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819118705] [2022-04-06 20:45:22,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:22,580 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1508368414, now seen corresponding path program 38 times [2022-04-06 20:45:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:22,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936525309] [2022-04-06 20:45:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:22,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936525309] [2022-04-06 20:45:22,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936525309] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911257914] [2022-04-06 20:45:22,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:22,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:22,779 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 20:45:22,784 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 20:45:22,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:22,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:22,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:45:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:22,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 63 proven. 420 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:23,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911257914] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:23,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:23,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:45:23,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:23,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819118705] [2022-04-06 20:45:23,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819118705] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:23,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:23,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:45:23,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571198720] [2022-04-06 20:45:23,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:23,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:45:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:45:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:45:23,337 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:23,587 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-04-06 20:45:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:45:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:45:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:23,588 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:45:23,589 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:45:23,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:45:23,590 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:23,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:45:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 20:45:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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 20:45:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-04-06 20:45:23,597 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 59 [2022-04-06 20:45:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:23,597 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-04-06 20:45:23,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-04-06 20:45:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:45:23,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:23,598 INFO L499 BasicCegarLoop]: trace histogram [23, 21, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:23,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 20:45:23,808 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,SelfDestructingSolverStorable22 [2022-04-06 20:45:23,809 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:23,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash 393139131, now seen corresponding path program 39 times [2022-04-06 20:45:23,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:23,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871790222] [2022-04-06 20:45:23,811 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:23,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash 393139131, now seen corresponding path program 40 times [2022-04-06 20:45:23,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:23,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744171180] [2022-04-06 20:45:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:23,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:24,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:24,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744171180] [2022-04-06 20:45:24,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744171180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:24,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047324659] [2022-04-06 20:45:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:24,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:24,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:24,033 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 20:45:24,037 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 20:45:24,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:24,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:24,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:45:24,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 66 proven. 462 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:24,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047324659] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:24,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 20:45:24,736 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:24,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871790222] [2022-04-06 20:45:24,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871790222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:24,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:45:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094708098] [2022-04-06 20:45:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:24,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:45:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:45:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:24,737 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:25,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:25,044 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2022-04-06 20:45:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:45:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:45:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:25,045 INFO L225 Difference]: With dead ends: 78 [2022-04-06 20:45:25,045 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:45:25,047 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:45:25,047 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:25,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:45:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 20:45:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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 20:45:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-04-06 20:45:25,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 61 [2022-04-06 20:45:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:25,051 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-04-06 20:45:25,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:25,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-04-06 20:45:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:45:25,053 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:25,053 INFO L499 BasicCegarLoop]: trace histogram [24, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:25,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:25,263 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,SelfDestructingSolverStorable23 [2022-04-06 20:45:25,263 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1895345128, now seen corresponding path program 41 times [2022-04-06 20:45:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [692394573] [2022-04-06 20:45:25,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:25,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:25,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1895345128, now seen corresponding path program 42 times [2022-04-06 20:45:25,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:25,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327261094] [2022-04-06 20:45:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:25,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:25,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 69 proven. 506 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:25,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:25,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327261094] [2022-04-06 20:45:25,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327261094] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375827915] [2022-04-06 20:45:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:25,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:25,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:25,453 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 20:45:25,454 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 20:45:25,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:25,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:45:25,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 70 proven. 2 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 20:45:25,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375827915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:25,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:25,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 4, 7] total 33 [2022-04-06 20:45:25,679 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:25,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [692394573] [2022-04-06 20:45:25,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [692394573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:25,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:25,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:45:25,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495596041] [2022-04-06 20:45:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:25,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:45:25,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:45:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=641, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:45:25,687 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 20:45:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:25,978 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-04-06 20:45:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:45:25,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 63 [2022-04-06 20:45:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:25,979 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:45:25,979 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:45:25,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1105, Invalid=1975, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:45:25,980 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:25,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:45:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 20:45:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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 20:45:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-04-06 20:45:25,986 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 63 [2022-04-06 20:45:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:25,986 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-04-06 20:45:25,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 20:45:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-04-06 20:45:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:45:25,987 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:25,987 INFO L499 BasicCegarLoop]: trace histogram [25, 23, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:26,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:26,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:26,202 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2105462475, now seen corresponding path program 43 times [2022-04-06 20:45:26,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:26,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524241089] [2022-04-06 20:45:26,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:26,204 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:26,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2105462475, now seen corresponding path program 44 times [2022-04-06 20:45:26,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:26,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096095172] [2022-04-06 20:45:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:26,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096095172] [2022-04-06 20:45:26,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096095172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:26,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221138817] [2022-04-06 20:45:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:26,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:26,387 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 20:45:26,388 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 20:45:26,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:45:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:26,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 72 proven. 552 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221138817] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:26,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:26,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:45:26,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:26,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524241089] [2022-04-06 20:45:26,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524241089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:26,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:26,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:45:26,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997918933] [2022-04-06 20:45:26,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:26,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:45:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:26,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:45:26,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:45:26,998 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:27,222 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-04-06 20:45:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:45:27,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:45:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:27,223 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:45:27,223 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:45:27,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:45:27,225 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:27,226 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 37 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:27,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:45:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 20:45:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 20:45:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-04-06 20:45:27,229 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 65 [2022-04-06 20:45:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:27,229 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-04-06 20:45:27,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-04-06 20:45:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:45:27,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:27,230 INFO L499 BasicCegarLoop]: trace histogram [26, 24, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:27,247 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 20:45:27,446 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:27,447 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:27,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2130197266, now seen corresponding path program 45 times [2022-04-06 20:45:27,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:27,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [190215510] [2022-04-06 20:45:27,448 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:27,448 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2130197266, now seen corresponding path program 46 times [2022-04-06 20:45:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:27,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492595693] [2022-04-06 20:45:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:27,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:27,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492595693] [2022-04-06 20:45:27,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492595693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:27,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421118387] [2022-04-06 20:45:27,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:27,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:27,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:27,716 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 20:45:27,717 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 20:45:27,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:27,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:27,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:45:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:27,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 75 proven. 600 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421118387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:28,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:28,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 20:45:28,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [190215510] [2022-04-06 20:45:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [190215510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:28,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:28,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:45:28,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139430509] [2022-04-06 20:45:28,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:28,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:45:28,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:28,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:45:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:45:28,318 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:28,569 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-04-06 20:45:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:45:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:45:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:28,574 INFO L225 Difference]: With dead ends: 84 [2022-04-06 20:45:28,574 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:45:28,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:45:28,575 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:28,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:45:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 20:45:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 20:45:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-04-06 20:45:28,579 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 67 [2022-04-06 20:45:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:28,579 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-04-06 20:45:28,579 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-04-06 20:45:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:45:28,580 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:28,580 INFO L499 BasicCegarLoop]: trace histogram [27, 25, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:28,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:28,780 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,SelfDestructingSolverStorable26 [2022-04-06 20:45:28,781 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:28,781 INFO L85 PathProgramCache]: Analyzing trace with hash 970211759, now seen corresponding path program 47 times [2022-04-06 20:45:28,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:28,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [450877963] [2022-04-06 20:45:28,782 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:28,782 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:28,783 INFO L85 PathProgramCache]: Analyzing trace with hash 970211759, now seen corresponding path program 48 times [2022-04-06 20:45:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:28,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746862183] [2022-04-06 20:45:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:29,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 78 proven. 650 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746862183] [2022-04-06 20:45:29,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746862183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:29,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124371900] [2022-04-06 20:45:29,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:29,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:29,051 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 20:45:29,052 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 20:45:29,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:29,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:29,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:45:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 20:45:29,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124371900] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:29,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:29,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 7] total 36 [2022-04-06 20:45:29,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [450877963] [2022-04-06 20:45:29,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [450877963] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:29,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:29,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:45:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583961960] [2022-04-06 20:45:29,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:29,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:45:29,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:45:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=755, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:45:29,343 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 20:45:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:29,739 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-04-06 20:45:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:45:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 69 [2022-04-06 20:45:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:29,740 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:45:29,740 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:45:29,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1363, Invalid=2419, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:45:29,741 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:29,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 42 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:45:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 20:45:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 20:45:29,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-04-06 20:45:29,754 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 69 [2022-04-06 20:45:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:29,754 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-04-06 20:45:29,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 20:45:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-04-06 20:45:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:45:29,754 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:29,755 INFO L499 BasicCegarLoop]: trace histogram [28, 26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:29,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:29,955 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,SelfDestructingSolverStorable27 [2022-04-06 20:45:29,955 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1379330804, now seen corresponding path program 49 times [2022-04-06 20:45:29,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:29,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1700625617] [2022-04-06 20:45:29,957 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:29,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:29,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1379330804, now seen corresponding path program 50 times [2022-04-06 20:45:29,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784001181] [2022-04-06 20:45:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:29,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:30,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784001181] [2022-04-06 20:45:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784001181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:30,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619006751] [2022-04-06 20:45:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:30,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:30,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:30,264 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 20:45:30,301 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 20:45:30,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:30,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:45:30,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:30,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 81 proven. 702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:31,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619006751] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:31,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:31,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-04-06 20:45:31,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1700625617] [2022-04-06 20:45:31,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1700625617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:31,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:31,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:45:31,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866134966] [2022-04-06 20:45:31,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:31,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:45:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:45:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:45:31,259 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:31,535 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-04-06 20:45:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:45:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 20:45:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:31,538 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:45:31,538 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:45:31,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3138, Invalid=4002, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:45:31,540 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:31,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 42 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:45:31,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 20:45:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 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 20:45:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-04-06 20:45:31,548 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 71 [2022-04-06 20:45:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:31,548 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-04-06 20:45:31,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-04-06 20:45:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:45:31,548 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:31,548 INFO L499 BasicCegarLoop]: trace histogram [29, 27, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:31,564 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 20:45:31,763 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,SelfDestructingSolverStorable28 [2022-04-06 20:45:31,763 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -136936151, now seen corresponding path program 51 times [2022-04-06 20:45:31,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:31,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [97306765] [2022-04-06 20:45:31,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:31,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:31,773 INFO L85 PathProgramCache]: Analyzing trace with hash -136936151, now seen corresponding path program 52 times [2022-04-06 20:45:31,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:31,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129658497] [2022-04-06 20:45:31,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:31,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129658497] [2022-04-06 20:45:32,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129658497] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909025908] [2022-04-06 20:45:32,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:32,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:32,079 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 20:45:32,081 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 20:45:32,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:45:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:32,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 843 backedges. 84 proven. 756 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:32,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909025908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:32,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:32,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 20:45:32,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:32,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [97306765] [2022-04-06 20:45:32,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [97306765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:32,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:32,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:45:32,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962114067] [2022-04-06 20:45:32,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:32,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:45:32,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:32,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:45:32,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:45:32,756 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:33,015 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-04-06 20:45:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:45:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 20:45:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:33,021 INFO L225 Difference]: With dead ends: 90 [2022-04-06 20:45:33,021 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:45:33,022 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:45:33,023 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:33,023 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:45:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 20:45:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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 20:45:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-04-06 20:45:33,026 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 73 [2022-04-06 20:45:33,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:33,026 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-04-06 20:45:33,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 30 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-04-06 20:45:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:45:33,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:33,027 INFO L499 BasicCegarLoop]: trace histogram [30, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:33,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:33,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,239 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:33,240 INFO L85 PathProgramCache]: Analyzing trace with hash -196582906, now seen corresponding path program 53 times [2022-04-06 20:45:33,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1221864132] [2022-04-06 20:45:33,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:33,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -196582906, now seen corresponding path program 54 times [2022-04-06 20:45:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230525769] [2022-04-06 20:45:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 87 proven. 812 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:33,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230525769] [2022-04-06 20:45:33,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230525769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:33,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427981153] [2022-04-06 20:45:33,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:33,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:33,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:33,591 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 20:45:33,593 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 20:45:33,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:33,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:45:33,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 20:45:33,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427981153] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:33,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:33,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 7] total 39 [2022-04-06 20:45:33,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:33,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1221864132] [2022-04-06 20:45:33,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1221864132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:33,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:33,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:45:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129129880] [2022-04-06 20:45:33,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:33,889 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:45:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:45:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=878, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:45:33,904 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 20:45:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:34,368 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2022-04-06 20:45:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:45:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 75 [2022-04-06 20:45:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:34,369 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:45:34,369 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:45:34,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1648, Invalid=2908, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:45:34,370 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:34,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:45:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 20:45:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 20:45:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-04-06 20:45:34,376 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 75 [2022-04-06 20:45:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:34,377 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-04-06 20:45:34,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 31 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 20:45:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-04-06 20:45:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:45:34,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:34,377 INFO L499 BasicCegarLoop]: trace histogram [31, 29, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:34,393 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 20:45:34,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:34,587 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:34,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1682539613, now seen corresponding path program 55 times [2022-04-06 20:45:34,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [588659165] [2022-04-06 20:45:34,589 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:34,589 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1682539613, now seen corresponding path program 56 times [2022-04-06 20:45:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:34,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333098028] [2022-04-06 20:45:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:34,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:34,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333098028] [2022-04-06 20:45:34,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333098028] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:34,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914727373] [2022-04-06 20:45:34,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:34,887 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 20:45:34,923 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 20:45:34,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:34,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:34,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:45:34,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:35,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 90 proven. 870 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:36,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914727373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:36,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:36,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-04-06 20:45:36,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:36,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [588659165] [2022-04-06 20:45:36,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [588659165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:36,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:36,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:45:36,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886155305] [2022-04-06 20:45:36,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:36,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:45:36,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:36,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:45:36,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:45:36,019 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:36,470 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-04-06 20:45:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:45:36,470 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:45:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:36,471 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:45:36,471 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:45:36,472 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3846, Invalid=4896, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:45:36,472 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:36,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 37 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:45:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 20:45:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 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 20:45:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-04-06 20:45:36,475 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 77 [2022-04-06 20:45:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:36,475 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-04-06 20:45:36,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-04-06 20:45:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:45:36,476 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:36,476 INFO L499 BasicCegarLoop]: trace histogram [32, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:36,491 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 20:45:36,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:36,683 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash 537174528, now seen corresponding path program 57 times [2022-04-06 20:45:36,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126679832] [2022-04-06 20:45:36,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:36,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash 537174528, now seen corresponding path program 58 times [2022-04-06 20:45:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:36,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786702526] [2022-04-06 20:45:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:36,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:36,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:36,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786702526] [2022-04-06 20:45:36,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786702526] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:36,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151364832] [2022-04-06 20:45:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:36,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:36,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:36,988 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 20:45:36,989 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 20:45:37,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 20:45:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:37,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 93 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151364832] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:37,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:37,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 20:45:37,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126679832] [2022-04-06 20:45:37,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126679832] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:37,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:37,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:45:37,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453988565] [2022-04-06 20:45:37,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:37,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:45:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:37,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:45:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:45:37,843 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:38,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:38,159 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2022-04-06 20:45:38,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:45:38,159 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 20:45:38,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:38,159 INFO L225 Difference]: With dead ends: 96 [2022-04-06 20:45:38,160 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:45:38,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:45:38,161 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:38,161 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 52 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:45:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 20:45:38,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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 20:45:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-04-06 20:45:38,172 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 79 [2022-04-06 20:45:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:38,172 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-04-06 20:45:38,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.176470588235294) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-04-06 20:45:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:45:38,173 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:38,173 INFO L499 BasicCegarLoop]: trace histogram [33, 31, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:38,190 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 20:45:38,387 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,SelfDestructingSolverStorable32 [2022-04-06 20:45:38,387 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -916282083, now seen corresponding path program 59 times [2022-04-06 20:45:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:38,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274942695] [2022-04-06 20:45:38,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:38,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash -916282083, now seen corresponding path program 60 times [2022-04-06 20:45:38,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:38,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180146064] [2022-04-06 20:45:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:38,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:38,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 96 proven. 992 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:38,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180146064] [2022-04-06 20:45:38,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180146064] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783445971] [2022-04-06 20:45:38,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:38,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:38,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:38,810 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 20:45:38,811 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 20:45:38,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:38,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:38,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:38,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:45:38,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1091 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 20:45:39,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783445971] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:39,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:39,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 4, 7] total 42 [2022-04-06 20:45:39,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:39,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274942695] [2022-04-06 20:45:39,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274942695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:39,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:39,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:45:39,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965707051] [2022-04-06 20:45:39,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:39,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:45:39,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:45:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=1010, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:45:39,142 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 20:45:39,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:39,654 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2022-04-06 20:45:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:45:39,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 81 [2022-04-06 20:45:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:39,655 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:45:39,655 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:45:39,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1960, Invalid=3442, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:45:39,656 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:39,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 32 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:39,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:45:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 20:45:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 20:45:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-04-06 20:45:39,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 81 [2022-04-06 20:45:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:39,659 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-04-06 20:45:39,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 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 20:45:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-04-06 20:45:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:45:39,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:39,660 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:39,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:45:39,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:39,876 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:39,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:39,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1823714054, now seen corresponding path program 61 times [2022-04-06 20:45:39,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:39,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381255322] [2022-04-06 20:45:39,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:39,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:39,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1823714054, now seen corresponding path program 62 times [2022-04-06 20:45:39,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:39,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975224419] [2022-04-06 20:45:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:39,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975224419] [2022-04-06 20:45:40,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975224419] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:40,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771047656] [2022-04-06 20:45:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:40,295 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 20:45:40,296 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 20:45:40,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:40,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:45:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:40,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1158 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771047656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:41,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-06 20:45:41,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:41,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381255322] [2022-04-06 20:45:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381255322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:41,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:45:41,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532500137] [2022-04-06 20:45:41,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:41,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:45:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:45:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:45:41,541 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:42,065 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-04-06 20:45:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:45:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 20:45:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:42,066 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:45:42,066 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:45:42,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4626, Invalid=5880, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:45:42,068 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:42,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 52 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:45:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 20:45:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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 20:45:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-04-06 20:45:42,071 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 83 [2022-04-06 20:45:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:42,071 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-04-06 20:45:42,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-04-06 20:45:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:45:42,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:42,072 INFO L499 BasicCegarLoop]: trace histogram [35, 33, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:42,090 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 20:45:42,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:42,288 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1987477097, now seen corresponding path program 63 times [2022-04-06 20:45:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:42,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983795228] [2022-04-06 20:45:42,291 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:42,291 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1987477097, now seen corresponding path program 64 times [2022-04-06 20:45:42,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:42,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837428664] [2022-04-06 20:45:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:42,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837428664] [2022-04-06 20:45:42,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837428664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:42,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164811891] [2022-04-06 20:45:42,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:42,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:42,723 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 20:45:42,724 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 20:45:42,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:45:42,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:42,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1227 backedges. 102 proven. 1122 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164811891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:44,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:44,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 20:45:44,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983795228] [2022-04-06 20:45:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983795228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:44,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:44,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:45:44,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166783929] [2022-04-06 20:45:44,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:44,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:45:44,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:45:44,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:45:44,118 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:44,654 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-04-06 20:45:44,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:45:44,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 20:45:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:44,655 INFO L225 Difference]: With dead ends: 102 [2022-04-06 20:45:44,655 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:45:44,656 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:45:44,657 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:44,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:45:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 20:45:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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 20:45:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-04-06 20:45:44,661 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 85 [2022-04-06 20:45:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:44,661 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-04-06 20:45:44,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:44,661 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-04-06 20:45:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:45:44,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:44,662 INFO L499 BasicCegarLoop]: trace histogram [36, 34, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:44,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 20:45:44,868 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,SelfDestructingSolverStorable35 [2022-04-06 20:45:44,869 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:44,869 INFO L85 PathProgramCache]: Analyzing trace with hash -449971468, now seen corresponding path program 65 times [2022-04-06 20:45:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:44,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [886811876] [2022-04-06 20:45:44,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:44,871 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash -449971468, now seen corresponding path program 66 times [2022-04-06 20:45:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:44,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965603209] [2022-04-06 20:45:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:45,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 105 proven. 1190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:45,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965603209] [2022-04-06 20:45:45,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965603209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:45,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181077289] [2022-04-06 20:45:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:45,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:45,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:45,371 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 20:45:45,372 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 20:45:45,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:45,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:45,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:45:45,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1298 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 20:45:45,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181077289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:45,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:45,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 4, 7] total 45 [2022-04-06 20:45:45,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:45,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [886811876] [2022-04-06 20:45:45,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [886811876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:45,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:45,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:45:45,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366032990] [2022-04-06 20:45:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:45,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:45:45,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:45:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1151, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:45:45,711 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 20:45:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:46,315 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2022-04-06 20:45:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:45:46,315 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 87 [2022-04-06 20:45:46,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:46,316 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:45:46,316 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:45:46,317 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2299, Invalid=4021, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:45:46,317 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:46,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:45:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 20:45:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 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 20:45:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-04-06 20:45:46,321 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 87 [2022-04-06 20:45:46,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:46,322 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-04-06 20:45:46,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 37 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 20:45:46,322 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-04-06 20:45:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:45:46,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:46,322 INFO L499 BasicCegarLoop]: trace histogram [37, 35, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:46,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:46,531 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,SelfDestructingSolverStorable36 [2022-04-06 20:45:46,531 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:46,532 INFO L85 PathProgramCache]: Analyzing trace with hash -375811823, now seen corresponding path program 67 times [2022-04-06 20:45:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326055707] [2022-04-06 20:45:46,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:46,533 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:46,533 INFO L85 PathProgramCache]: Analyzing trace with hash -375811823, now seen corresponding path program 68 times [2022-04-06 20:45:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:46,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544823077] [2022-04-06 20:45:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:46,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:46,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544823077] [2022-04-06 20:45:46,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544823077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265766583] [2022-04-06 20:45:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:46,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:46,851 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 20:45:46,852 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 20:45:46,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:45:46,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:46,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 108 proven. 1260 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265766583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:47,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-04-06 20:45:47,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:47,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326055707] [2022-04-06 20:45:47,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326055707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:47,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:45:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736419216] [2022-04-06 20:45:47,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:47,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:45:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:45:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:45:47,773 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:48,165 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-04-06 20:45:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:45:48,166 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 20:45:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:48,166 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:45:48,166 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:45:48,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5478, Invalid=6954, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:45:48,167 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:48,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 27 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:45:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:45:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 20:45:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 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 20:45:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-04-06 20:45:48,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 89 [2022-04-06 20:45:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:48,170 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-04-06 20:45:48,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-04-06 20:45:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:45:48,171 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:48,171 INFO L499 BasicCegarLoop]: trace histogram [38, 36, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:48,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:48,386 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,SelfDestructingSolverStorable37 [2022-04-06 20:45:48,387 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:48,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:48,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2122837010, now seen corresponding path program 69 times [2022-04-06 20:45:48,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:48,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86802994] [2022-04-06 20:45:48,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:48,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:48,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2122837010, now seen corresponding path program 70 times [2022-04-06 20:45:48,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:48,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933589616] [2022-04-06 20:45:48,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:48,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:48,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:48,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933589616] [2022-04-06 20:45:48,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933589616] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:48,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638686237] [2022-04-06 20:45:48,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:48,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:48,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:48,733 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 20:45:48,734 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 20:45:48,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:48,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 20:45:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:48,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 111 proven. 1332 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:49,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638686237] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:49,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:49,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 20:45:49,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:49,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86802994] [2022-04-06 20:45:49,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86802994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:49,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:49,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:45:49,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621929476] [2022-04-06 20:45:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:49,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:45:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:45:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:45:49,727 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:50,188 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-04-06 20:45:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:45:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 20:45:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:50,189 INFO L225 Difference]: With dead ends: 108 [2022-04-06 20:45:50,189 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:45:50,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:45:50,190 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:50,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 42 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:45:50,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 20:45:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 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 20:45:50,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-04-06 20:45:50,194 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 91 [2022-04-06 20:45:50,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:50,194 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-04-06 20:45:50,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.15) internal successors, (86), 39 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,194 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-04-06 20:45:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:45:50,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:50,195 INFO L499 BasicCegarLoop]: trace histogram [39, 37, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:50,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:50,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:45:50,410 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1681828981, now seen corresponding path program 71 times [2022-04-06 20:45:50,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:50,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1901101743] [2022-04-06 20:45:50,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:50,412 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:50,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1681828981, now seen corresponding path program 72 times [2022-04-06 20:45:50,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:50,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566714188] [2022-04-06 20:45:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:50,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 114 proven. 1406 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566714188] [2022-04-06 20:45:50,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566714188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:50,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980774181] [2022-04-06 20:45:50,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:50,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:50,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:50,957 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 20:45:50,958 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 20:45:50,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:50,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:45:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:45:51,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1523 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 20:45:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980774181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:51,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:51,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 4, 7] total 48 [2022-04-06 20:45:51,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1901101743] [2022-04-06 20:45:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1901101743] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:51,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:51,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:45:51,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167235872] [2022-04-06 20:45:51,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:51,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:45:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:45:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=1301, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:51,236 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 20:45:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:51,955 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2022-04-06 20:45:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:45:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 93 [2022-04-06 20:45:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:51,956 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:45:51,956 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:45:51,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2665, Invalid=4645, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:45:51,957 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:51,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 32 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:45:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 20:45:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 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 20:45:51,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-04-06 20:45:51,960 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 93 [2022-04-06 20:45:51,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:51,961 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-04-06 20:45:51,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 40 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 20:45:51,961 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-04-06 20:45:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:45:51,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:51,961 INFO L499 BasicCegarLoop]: trace histogram [40, 38, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:51,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:45:52,171 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,SelfDestructingSolverStorable39 [2022-04-06 20:45:52,171 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1220091880, now seen corresponding path program 73 times [2022-04-06 20:45:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1164385051] [2022-04-06 20:45:52,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:52,173 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:52,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1220091880, now seen corresponding path program 74 times [2022-04-06 20:45:52,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:52,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507180431] [2022-04-06 20:45:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:52,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:52,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507180431] [2022-04-06 20:45:52,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507180431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:52,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987611808] [2022-04-06 20:45:52,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:52,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:52,571 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 20:45:52,572 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 20:45:52,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:52,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:52,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:45:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:52,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 117 proven. 1482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:53,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987611808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:53,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:53,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-04-06 20:45:53,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:53,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1164385051] [2022-04-06 20:45:53,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1164385051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:53,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:53,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:45:53,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28710955] [2022-04-06 20:45:53,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:53,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:45:53,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:53,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:45:53,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:45:53,664 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:54,151 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2022-04-06 20:45:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:45:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 20:45:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:54,152 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:45:54,152 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:45:54,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6402, Invalid=8118, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:45:54,155 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:54,156 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 32 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:45:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 20:45:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 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 20:45:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-04-06 20:45:54,160 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 95 [2022-04-06 20:45:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:54,160 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-04-06 20:45:54,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-04-06 20:45:54,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:45:54,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:54,160 INFO L499 BasicCegarLoop]: trace histogram [41, 39, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:54,176 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 20:45:54,375 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,SelfDestructingSolverStorable40 [2022-04-06 20:45:54,375 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:54,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1762703099, now seen corresponding path program 75 times [2022-04-06 20:45:54,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:54,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2098807621] [2022-04-06 20:45:54,380 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:54,380 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1762703099, now seen corresponding path program 76 times [2022-04-06 20:45:54,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128900660] [2022-04-06 20:45:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:54,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:54,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:54,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:54,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128900660] [2022-04-06 20:45:54,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128900660] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:54,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814744940] [2022-04-06 20:45:54,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:54,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:54,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:54,824 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 20:45:54,826 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 20:45:54,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:54,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:45:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:54,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 120 proven. 1560 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814744940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:55,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:55,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 20:45:55,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2098807621] [2022-04-06 20:45:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2098807621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:55,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:55,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:45:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206984328] [2022-04-06 20:45:55,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:55,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:45:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:45:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:45:55,969 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:56,477 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2022-04-06 20:45:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:45:56,478 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 20:45:56,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:56,478 INFO L225 Difference]: With dead ends: 114 [2022-04-06 20:45:56,478 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:45:56,480 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:45:56,481 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:56,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:45:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 20:45:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 20:45:56,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-04-06 20:45:56,491 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 97 [2022-04-06 20:45:56,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:56,491 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-04-06 20:45:56,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 42 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:56,491 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-04-06 20:45:56,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:45:56,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:56,491 INFO L499 BasicCegarLoop]: trace histogram [42, 40, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:56,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:56,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:45:56,697 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 809475810, now seen corresponding path program 77 times [2022-04-06 20:45:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182315864] [2022-04-06 20:45:56,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:56,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 809475810, now seen corresponding path program 78 times [2022-04-06 20:45:56,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:56,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075853123] [2022-04-06 20:45:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:56,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:57,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 123 proven. 1640 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:57,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075853123] [2022-04-06 20:45:57,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075853123] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:57,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838141753] [2022-04-06 20:45:57,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:57,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:57,117 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 20:45:57,118 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 20:45:57,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:45:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:45:57,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1766 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 20:45:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838141753] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:57,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 4, 4] total 48 [2022-04-06 20:45:57,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [182315864] [2022-04-06 20:45:57,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [182315864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:57,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:57,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:45:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271749754] [2022-04-06 20:45:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:57,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:45:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:45:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:45:57,378 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 20:45:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:57,856 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2022-04-06 20:45:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:45:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 99 [2022-04-06 20:45:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:57,857 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:45:57,857 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:45:57,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3051, Invalid=4781, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:45:57,862 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:57,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 37 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:45:57,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:45:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 20:45:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 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 20:45:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-04-06 20:45:57,871 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 99 [2022-04-06 20:45:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:57,872 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-04-06 20:45:57,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 43 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 20:45:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-04-06 20:45:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:45:57,872 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:57,872 INFO L499 BasicCegarLoop]: trace histogram [43, 41, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:57,889 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 20:45:58,088 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,SelfDestructingSolverStorable42 [2022-04-06 20:45:58,088 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:58,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:58,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1227755137, now seen corresponding path program 79 times [2022-04-06 20:45:58,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:58,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877343302] [2022-04-06 20:45:58,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:58,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:58,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1227755137, now seen corresponding path program 80 times [2022-04-06 20:45:58,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:58,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827639303] [2022-04-06 20:45:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:58,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:58,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827639303] [2022-04-06 20:45:58,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827639303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:58,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362047834] [2022-04-06 20:45:58,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:58,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:58,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:58,654 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 20:45:58,703 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 20:45:58,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:58,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:58,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:45:58,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:45:58,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 126 proven. 1722 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:00,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362047834] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:00,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:00,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-04-06 20:46:00,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:00,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877343302] [2022-04-06 20:46:00,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877343302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:00,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:00,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:46:00,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567766530] [2022-04-06 20:46:00,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:00,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:46:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:00,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:46:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:46:00,341 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:01,151 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-04-06 20:46:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:46:01,151 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 20:46:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:01,151 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:46:01,151 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:46:01,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7398, Invalid=9372, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:46:01,153 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 53 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:01,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 47 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:46:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 20:46:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 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 20:46:01,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-04-06 20:46:01,156 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 101 [2022-04-06 20:46:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:01,157 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-04-06 20:46:01,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1333333333333333) internal successors, (96), 44 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-04-06 20:46:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:46:01,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:01,157 INFO L499 BasicCegarLoop]: trace histogram [44, 42, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:01,207 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 20:46:01,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:01,358 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -501608228, now seen corresponding path program 81 times [2022-04-06 20:46:01,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [159208294] [2022-04-06 20:46:01,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:01,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -501608228, now seen corresponding path program 82 times [2022-04-06 20:46:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072877975] [2022-04-06 20:46:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:02,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072877975] [2022-04-06 20:46:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072877975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:02,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177835029] [2022-04-06 20:46:02,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:02,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:02,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:02,010 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 20:46:02,011 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 20:46:02,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:02,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:02,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 20:46:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:02,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 129 proven. 1806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:03,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177835029] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:03,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:03,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 20:46:03,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:03,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [159208294] [2022-04-06 20:46:03,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [159208294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:03,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:03,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:46:03,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48415776] [2022-04-06 20:46:03,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:03,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:46:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:46:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:46:03,892 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:04,709 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-04-06 20:46:04,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:46:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 20:46:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:04,710 INFO L225 Difference]: With dead ends: 120 [2022-04-06 20:46:04,710 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:46:04,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:46:04,711 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:04,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 37 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:46:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 20:46:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 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 20:46:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-04-06 20:46:04,715 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 103 [2022-04-06 20:46:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:04,715 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-04-06 20:46:04,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.130434782608696) internal successors, (98), 45 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-04-06 20:46:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:46:04,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:04,716 INFO L499 BasicCegarLoop]: trace histogram [45, 43, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:04,732 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 20:46:04,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:04,923 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1540869369, now seen corresponding path program 83 times [2022-04-06 20:46:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:04,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [237055782] [2022-04-06 20:46:04,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:04,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1540869369, now seen corresponding path program 84 times [2022-04-06 20:46:04,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:04,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180965203] [2022-04-06 20:46:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:05,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 132 proven. 1892 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:05,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:05,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180965203] [2022-04-06 20:46:05,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180965203] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:05,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695448595] [2022-04-06 20:46:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:05,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:05,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:05,596 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 20:46:05,643 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 20:46:05,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:05,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:05,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:46:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:46:05,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:06,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 20:46:06,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695448595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:06,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:06,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 4, 7] total 54 [2022-04-06 20:46:06,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:06,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [237055782] [2022-04-06 20:46:06,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [237055782] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:06,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:06,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:46:06,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230238375] [2022-04-06 20:46:06,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:06,072 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:46:06,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:06,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:46:06,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1234, Invalid=1628, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:46:06,073 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 20:46:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:06,941 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-04-06 20:46:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:46:06,955 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 105 [2022-04-06 20:46:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:06,955 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:46:06,956 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 20:46:06,956 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3478, Invalid=6028, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:46:06,956 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:06,957 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 47 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 20:46:06,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 20:46:06,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 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 20:46:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-04-06 20:46:06,960 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 105 [2022-04-06 20:46:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:06,961 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-04-06 20:46:06,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 46 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 20:46:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-04-06 20:46:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:46:06,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:06,961 INFO L499 BasicCegarLoop]: trace histogram [46, 44, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:06,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:07,174 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,SelfDestructingSolverStorable45 [2022-04-06 20:46:07,174 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:07,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1561785814, now seen corresponding path program 85 times [2022-04-06 20:46:07,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:07,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637750455] [2022-04-06 20:46:07,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:07,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:07,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1561785814, now seen corresponding path program 86 times [2022-04-06 20:46:07,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:07,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898575168] [2022-04-06 20:46:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:07,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:07,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:07,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898575168] [2022-04-06 20:46:07,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898575168] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378828683] [2022-04-06 20:46:07,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:07,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:07,872 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 20:46:07,873 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 20:46:07,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:07,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:46:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:08,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2118 backedges. 135 proven. 1980 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:10,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378828683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:10,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:10,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-04-06 20:46:10,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:10,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637750455] [2022-04-06 20:46:10,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637750455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:10,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:10,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:46:10,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359121140] [2022-04-06 20:46:10,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:10,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:46:10,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:46:10,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:46:10,069 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:10,975 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2022-04-06 20:46:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:46:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 20:46:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:10,976 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:46:10,976 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:46:10,977 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8466, Invalid=10716, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:46:10,978 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:10,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 42 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:46:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 20:46:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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 20:46:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-04-06 20:46:10,982 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 107 [2022-04-06 20:46:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:10,982 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-04-06 20:46:10,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.125) internal successors, (102), 47 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-04-06 20:46:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:46:10,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:10,983 INFO L499 BasicCegarLoop]: trace histogram [47, 45, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:10,999 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 20:46:11,207 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,SelfDestructingSolverStorable46 [2022-04-06 20:46:11,207 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 187652979, now seen corresponding path program 87 times [2022-04-06 20:46:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [765891771] [2022-04-06 20:46:11,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:11,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:11,209 INFO L85 PathProgramCache]: Analyzing trace with hash 187652979, now seen corresponding path program 88 times [2022-04-06 20:46:11,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:11,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067805209] [2022-04-06 20:46:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:11,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:11,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:11,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067805209] [2022-04-06 20:46:11,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067805209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678130588] [2022-04-06 20:46:11,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:11,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:11,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:11,756 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 20:46:11,757 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 20:46:11,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:46:11,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:11,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 138 proven. 2070 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:13,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678130588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:13,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:13,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 20:46:13,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [765891771] [2022-04-06 20:46:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [765891771] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:13,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:13,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:46:13,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65946411] [2022-04-06 20:46:13,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:13,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:46:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:46:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:46:13,578 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:14,157 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-04-06 20:46:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:46:14,157 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 20:46:14,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:14,171 INFO L225 Difference]: With dead ends: 126 [2022-04-06 20:46:14,171 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:46:14,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:46:14,173 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:14,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 37 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:46:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 20:46:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 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 20:46:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-04-06 20:46:14,177 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 109 [2022-04-06 20:46:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:14,177 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-04-06 20:46:14,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.122448979591837) internal successors, (104), 48 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-04-06 20:46:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:46:14,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:14,178 INFO L499 BasicCegarLoop]: trace histogram [48, 46, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:14,211 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 20:46:14,391 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,SelfDestructingSolverStorable47 [2022-04-06 20:46:14,391 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:14,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1799041584, now seen corresponding path program 89 times [2022-04-06 20:46:14,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465979898] [2022-04-06 20:46:14,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:14,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:14,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1799041584, now seen corresponding path program 90 times [2022-04-06 20:46:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:14,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091405021] [2022-04-06 20:46:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:14,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 141 proven. 2162 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091405021] [2022-04-06 20:46:15,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091405021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:15,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728550524] [2022-04-06 20:46:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:15,100 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 20:46:15,101 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 20:46:15,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:46:15,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:46:15,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2306 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 20:46:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728550524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:15,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 4, 7] total 57 [2022-04-06 20:46:15,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:15,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465979898] [2022-04-06 20:46:15,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465979898] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:15,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:15,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:46:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618446510] [2022-04-06 20:46:15,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:15,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:46:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:46:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1805, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:46:15,533 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 20:46:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:16,387 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-04-06 20:46:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:46:16,388 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 111 [2022-04-06 20:46:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:16,388 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:46:16,388 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:46:16,389 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3925, Invalid=6787, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:46:16,389 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:16,389 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 32 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:46:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 20:46:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 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 20:46:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-04-06 20:46:16,393 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 111 [2022-04-06 20:46:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:16,393 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-04-06 20:46:16,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.12) internal successors, (106), 49 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 20:46:16,393 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-04-06 20:46:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:46:16,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:16,394 INFO L499 BasicCegarLoop]: trace histogram [49, 47, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:16,410 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 20:46:16,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:16,611 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:16,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:16,611 INFO L85 PathProgramCache]: Analyzing trace with hash 247930093, now seen corresponding path program 91 times [2022-04-06 20:46:16,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:16,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991726975] [2022-04-06 20:46:16,627 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:16,627 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash 247930093, now seen corresponding path program 92 times [2022-04-06 20:46:16,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:16,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178800144] [2022-04-06 20:46:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:16,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:17,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178800144] [2022-04-06 20:46:17,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178800144] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:17,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139986108] [2022-04-06 20:46:17,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:17,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:17,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:17,415 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 20:46:17,416 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 20:46:17,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:46:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2403 backedges. 144 proven. 2256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:19,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139986108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:19,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:19,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-04-06 20:46:19,863 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:19,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991726975] [2022-04-06 20:46:19,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991726975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:19,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:19,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:46:19,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731668506] [2022-04-06 20:46:19,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:19,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:46:19,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:46:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:46:19,865 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:20,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:20,861 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2022-04-06 20:46:20,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:46:20,861 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 20:46:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:20,862 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:46:20,862 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:46:20,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9606, Invalid=12150, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:46:20,864 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:20,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 52 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:46:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-04-06 20:46:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 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 20:46:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-04-06 20:46:20,868 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 113 [2022-04-06 20:46:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:20,868 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-04-06 20:46:20,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.1176470588235294) internal successors, (108), 50 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-04-06 20:46:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:46:20,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:20,868 INFO L499 BasicCegarLoop]: trace histogram [50, 48, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:20,884 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 20:46:21,087 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,SelfDestructingSolverStorable49 [2022-04-06 20:46:21,087 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:21,088 INFO L85 PathProgramCache]: Analyzing trace with hash 292690122, now seen corresponding path program 93 times [2022-04-06 20:46:21,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:21,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115691724] [2022-04-06 20:46:21,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:21,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash 292690122, now seen corresponding path program 94 times [2022-04-06 20:46:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:21,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421604411] [2022-04-06 20:46:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:21,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:21,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:21,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421604411] [2022-04-06 20:46:21,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421604411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730691153] [2022-04-06 20:46:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:21,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:21,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:21,897 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 20:46:21,897 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 20:46:21,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:21,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:46:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:22,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2502 backedges. 147 proven. 2352 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730691153] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:24,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 20:46:24,001 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115691724] [2022-04-06 20:46:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115691724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:24,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:46:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551913578] [2022-04-06 20:46:24,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:24,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:46:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:46:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:46:24,003 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:25,029 INFO L93 Difference]: Finished difference Result 132 states and 139 transitions. [2022-04-06 20:46:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:46:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 20:46:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:25,030 INFO L225 Difference]: With dead ends: 132 [2022-04-06 20:46:25,030 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:46:25,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:46:25,032 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:25,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 42 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:25,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:46:25,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 20:46:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 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 20:46:25,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-04-06 20:46:25,036 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 115 [2022-04-06 20:46:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:25,036 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-04-06 20:46:25,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.1153846153846154) internal successors, (110), 51 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-04-06 20:46:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:46:25,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:25,036 INFO L499 BasicCegarLoop]: trace histogram [51, 49, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:25,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:25,237 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:25,237 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:25,238 INFO L85 PathProgramCache]: Analyzing trace with hash 357405031, now seen corresponding path program 95 times [2022-04-06 20:46:25,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:25,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [278972309] [2022-04-06 20:46:25,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:25,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash 357405031, now seen corresponding path program 96 times [2022-04-06 20:46:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:25,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749224220] [2022-04-06 20:46:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:25,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 150 proven. 2450 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:26,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749224220] [2022-04-06 20:46:26,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749224220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222314624] [2022-04-06 20:46:26,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:26,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:26,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:26,076 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 20:46:26,077 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 20:46:26,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:26,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:46:26,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:46:26,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2603 backedges. 151 proven. 2 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 20:46:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222314624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:26,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:26,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 4, 7] total 60 [2022-04-06 20:46:26,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:26,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [278972309] [2022-04-06 20:46:26,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [278972309] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:26,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:26,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:46:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232242093] [2022-04-06 20:46:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:26,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:46:26,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:46:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1549, Invalid=1991, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:46:26,556 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 20:46:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:27,679 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-04-06 20:46:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:46:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 117 [2022-04-06 20:46:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:27,680 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:46:27,680 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:46:27,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4399, Invalid=7591, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:46:27,681 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:27,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:46:27,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 20:46:27,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 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 20:46:27,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-04-06 20:46:27,685 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 117 [2022-04-06 20:46:27,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:27,685 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-04-06 20:46:27,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 52 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 20:46:27,685 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-04-06 20:46:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:46:27,685 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:27,685 INFO L499 BasicCegarLoop]: trace histogram [52, 50, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:27,704 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 20:46:27,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:46:27,901 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:27,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1876076860, now seen corresponding path program 97 times [2022-04-06 20:46:27,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:27,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879188103] [2022-04-06 20:46:27,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:27,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1876076860, now seen corresponding path program 98 times [2022-04-06 20:46:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:27,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534211701] [2022-04-06 20:46:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:27,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:28,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:28,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534211701] [2022-04-06 20:46:28,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534211701] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:28,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640285725] [2022-04-06 20:46:28,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:28,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:28,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:28,748 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 20:46:28,748 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 20:46:28,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:28,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:28,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:46:28,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:28,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 153 proven. 2550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:30,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640285725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:30,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:30,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:46:30,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:30,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879188103] [2022-04-06 20:46:30,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879188103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:30,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:30,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:46:30,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900158324] [2022-04-06 20:46:30,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:30,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:46:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:30,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:46:30,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:46:30,748 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:31,484 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-04-06 20:46:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:46:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 20:46:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:31,485 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:46:31,485 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:46:31,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10818, Invalid=13674, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:46:31,487 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:31,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 42 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:46:31,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-04-06 20:46:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 117 states have internal predecessors, (121), 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 20:46:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-04-06 20:46:31,492 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 119 [2022-04-06 20:46:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:31,492 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-04-06 20:46:31,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.111111111111111) internal successors, (114), 53 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-04-06 20:46:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:46:31,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:31,493 INFO L499 BasicCegarLoop]: trace histogram [53, 51, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:31,709 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,SelfDestructingSolverStorable52 [2022-04-06 20:46:31,709 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -768526111, now seen corresponding path program 99 times [2022-04-06 20:46:31,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:31,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1056496277] [2022-04-06 20:46:31,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:31,711 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:31,711 INFO L85 PathProgramCache]: Analyzing trace with hash -768526111, now seen corresponding path program 100 times [2022-04-06 20:46:31,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:31,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521212253] [2022-04-06 20:46:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:32,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:32,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521212253] [2022-04-06 20:46:32,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521212253] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:32,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104268600] [2022-04-06 20:46:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:32,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:32,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:32,301 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 20:46:32,302 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 20:46:32,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:46:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:32,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2811 backedges. 156 proven. 2652 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:34,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104268600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:34,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:34,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 20:46:34,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:34,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1056496277] [2022-04-06 20:46:34,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1056496277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:34,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:34,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:46:34,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744496045] [2022-04-06 20:46:34,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:34,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:46:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:46:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:46:34,644 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:35,634 INFO L93 Difference]: Finished difference Result 138 states and 145 transitions. [2022-04-06 20:46:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:46:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 20:46:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:35,635 INFO L225 Difference]: With dead ends: 138 [2022-04-06 20:46:35,635 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:46:35,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:46:35,636 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:35,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:46:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 20:46:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 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 20:46:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-04-06 20:46:35,640 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 121 [2022-04-06 20:46:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:35,641 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-04-06 20:46:35,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.109090909090909) internal successors, (116), 54 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-04-06 20:46:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:46:35,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:35,641 INFO L499 BasicCegarLoop]: trace histogram [54, 52, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:35,668 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 20:46:35,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:35,854 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:35,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1564145730, now seen corresponding path program 101 times [2022-04-06 20:46:35,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:35,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755403260] [2022-04-06 20:46:35,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:35,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1564145730, now seen corresponding path program 102 times [2022-04-06 20:46:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:35,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915117665] [2022-04-06 20:46:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:35,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 159 proven. 2756 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:36,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915117665] [2022-04-06 20:46:36,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915117665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:36,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211575355] [2022-04-06 20:46:36,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:36,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:36,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:36,791 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 20:46:36,792 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 20:46:36,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:36,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:36,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:46:36,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:46:37,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2918 backedges. 160 proven. 2 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 20:46:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211575355] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:37,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:37,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 4, 7] total 63 [2022-04-06 20:46:37,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:37,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755403260] [2022-04-06 20:46:37,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755403260] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:37,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:37,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:46:37,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447344742] [2022-04-06 20:46:37,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:37,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:46:37,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:37,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:46:37,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1720, Invalid=2186, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:46:37,280 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 20:46:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:38,516 INFO L93 Difference]: Finished difference Result 140 states and 147 transitions. [2022-04-06 20:46:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:46:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 123 [2022-04-06 20:46:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:38,517 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:46:38,517 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 20:46:38,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4900, Invalid=8440, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:46:38,519 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:38,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 52 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 20:46:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-04-06 20:46:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 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 20:46:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-04-06 20:46:38,523 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 123 [2022-04-06 20:46:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:38,523 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-04-06 20:46:38,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 55 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 20:46:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-04-06 20:46:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:46:38,524 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:38,524 INFO L499 BasicCegarLoop]: trace histogram [55, 53, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:38,540 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 20:46:38,724 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,SelfDestructingSolverStorable54 [2022-04-06 20:46:38,725 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1650420901, now seen corresponding path program 103 times [2022-04-06 20:46:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:38,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [893711064] [2022-04-06 20:46:38,727 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:38,727 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:38,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1650420901, now seen corresponding path program 104 times [2022-04-06 20:46:38,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279648717] [2022-04-06 20:46:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:38,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:39,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279648717] [2022-04-06 20:46:39,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279648717] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686928551] [2022-04-06 20:46:39,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:39,505 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 20:46:39,506 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 20:46:39,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:39,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:46:39,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:39,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3027 backedges. 162 proven. 2862 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:41,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686928551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:41,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:41,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:46:41,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [893711064] [2022-04-06 20:46:41,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [893711064] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:41,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:41,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:46:41,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198062137] [2022-04-06 20:46:41,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:41,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:46:41,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:46:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:46:41,953 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:42,991 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-04-06 20:46:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:46:42,992 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 20:46:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:42,993 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:46:42,993 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:46:42,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12102, Invalid=15288, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:46:42,994 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:42,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 52 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:46:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 20:46:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 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 20:46:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-04-06 20:46:42,998 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 125 [2022-04-06 20:46:42,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:42,998 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-04-06 20:46:42,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.1052631578947367) internal successors, (120), 56 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:42,998 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-04-06 20:46:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:46:42,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:42,999 INFO L499 BasicCegarLoop]: trace histogram [56, 54, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:43,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:46:43,214 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,SelfDestructingSolverStorable55 [2022-04-06 20:46:43,215 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1338485688, now seen corresponding path program 105 times [2022-04-06 20:46:43,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:43,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006827616] [2022-04-06 20:46:43,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:43,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:43,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1338485688, now seen corresponding path program 106 times [2022-04-06 20:46:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606527339] [2022-04-06 20:46:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:43,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606527339] [2022-04-06 20:46:43,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606527339] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:43,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13453671] [2022-04-06 20:46:43,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:43,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:43,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:43,979 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 20:46:43,981 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 20:46:44,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:44,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:44,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:46:44,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:44,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3138 backedges. 165 proven. 2970 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:45,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13453671] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:45,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 20:46:45,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:45,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006827616] [2022-04-06 20:46:45,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006827616] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:45,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:45,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:46:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356482827] [2022-04-06 20:46:45,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:45,922 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:46:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:46:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:46:45,923 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:46,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:46,869 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-04-06 20:46:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:46:46,869 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 20:46:46,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:46,870 INFO L225 Difference]: With dead ends: 144 [2022-04-06 20:46:46,870 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:46:46,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:46:46,872 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:46,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 47 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:46:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 20:46:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.032) internal successors, (129), 125 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 20:46:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-04-06 20:46:46,883 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 127 [2022-04-06 20:46:46,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:46,883 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-04-06 20:46:46,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.103448275862069) internal successors, (122), 57 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-04-06 20:46:46,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 20:46:46,884 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:46,884 INFO L499 BasicCegarLoop]: trace histogram [57, 55, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:46,900 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 20:46:47,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:47,100 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:47,100 INFO L85 PathProgramCache]: Analyzing trace with hash 344596693, now seen corresponding path program 107 times [2022-04-06 20:46:47,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:47,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [994827807] [2022-04-06 20:46:47,102 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:47,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 344596693, now seen corresponding path program 108 times [2022-04-06 20:46:47,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:47,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933483325] [2022-04-06 20:46:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:47,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 168 proven. 3080 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:48,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933483325] [2022-04-06 20:46:48,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933483325] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:48,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553612989] [2022-04-06 20:46:48,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:48,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:48,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:48,085 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 20:46:48,085 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 20:46:48,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:46:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:46:48,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3251 backedges. 169 proven. 2 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 20:46:48,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553612989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:48,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:48,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 4, 7] total 66 [2022-04-06 20:46:48,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:48,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [994827807] [2022-04-06 20:46:48,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [994827807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:48,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:48,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:46:48,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620038735] [2022-04-06 20:46:48,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:48,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:46:48,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:46:48,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1900, Invalid=2390, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:46:48,501 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 20:46:49,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:49,751 INFO L93 Difference]: Finished difference Result 146 states and 153 transitions. [2022-04-06 20:46:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:46:49,752 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 129 [2022-04-06 20:46:49,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:49,752 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:46:49,752 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:46:49,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5428, Invalid=9334, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:46:49,754 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:49,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 27 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:49,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:46:49,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 20:46:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 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 20:46:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-04-06 20:46:49,758 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 129 [2022-04-06 20:46:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:49,758 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-04-06 20:46:49,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 58 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 20:46:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-04-06 20:46:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:46:49,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:49,758 INFO L499 BasicCegarLoop]: trace histogram [58, 56, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:49,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:46:49,967 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:49,967 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1299987790, now seen corresponding path program 109 times [2022-04-06 20:46:49,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:49,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233344629] [2022-04-06 20:46:49,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:49,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:49,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1299987790, now seen corresponding path program 110 times [2022-04-06 20:46:49,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:49,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975847182] [2022-04-06 20:46:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:49,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:51,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:51,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975847182] [2022-04-06 20:46:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975847182] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:51,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718176059] [2022-04-06 20:46:51,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:51,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:51,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:51,116 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 20:46:51,117 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 20:46:51,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:46:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:51,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 171 proven. 3192 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:54,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718176059] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:54,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:54,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-04-06 20:46:54,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:54,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233344629] [2022-04-06 20:46:54,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233344629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:54,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:54,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:46:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924290318] [2022-04-06 20:46:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:54,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:46:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:46:54,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:46:54,476 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:55,884 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-04-06 20:46:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:46:55,885 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 20:46:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:55,885 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:46:55,885 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:46:55,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13458, Invalid=16992, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:46:55,887 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:55,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 47 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:46:55,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:46:55,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 20:46:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 129 states have internal predecessors, (133), 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 20:46:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-04-06 20:46:55,891 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 131 [2022-04-06 20:46:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:55,892 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-04-06 20:46:55,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.1) internal successors, (126), 59 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-04-06 20:46:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:46:55,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:55,892 INFO L499 BasicCegarLoop]: trace histogram [59, 57, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:55,917 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 20:46:56,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:56,093 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1197711025, now seen corresponding path program 111 times [2022-04-06 20:46:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:56,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204420237] [2022-04-06 20:46:56,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:56,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:56,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1197711025, now seen corresponding path program 112 times [2022-04-06 20:46:56,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:56,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978075314] [2022-04-06 20:46:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:56,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:57,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978075314] [2022-04-06 20:46:57,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978075314] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821649640] [2022-04-06 20:46:57,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:57,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:57,157 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 20:46:57,157 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 20:46:57,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:57,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:57,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:46:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:46:57,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3483 backedges. 174 proven. 3306 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:00,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821649640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:00,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:00,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 20:47:00,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:00,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204420237] [2022-04-06 20:47:00,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204420237] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:00,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:00,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:47:00,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228985853] [2022-04-06 20:47:00,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:00,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:47:00,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:00,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:47:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:47:00,340 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:01,224 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2022-04-06 20:47:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:47:01,225 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 20:47:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:01,225 INFO L225 Difference]: With dead ends: 150 [2022-04-06 20:47:01,225 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:47:01,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:47:01,227 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:01,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 37 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:47:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-04-06 20:47:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 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 20:47:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-04-06 20:47:01,232 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 133 [2022-04-06 20:47:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:01,232 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-04-06 20:47:01,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 60 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-04-06 20:47:01,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 20:47:01,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:01,233 INFO L499 BasicCegarLoop]: trace histogram [60, 58, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:01,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:01,447 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,SelfDestructingSolverStorable59 [2022-04-06 20:47:01,447 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1693987668, now seen corresponding path program 113 times [2022-04-06 20:47:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:01,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [277930664] [2022-04-06 20:47:01,449 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:01,449 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:01,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1693987668, now seen corresponding path program 114 times [2022-04-06 20:47:01,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:01,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762789063] [2022-04-06 20:47:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:01,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:02,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 177 proven. 3422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:02,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762789063] [2022-04-06 20:47:02,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762789063] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:02,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509280750] [2022-04-06 20:47:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:02,456 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 20:47:02,457 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 20:47:02,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:02,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:47:02,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:47:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3602 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 20:47:02,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509280750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:02,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:02,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 4, 7] total 69 [2022-04-06 20:47:02,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:02,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [277930664] [2022-04-06 20:47:02,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [277930664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:02,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:02,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:47:02,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483304524] [2022-04-06 20:47:02,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:02,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:47:02,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:47:02,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2089, Invalid=2603, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:47:02,791 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 20:47:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:03,749 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-04-06 20:47:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:47:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 135 [2022-04-06 20:47:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:03,751 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:47:03,751 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 20:47:03,752 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5983, Invalid=10273, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:47:03,752 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:03,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 47 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 20:47:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 20:47:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 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 20:47:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-04-06 20:47:03,775 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 135 [2022-04-06 20:47:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:03,775 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-04-06 20:47:03,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.096774193548387) internal successors, (130), 61 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 20:47:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-04-06 20:47:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:47:03,775 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:03,776 INFO L499 BasicCegarLoop]: trace histogram [61, 59, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:03,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:03,990 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,SelfDestructingSolverStorable60 [2022-04-06 20:47:03,991 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:03,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1874471735, now seen corresponding path program 115 times [2022-04-06 20:47:03,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:03,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25612235] [2022-04-06 20:47:03,992 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:03,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:03,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1874471735, now seen corresponding path program 116 times [2022-04-06 20:47:03,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:03,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543192845] [2022-04-06 20:47:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:03,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:04,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:04,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 180 proven. 3540 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:04,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543192845] [2022-04-06 20:47:04,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543192845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604875631] [2022-04-06 20:47:04,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:04,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:04,720 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 20:47:04,721 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 20:47:04,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:04,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:47:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 180 proven. 3540 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:04,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3723 backedges. 180 proven. 3540 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:06,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604875631] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:06,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-04-06 20:47:06,993 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:06,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25612235] [2022-04-06 20:47:06,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25612235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:06,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:06,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:47:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960935748] [2022-04-06 20:47:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:06,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:47:06,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:47:06,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:47:06,995 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:08,031 INFO L93 Difference]: Finished difference Result 154 states and 161 transitions. [2022-04-06 20:47:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:47:08,032 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 20:47:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:08,032 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:47:08,032 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:47:08,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14886, Invalid=18786, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:47:08,034 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:08,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 32 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:47:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-04-06 20:47:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 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 20:47:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-04-06 20:47:08,039 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 137 [2022-04-06 20:47:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:08,039 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-04-06 20:47:08,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0952380952380953) internal successors, (132), 62 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-04-06 20:47:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:47:08,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:08,040 INFO L499 BasicCegarLoop]: trace histogram [62, 60, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:08,059 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 20:47:08,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:47:08,257 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:08,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:08,257 INFO L85 PathProgramCache]: Analyzing trace with hash 773999014, now seen corresponding path program 117 times [2022-04-06 20:47:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:08,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1560173431] [2022-04-06 20:47:08,258 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:08,258 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 773999014, now seen corresponding path program 118 times [2022-04-06 20:47:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537553872] [2022-04-06 20:47:08,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:08,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537553872] [2022-04-06 20:47:09,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537553872] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353356023] [2022-04-06 20:47:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:09,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:09,088 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 20:47:09,089 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 20:47:09,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:09,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:09,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:47:09,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:09,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3846 backedges. 183 proven. 3660 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353356023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:12,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 20:47:12,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1560173431] [2022-04-06 20:47:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1560173431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:12,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:12,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:47:12,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015192149] [2022-04-06 20:47:12,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:12,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:47:12,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:47:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:47:12,094 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:13,240 INFO L93 Difference]: Finished difference Result 156 states and 163 transitions. [2022-04-06 20:47:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:47:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 20:47:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:13,240 INFO L225 Difference]: With dead ends: 156 [2022-04-06 20:47:13,240 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:47:13,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:47:13,243 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:13,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 42 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:47:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-04-06 20:47:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 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 20:47:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-04-06 20:47:13,247 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 139 [2022-04-06 20:47:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:13,247 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-04-06 20:47:13,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.09375) internal successors, (134), 63 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-04-06 20:47:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 20:47:13,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:13,248 INFO L499 BasicCegarLoop]: trace histogram [63, 61, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:13,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:47:13,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:13,464 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -961217725, now seen corresponding path program 119 times [2022-04-06 20:47:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350415272] [2022-04-06 20:47:13,465 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:13,465 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:13,466 INFO L85 PathProgramCache]: Analyzing trace with hash -961217725, now seen corresponding path program 120 times [2022-04-06 20:47:13,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:13,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238836981] [2022-04-06 20:47:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:13,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 186 proven. 3782 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:14,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:14,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238836981] [2022-04-06 20:47:14,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238836981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:14,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644211287] [2022-04-06 20:47:14,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:14,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:14,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:14,755 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 20:47:14,756 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 20:47:14,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:14,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:47:14,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:47:15,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3971 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 20:47:15,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644211287] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:15,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:15,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 4, 7] total 72 [2022-04-06 20:47:15,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:15,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350415272] [2022-04-06 20:47:15,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350415272] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:15,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:15,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:47:15,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597781166] [2022-04-06 20:47:15,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:15,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:47:15,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:15,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:47:15,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2287, Invalid=2825, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:47:15,320 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 20:47:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:16,358 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-04-06 20:47:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:47:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 141 [2022-04-06 20:47:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:16,359 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:47:16,359 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 20:47:16,360 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6565, Invalid=11257, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:47:16,361 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:16,361 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 37 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 20:47:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-04-06 20:47:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 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 20:47:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-04-06 20:47:16,376 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 141 [2022-04-06 20:47:16,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:16,376 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-04-06 20:47:16,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 64 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 20:47:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-04-06 20:47:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:47:16,377 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:16,377 INFO L499 BasicCegarLoop]: trace histogram [64, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:16,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:47:16,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:16,592 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:16,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:16,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2057193056, now seen corresponding path program 121 times [2022-04-06 20:47:16,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:16,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480996053] [2022-04-06 20:47:16,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:16,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2057193056, now seen corresponding path program 122 times [2022-04-06 20:47:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361949218] [2022-04-06 20:47:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:17,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361949218] [2022-04-06 20:47:17,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361949218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405099091] [2022-04-06 20:47:17,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:17,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:17,417 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 20:47:17,418 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 20:47:17,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:17,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:47:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:17,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 189 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:21,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405099091] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:21,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:21,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-04-06 20:47:21,458 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:21,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480996053] [2022-04-06 20:47:21,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480996053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:21,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:21,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:47:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859467175] [2022-04-06 20:47:21,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:21,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:47:21,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:21,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:47:21,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:47:21,460 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:22,960 INFO L93 Difference]: Finished difference Result 160 states and 167 transitions. [2022-04-06 20:47:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:47:22,960 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 20:47:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:22,961 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:47:22,961 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:47:22,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2324 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=16386, Invalid=20670, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:47:22,963 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:22,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 42 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:47:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 20:47:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 141 states have internal predecessors, (145), 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 20:47:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-04-06 20:47:22,967 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 143 [2022-04-06 20:47:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:22,967 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-04-06 20:47:22,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 65 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-04-06 20:47:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:47:22,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:22,968 INFO L499 BasicCegarLoop]: trace histogram [65, 63, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:22,984 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 20:47:23,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:47:23,184 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1272468669, now seen corresponding path program 123 times [2022-04-06 20:47:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [772910916] [2022-04-06 20:47:23,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:23,186 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1272468669, now seen corresponding path program 124 times [2022-04-06 20:47:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:23,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126792746] [2022-04-06 20:47:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:23,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:24,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:24,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126792746] [2022-04-06 20:47:24,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126792746] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:24,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037573934] [2022-04-06 20:47:24,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:24,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:24,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:24,027 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 20:47:24,028 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 20:47:24,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:24,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:47:24,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:24,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4227 backedges. 192 proven. 4032 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037573934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:27,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:27,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 20:47:27,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:27,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [772910916] [2022-04-06 20:47:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [772910916] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:27,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:27,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:47:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213375943] [2022-04-06 20:47:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:27,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:47:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:47:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:47:27,369 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:28,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:28,416 INFO L93 Difference]: Finished difference Result 162 states and 169 transitions. [2022-04-06 20:47:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:47:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 20:47:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:28,432 INFO L225 Difference]: With dead ends: 162 [2022-04-06 20:47:28,432 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:47:28,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:47:28,435 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:28,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:47:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-04-06 20:47:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.027972027972028) internal successors, (147), 143 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 20:47:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-04-06 20:47:28,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 145 [2022-04-06 20:47:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:28,441 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-04-06 20:47:28,441 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.08955223880597) internal successors, (140), 66 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:28,441 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-04-06 20:47:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 20:47:28,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:28,442 INFO L499 BasicCegarLoop]: trace histogram [66, 64, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:28,458 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 20:47:28,642 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,SelfDestructingSolverStorable65 [2022-04-06 20:47:28,642 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1326750874, now seen corresponding path program 125 times [2022-04-06 20:47:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:28,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35058881] [2022-04-06 20:47:28,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:28,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1326750874, now seen corresponding path program 126 times [2022-04-06 20:47:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:28,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225044446] [2022-04-06 20:47:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:29,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:29,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 195 proven. 4160 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:29,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225044446] [2022-04-06 20:47:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225044446] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534088253] [2022-04-06 20:47:29,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:29,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:29,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:29,476 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 20:47:29,477 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 20:47:29,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:29,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:47:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:47:29,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4358 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 20:47:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534088253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:29,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:29,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 4, 4] total 72 [2022-04-06 20:47:29,762 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35058881] [2022-04-06 20:47:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35058881] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:29,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:29,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:47:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143823874] [2022-04-06 20:47:29,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:29,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:47:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:47:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:47:29,780 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 20:47:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:30,880 INFO L93 Difference]: Finished difference Result 164 states and 171 transitions. [2022-04-06 20:47:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:47:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 147 [2022-04-06 20:47:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:30,881 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:47:30,881 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 20:47:30,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=7167, Invalid=11465, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:47:30,887 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:30,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 42 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 20:47:30,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-04-06 20:47:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 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 20:47:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-04-06 20:47:30,907 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 147 [2022-04-06 20:47:30,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:30,907 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-04-06 20:47:30,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.088235294117647) internal successors, (142), 67 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 20:47:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-04-06 20:47:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:47:30,908 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:30,908 INFO L499 BasicCegarLoop]: trace histogram [67, 65, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:30,932 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 20:47:31,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:31,124 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:31,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1952342327, now seen corresponding path program 127 times [2022-04-06 20:47:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:31,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1244857541] [2022-04-06 20:47:31,125 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:31,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1952342327, now seen corresponding path program 128 times [2022-04-06 20:47:31,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:31,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382858279] [2022-04-06 20:47:31,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:31,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:31,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 198 proven. 4290 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:32,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382858279] [2022-04-06 20:47:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382858279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:32,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906475806] [2022-04-06 20:47:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:32,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:32,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:32,018 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 20:47:32,019 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 20:47:32,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:32,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:32,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:47:32,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:32,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 198 proven. 4290 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:32,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4491 backedges. 198 proven. 4290 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906475806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:34,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:34,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-04-06 20:47:34,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:34,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1244857541] [2022-04-06 20:47:34,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1244857541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:34,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:34,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:47:34,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949318707] [2022-04-06 20:47:34,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:34,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:47:34,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:47:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:47:34,955 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:36,125 INFO L93 Difference]: Finished difference Result 166 states and 173 transitions. [2022-04-06 20:47:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:47:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 20:47:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:36,126 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:47:36,126 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:47:36,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17958, Invalid=22644, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:47:36,129 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:36,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:47:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 20:47:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 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 20:47:36,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-04-06 20:47:36,133 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 149 [2022-04-06 20:47:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:36,134 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-04-06 20:47:36,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 68 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:36,134 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-04-06 20:47:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:47:36,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:36,134 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:36,151 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 20:47:36,351 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,SelfDestructingSolverStorable67 [2022-04-06 20:47:36,351 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:36,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:36,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1850307220, now seen corresponding path program 129 times [2022-04-06 20:47:36,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:36,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [652305033] [2022-04-06 20:47:36,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:36,352 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1850307220, now seen corresponding path program 130 times [2022-04-06 20:47:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:36,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910756412] [2022-04-06 20:47:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:37,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:37,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910756412] [2022-04-06 20:47:37,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910756412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:37,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331820630] [2022-04-06 20:47:37,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:37,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:37,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:37,225 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 20:47:37,227 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 20:47:37,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:47:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:37,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4626 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:41,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331820630] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:41,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:41,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 20:47:41,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:41,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [652305033] [2022-04-06 20:47:41,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [652305033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:41,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:41,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:47:41,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781653814] [2022-04-06 20:47:41,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:41,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:47:41,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:47:41,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:47:41,939 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:43,783 INFO L93 Difference]: Finished difference Result 168 states and 175 transitions. [2022-04-06 20:47:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:47:43,783 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 20:47:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:43,784 INFO L225 Difference]: With dead ends: 168 [2022-04-06 20:47:43,784 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 20:47:43,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:47:43,786 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:43,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 42 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 20:47:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 20:47:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 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 20:47:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2022-04-06 20:47:43,790 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 151 [2022-04-06 20:47:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:43,790 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2022-04-06 20:47:43,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2022-04-06 20:47:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 20:47:43,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:43,791 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:43,807 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 20:47:43,991 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,SelfDestructingSolverStorable68 [2022-04-06 20:47:43,992 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1716150095, now seen corresponding path program 131 times [2022-04-06 20:47:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727422926] [2022-04-06 20:47:43,994 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:43,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:43,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1716150095, now seen corresponding path program 132 times [2022-04-06 20:47:43,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:43,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367402838] [2022-04-06 20:47:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:43,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:45,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:45,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367402838] [2022-04-06 20:47:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367402838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754383734] [2022-04-06 20:47:45,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:45,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:45,525 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 20:47:45,525 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 20:47:45,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:45,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:47:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:47:45,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4763 backedges. 205 proven. 2 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 20:47:46,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754383734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:46,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:46,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 4, 7] total 78 [2022-04-06 20:47:46,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:46,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727422926] [2022-04-06 20:47:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727422926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:46,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:46,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:47:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145948910] [2022-04-06 20:47:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:46,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:47:46,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:47:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2710, Invalid=3296, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:47:46,140 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 20:47:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:47,899 INFO L93 Difference]: Finished difference Result 170 states and 177 transitions. [2022-04-06 20:47:47,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:47:47,900 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 153 [2022-04-06 20:47:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:47,900 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:47:47,900 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 20:47:47,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2553 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7810, Invalid=13360, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 20:47:47,902 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:47,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 47 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 20:47:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-04-06 20:47:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 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 20:47:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-04-06 20:47:47,907 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 153 [2022-04-06 20:47:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:47,907 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-04-06 20:47:47,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.084507042253521) internal successors, (148), 70 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 20:47:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-04-06 20:47:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:47:47,907 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:47,907 INFO L499 BasicCegarLoop]: trace histogram [70, 68, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:47,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:48,120 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,SelfDestructingSolverStorable69 [2022-04-06 20:47:48,120 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:48,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1697727602, now seen corresponding path program 133 times [2022-04-06 20:47:48,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:48,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970149606] [2022-04-06 20:47:48,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:48,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1697727602, now seen corresponding path program 134 times [2022-04-06 20:47:48,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395257989] [2022-04-06 20:47:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:48,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 207 proven. 4692 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395257989] [2022-04-06 20:47:49,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395257989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:49,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620673706] [2022-04-06 20:47:49,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:49,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:49,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:49,060 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 20:47:49,061 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 20:47:49,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:49,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:49,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:47:49,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 207 proven. 4692 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:49,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 207 proven. 4692 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:52,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620673706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:52,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:52,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-04-06 20:47:52,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:52,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970149606] [2022-04-06 20:47:52,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970149606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:52,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:52,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:47:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408664642] [2022-04-06 20:47:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:52,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:47:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:47:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:47:52,135 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:53,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:53,338 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2022-04-06 20:47:53,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:47:53,338 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 20:47:53,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:53,339 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:47:53,339 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:47:53,341 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19602, Invalid=24708, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:47:53,342 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:53,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 52 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:47:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-04-06 20:47:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 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 20:47:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-04-06 20:47:53,346 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 155 [2022-04-06 20:47:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:53,346 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-04-06 20:47:53,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 71 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:53,347 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-04-06 20:47:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:47:53,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:53,347 INFO L499 BasicCegarLoop]: trace histogram [71, 69, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:53,366 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 20:47:53,563 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,SelfDestructingSolverStorable70 [2022-04-06 20:47:53,564 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:53,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1173581013, now seen corresponding path program 135 times [2022-04-06 20:47:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359166047] [2022-04-06 20:47:53,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:53,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1173581013, now seen corresponding path program 136 times [2022-04-06 20:47:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:53,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125754382] [2022-04-06 20:47:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:54,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:54,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125754382] [2022-04-06 20:47:54,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125754382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:54,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847910944] [2022-04-06 20:47:54,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:54,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:54,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:54,708 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 20:47:54,709 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 20:47:54,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:54,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:47:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:55,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5043 backedges. 210 proven. 4830 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:47:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847910944] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:57,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:57,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 20:47:57,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:57,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359166047] [2022-04-06 20:47:57,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359166047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:57,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:57,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:47:57,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99400684] [2022-04-06 20:47:57,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:57,806 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:47:57,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:47:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:47:57,812 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:59,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:59,305 INFO L93 Difference]: Finished difference Result 174 states and 181 transitions. [2022-04-06 20:47:59,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:47:59,305 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 20:47:59,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:59,306 INFO L225 Difference]: With dead ends: 174 [2022-04-06 20:47:59,306 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:47:59,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:47:59,307 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:59,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 32 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:47:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:47:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-06 20:47:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 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 20:47:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-04-06 20:47:59,312 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 157 [2022-04-06 20:47:59,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:59,312 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-04-06 20:47:59,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0821917808219177) internal successors, (152), 72 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-04-06 20:47:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 20:47:59,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:59,313 INFO L499 BasicCegarLoop]: trace histogram [72, 70, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:59,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:59,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:59,530 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:59,531 INFO L85 PathProgramCache]: Analyzing trace with hash 20117384, now seen corresponding path program 137 times [2022-04-06 20:47:59,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:59,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005802290] [2022-04-06 20:47:59,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:59,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 20117384, now seen corresponding path program 138 times [2022-04-06 20:47:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195255089] [2022-04-06 20:47:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:59,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:00,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 213 proven. 4970 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:00,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195255089] [2022-04-06 20:48:00,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195255089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216543044] [2022-04-06 20:48:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:00,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:00,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:00,938 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 20:48:00,938 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 20:48:00,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:48:00,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:00,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:48:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 214 proven. 2 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:48:01,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5186 backedges. 214 proven. 2 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 20:48:01,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216543044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:01,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:01,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 4, 7] total 81 [2022-04-06 20:48:01,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:01,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005802290] [2022-04-06 20:48:01,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005802290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:01,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:01,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:48:01,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411890296] [2022-04-06 20:48:01,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:01,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:48:01,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:01,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:48:01,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2935, Invalid=3545, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:48:01,320 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 20:48:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:02,603 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2022-04-06 20:48:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:48:02,603 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 159 [2022-04-06 20:48:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:02,604 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:48:02,604 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 20:48:02,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=8473, Invalid=14479, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:48:02,605 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:02,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 42 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 20:48:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 20:48:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0254777070063694) internal successors, (161), 157 states have internal predecessors, (161), 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 20:48:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2022-04-06 20:48:02,610 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 159 [2022-04-06 20:48:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:02,610 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2022-04-06 20:48:02,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.081081081081081) internal successors, (154), 73 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 20:48:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2022-04-06 20:48:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:48:02,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:02,611 INFO L499 BasicCegarLoop]: trace histogram [73, 71, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:02,629 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 20:48:02,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:02,827 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:02,827 INFO L85 PathProgramCache]: Analyzing trace with hash 408008869, now seen corresponding path program 139 times [2022-04-06 20:48:02,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:02,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [339597036] [2022-04-06 20:48:02,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:02,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:02,828 INFO L85 PathProgramCache]: Analyzing trace with hash 408008869, now seen corresponding path program 140 times [2022-04-06 20:48:02,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:02,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025161716] [2022-04-06 20:48:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:02,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:03,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 216 proven. 5112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025161716] [2022-04-06 20:48:03,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025161716] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:03,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694173066] [2022-04-06 20:48:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:03,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:03,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:03,886 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 20:48:03,887 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 20:48:03,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:03,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:48:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 216 proven. 5112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:04,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5331 backedges. 216 proven. 5112 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:07,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694173066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:07,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:07,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-04-06 20:48:07,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [339597036] [2022-04-06 20:48:07,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [339597036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:07,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:07,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:48:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953975011] [2022-04-06 20:48:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:07,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:48:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:48:07,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:48:07,534 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:08,965 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2022-04-06 20:48:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:48:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 20:48:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:08,966 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:48:08,966 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:48:08,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=21318, Invalid=26862, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:48:08,969 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:08,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 32 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:48:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-04-06 20:48:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 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 20:48:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2022-04-06 20:48:09,008 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 161 [2022-04-06 20:48:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:09,009 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2022-04-06 20:48:09,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.08) internal successors, (156), 74 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2022-04-06 20:48:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:48:09,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:09,009 INFO L499 BasicCegarLoop]: trace histogram [74, 72, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:09,034 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 20:48:09,210 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:09,210 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -490428798, now seen corresponding path program 141 times [2022-04-06 20:48:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:09,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401653192] [2022-04-06 20:48:09,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:09,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -490428798, now seen corresponding path program 142 times [2022-04-06 20:48:09,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068967680] [2022-04-06 20:48:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:10,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068967680] [2022-04-06 20:48:10,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068967680] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:10,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313141677] [2022-04-06 20:48:10,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:10,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:10,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:10,312 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 20:48:10,312 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 20:48:10,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:10,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:48:10,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:10,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5478 backedges. 219 proven. 5256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313141677] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:14,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:14,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 20:48:14,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401653192] [2022-04-06 20:48:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401653192] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:14,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:14,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:48:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851176817] [2022-04-06 20:48:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:14,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:48:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:48:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 20:48:14,690 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:16,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:16,053 INFO L93 Difference]: Finished difference Result 180 states and 187 transitions. [2022-04-06 20:48:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:48:16,053 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 20:48:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:16,053 INFO L225 Difference]: With dead ends: 180 [2022-04-06 20:48:16,053 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:48:16,056 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:48:16,056 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:16,056 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 47 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:48:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-04-06 20:48:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 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 20:48:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2022-04-06 20:48:16,061 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 163 [2022-04-06 20:48:16,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:16,061 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2022-04-06 20:48:16,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0789473684210527) internal successors, (158), 75 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2022-04-06 20:48:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 20:48:16,074 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:16,074 INFO L499 BasicCegarLoop]: trace histogram [75, 73, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:16,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:16,287 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,SelfDestructingSolverStorable74 [2022-04-06 20:48:16,287 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash -600600289, now seen corresponding path program 143 times [2022-04-06 20:48:16,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:16,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115255084] [2022-04-06 20:48:16,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:16,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash -600600289, now seen corresponding path program 144 times [2022-04-06 20:48:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335947282] [2022-04-06 20:48:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:16,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:18,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 222 proven. 5402 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:18,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:18,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335947282] [2022-04-06 20:48:18,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335947282] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923953673] [2022-04-06 20:48:18,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:18,091 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 20:48:18,091 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 20:48:18,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:48:18,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:48:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:48:18,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5627 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 20:48:18,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923953673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:18,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:18,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 4, 7] total 84 [2022-04-06 20:48:18,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:18,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115255084] [2022-04-06 20:48:18,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115255084] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:18,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:18,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:48:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949406561] [2022-04-06 20:48:18,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:18,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:48:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:48:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3169, Invalid=3803, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:48:18,582 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 20:48:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:20,641 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2022-04-06 20:48:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:48:20,641 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 165 [2022-04-06 20:48:20,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:20,642 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:48:20,642 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:48:20,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3000 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9163, Invalid=15643, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:48:20,643 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:20,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 47 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:20,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:48:20,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-04-06 20:48:20,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 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 20:48:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-04-06 20:48:20,648 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 165 [2022-04-06 20:48:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:20,648 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-04-06 20:48:20,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 76 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 20:48:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-04-06 20:48:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:48:20,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:20,649 INFO L499 BasicCegarLoop]: trace histogram [76, 74, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:20,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:20,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:20,850 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 898779260, now seen corresponding path program 145 times [2022-04-06 20:48:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:20,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [441477907] [2022-04-06 20:48:20,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:20,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:20,855 INFO L85 PathProgramCache]: Analyzing trace with hash 898779260, now seen corresponding path program 146 times [2022-04-06 20:48:20,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:20,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415203590] [2022-04-06 20:48:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:20,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 225 proven. 5550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:22,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415203590] [2022-04-06 20:48:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415203590] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:22,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336319102] [2022-04-06 20:48:22,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:22,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:22,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:22,650 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 20:48:22,651 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 20:48:22,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:48:22,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 225 proven. 5550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:22,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 225 proven. 5550 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336319102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:27,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-04-06 20:48:27,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [441477907] [2022-04-06 20:48:27,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [441477907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:27,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:27,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:48:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541951039] [2022-04-06 20:48:27,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:27,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:48:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:48:27,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 20:48:27,872 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:29,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:29,360 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2022-04-06 20:48:29,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:48:29,360 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 20:48:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:29,365 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:48:29,366 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:48:29,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3218 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=23106, Invalid=29106, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:48:29,380 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:29,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 42 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:48:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-04-06 20:48:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 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 20:48:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-04-06 20:48:29,388 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 167 [2022-04-06 20:48:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:29,388 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-04-06 20:48:29,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.076923076923077) internal successors, (162), 77 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-04-06 20:48:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:48:29,389 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:29,389 INFO L499 BasicCegarLoop]: trace histogram [77, 75, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:29,413 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 20:48:29,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:29,591 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:29,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1306485607, now seen corresponding path program 147 times [2022-04-06 20:48:29,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:29,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390481983] [2022-04-06 20:48:29,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:29,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1306485607, now seen corresponding path program 148 times [2022-04-06 20:48:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:29,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561644732] [2022-04-06 20:48:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:29,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:29,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:31,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:31,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561644732] [2022-04-06 20:48:31,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561644732] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:31,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042643648] [2022-04-06 20:48:31,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:31,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:31,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:31,438 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 20:48:31,439 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 20:48:31,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:48:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:31,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5931 backedges. 228 proven. 5700 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:35,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042643648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:35,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:35,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 20:48:35,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:35,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390481983] [2022-04-06 20:48:35,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390481983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:35,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:35,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:48:35,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814659962] [2022-04-06 20:48:35,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:35,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:48:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:48:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 20:48:35,244 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:36,726 INFO L93 Difference]: Finished difference Result 186 states and 193 transitions. [2022-04-06 20:48:36,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:48:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 20:48:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:36,728 INFO L225 Difference]: With dead ends: 186 [2022-04-06 20:48:36,731 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:48:36,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:48:36,744 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 87 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:36,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 52 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:48:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-04-06 20:48:36,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 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 20:48:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-04-06 20:48:36,750 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 169 [2022-04-06 20:48:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:36,750 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-04-06 20:48:36,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 78 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:36,750 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-04-06 20:48:36,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 20:48:36,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:36,751 INFO L499 BasicCegarLoop]: trace histogram [78, 76, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:36,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:36,967 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,SelfDestructingSolverStorable77 [2022-04-06 20:48:36,967 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1147821430, now seen corresponding path program 149 times [2022-04-06 20:48:36,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:36,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [638412764] [2022-04-06 20:48:36,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:36,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:36,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1147821430, now seen corresponding path program 150 times [2022-04-06 20:48:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085046543] [2022-04-06 20:48:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:38,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6086 backedges. 231 proven. 5852 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:38,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085046543] [2022-04-06 20:48:38,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085046543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:38,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210160335] [2022-04-06 20:48:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:38,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:38,126 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 20:48:38,127 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 20:48:38,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:48:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:48:38,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6086 backedges. 232 proven. 2 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:48:38,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6086 backedges. 232 proven. 2 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 20:48:38,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210160335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:38,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 4, 7] total 87 [2022-04-06 20:48:38,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [638412764] [2022-04-06 20:48:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [638412764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:38,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:38,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:48:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110714157] [2022-04-06 20:48:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:38,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:48:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:48:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3412, Invalid=4070, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:48:38,505 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 20:48:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:40,341 INFO L93 Difference]: Finished difference Result 188 states and 195 transitions. [2022-04-06 20:48:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:48:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 171 [2022-04-06 20:48:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:40,347 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:48:40,347 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 20:48:40,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9880, Invalid=16852, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:48:40,348 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:40,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 37 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:40,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 20:48:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-06 20:48:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 169 states have internal predecessors, (173), 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 20:48:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 177 transitions. [2022-04-06 20:48:40,361 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 177 transitions. Word has length 171 [2022-04-06 20:48:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:40,361 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 177 transitions. [2022-04-06 20:48:40,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.075) internal successors, (166), 79 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 20:48:40,361 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 177 transitions. [2022-04-06 20:48:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:48:40,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:40,362 INFO L499 BasicCegarLoop]: trace histogram [79, 77, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:40,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:40,579 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,SelfDestructingSolverStorable78 [2022-04-06 20:48:40,579 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:40,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1799838483, now seen corresponding path program 151 times [2022-04-06 20:48:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366068130] [2022-04-06 20:48:40,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:40,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1799838483, now seen corresponding path program 152 times [2022-04-06 20:48:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:40,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943187994] [2022-04-06 20:48:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:40,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:42,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6243 backedges. 234 proven. 6006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:42,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:42,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943187994] [2022-04-06 20:48:42,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943187994] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:42,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34054007] [2022-04-06 20:48:42,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:42,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:42,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:42,520 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 20:48:42,521 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 20:48:42,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:42,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:42,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:48:42,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6243 backedges. 234 proven. 6006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6243 backedges. 234 proven. 6006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:47,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34054007] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:47,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:47,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 20:48:47,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366068130] [2022-04-06 20:48:47,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366068130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:47,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:47,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:48:47,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169906418] [2022-04-06 20:48:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:47,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:48:47,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:48:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:48:47,117 INFO L87 Difference]: Start difference. First operand 174 states and 177 transitions. Second operand has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:49,458 INFO L93 Difference]: Finished difference Result 190 states and 197 transitions. [2022-04-06 20:48:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:48:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 20:48:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:49,459 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:48:49,459 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 20:48:49,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=24966, Invalid=31440, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:48:49,462 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 89 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:49,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 57 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 20:48:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-04-06 20:48:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 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 20:48:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2022-04-06 20:48:49,482 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 173 [2022-04-06 20:48:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:49,482 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2022-04-06 20:48:49,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.074074074074074) internal successors, (168), 80 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2022-04-06 20:48:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:48:49,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:49,483 INFO L499 BasicCegarLoop]: trace histogram [80, 78, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:49,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 20:48:49,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:49,695 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1323001200, now seen corresponding path program 153 times [2022-04-06 20:48:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3824958] [2022-04-06 20:48:49,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:49,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:49,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1323001200, now seen corresponding path program 154 times [2022-04-06 20:48:49,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:49,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503095874] [2022-04-06 20:48:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:51,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6402 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:51,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:51,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503095874] [2022-04-06 20:48:51,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503095874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787103650] [2022-04-06 20:48:51,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:51,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:51,524 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 20:48:51,524 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 20:48:51,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:51,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:48:51,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6402 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:51,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6402 backedges. 237 proven. 6162 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:48:57,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787103650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:57,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:57,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 20:48:57,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3824958] [2022-04-06 20:48:57,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3824958] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:57,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:57,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:48:57,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083942155] [2022-04-06 20:48:57,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:57,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:48:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:48:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 20:48:57,189 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:59,392 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2022-04-06 20:48:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:48:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 20:48:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:59,393 INFO L225 Difference]: With dead ends: 192 [2022-04-06 20:48:59,393 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:48:59,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 20:48:59,396 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:59,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 47 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:48:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:48:59,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-04-06 20:48:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.023121387283237) internal successors, (177), 173 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 20:48:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2022-04-06 20:48:59,401 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 175 [2022-04-06 20:48:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:59,401 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2022-04-06 20:48:59,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:59,401 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2022-04-06 20:48:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 20:48:59,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:59,402 INFO L499 BasicCegarLoop]: trace histogram [81, 79, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:59,417 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 20:48:59,617 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:59,617 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:59,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:59,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1651094387, now seen corresponding path program 155 times [2022-04-06 20:48:59,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:59,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1143818394] [2022-04-06 20:48:59,619 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:59,619 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1651094387, now seen corresponding path program 156 times [2022-04-06 20:48:59,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:59,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074253346] [2022-04-06 20:48:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:59,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:00,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6563 backedges. 240 proven. 6320 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:00,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:00,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074253346] [2022-04-06 20:49:00,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074253346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:00,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974019095] [2022-04-06 20:49:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:00,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:00,888 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 20:49:00,889 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 20:49:00,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:49:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:49:00,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6563 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:49:01,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6563 backedges. 241 proven. 2 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 20:49:01,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974019095] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:01,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:01,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 4, 7] total 90 [2022-04-06 20:49:01,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:01,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1143818394] [2022-04-06 20:49:01,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1143818394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:01,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:01,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:49:01,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255924589] [2022-04-06 20:49:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:01,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:49:01,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:49:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3664, Invalid=4346, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:49:01,356 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 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 20:49:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:03,637 INFO L93 Difference]: Finished difference Result 194 states and 201 transitions. [2022-04-06 20:49:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:49:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 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 177 [2022-04-06 20:49:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:03,638 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:49:03,638 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:49:03,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10624, Invalid=18106, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 20:49:03,640 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:03,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 37 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:03,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:49:03,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-04-06 20:49:03,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 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 20:49:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-04-06 20:49:03,645 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 177 [2022-04-06 20:49:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:03,645 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-04-06 20:49:03,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.072289156626506) internal successors, (172), 82 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 20:49:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-04-06 20:49:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:49:03,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:03,646 INFO L499 BasicCegarLoop]: trace histogram [82, 80, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:03,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:03,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 20:49:03,849 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:03,849 INFO L85 PathProgramCache]: Analyzing trace with hash 691265642, now seen corresponding path program 157 times [2022-04-06 20:49:03,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:03,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355925271] [2022-04-06 20:49:03,850 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:03,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 691265642, now seen corresponding path program 158 times [2022-04-06 20:49:03,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:03,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879547856] [2022-04-06 20:49:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:03,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6726 backedges. 243 proven. 6480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:05,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879547856] [2022-04-06 20:49:05,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879547856] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:05,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686388269] [2022-04-06 20:49:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:05,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:05,646 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:05,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:49:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:49:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6726 backedges. 243 proven. 6480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:05,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6726 backedges. 243 proven. 6480 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:10,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686388269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:10,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:10,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-04-06 20:49:10,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355925271] [2022-04-06 20:49:10,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355925271] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:10,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:10,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:49:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727321169] [2022-04-06 20:49:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:10,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:49:10,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:10,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:49:10,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:49:10,033 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:12,070 INFO L93 Difference]: Finished difference Result 196 states and 203 transitions. [2022-04-06 20:49:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:49:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 20:49:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:12,071 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:49:12,071 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:49:12,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3719 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26898, Invalid=33864, Unknown=0, NotChecked=0, Total=60762 [2022-04-06 20:49:12,074 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:12,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 42 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:49:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 20:49:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0225988700564972) internal successors, (181), 177 states have internal predecessors, (181), 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 20:49:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2022-04-06 20:49:12,082 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 179 [2022-04-06 20:49:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:12,083 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2022-04-06 20:49:12,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 83 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2022-04-06 20:49:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:49:12,083 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:12,083 INFO L499 BasicCegarLoop]: trace histogram [83, 81, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:12,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:12,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:12,284 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1136390407, now seen corresponding path program 159 times [2022-04-06 20:49:12,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:12,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826344360] [2022-04-06 20:49:12,285 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:12,285 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1136390407, now seen corresponding path program 160 times [2022-04-06 20:49:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125940476] [2022-04-06 20:49:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:13,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6891 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:14,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125940476] [2022-04-06 20:49:14,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125940476] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:14,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601685520] [2022-04-06 20:49:14,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:14,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:14,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:14,002 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:14,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:49:14,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:49:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6891 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:14,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6891 backedges. 246 proven. 6642 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:18,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601685520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:18,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:18,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 20:49:18,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826344360] [2022-04-06 20:49:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826344360] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:18,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:18,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:49:18,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585380171] [2022-04-06 20:49:18,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:18,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:49:18,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:49:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 20:49:18,200 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:19,852 INFO L93 Difference]: Finished difference Result 198 states and 205 transitions. [2022-04-06 20:49:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:49:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 20:49:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:19,852 INFO L225 Difference]: With dead ends: 198 [2022-04-06 20:49:19,853 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:49:19,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:49:19,855 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:19,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 47 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:49:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-04-06 20:49:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 179 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 20:49:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-04-06 20:49:19,880 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 181 [2022-04-06 20:49:19,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:19,880 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-04-06 20:49:19,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.070588235294118) internal successors, (176), 84 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:19,880 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-04-06 20:49:19,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 20:49:19,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:19,881 INFO L499 BasicCegarLoop]: trace histogram [84, 82, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:19,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:20,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:20,097 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:20,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -595440028, now seen corresponding path program 161 times [2022-04-06 20:49:20,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1496095643] [2022-04-06 20:49:20,098 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:20,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash -595440028, now seen corresponding path program 162 times [2022-04-06 20:49:20,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:20,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076548484] [2022-04-06 20:49:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:20,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:22,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 249 proven. 6806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:22,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076548484] [2022-04-06 20:49:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076548484] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:22,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769702132] [2022-04-06 20:49:22,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:22,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:22,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:22,120 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:22,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:49:22,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:49:22,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:22,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:49:22,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:49:22,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 250 proven. 2 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 20:49:22,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769702132] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:22,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:22,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 4, 7] total 93 [2022-04-06 20:49:22,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:22,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1496095643] [2022-04-06 20:49:22,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1496095643] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:22,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:22,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:49:22,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141875789] [2022-04-06 20:49:22,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:22,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:49:22,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:49:22,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3925, Invalid=4631, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:49:22,862 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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 20:49:25,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:25,497 INFO L93 Difference]: Finished difference Result 200 states and 207 transitions. [2022-04-06 20:49:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:49:25,498 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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 183 [2022-04-06 20:49:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:25,498 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:49:25,498 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:49:25,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3738 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11395, Invalid=19405, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:49:25,500 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:25,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 32 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:25,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:49:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 20:49:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.022099447513812) internal successors, (185), 181 states have internal predecessors, (185), 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 20:49:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 189 transitions. [2022-04-06 20:49:25,506 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 189 transitions. Word has length 183 [2022-04-06 20:49:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:25,513 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 189 transitions. [2022-04-06 20:49:25,513 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0697674418604652) internal successors, (178), 85 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 20:49:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 189 transitions. [2022-04-06 20:49:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:49:25,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:25,514 INFO L499 BasicCegarLoop]: trace histogram [85, 83, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:25,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 20:49:25,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-06 20:49:25,727 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:25,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1562822785, now seen corresponding path program 163 times [2022-04-06 20:49:25,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:25,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677333284] [2022-04-06 20:49:25,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:25,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1562822785, now seen corresponding path program 164 times [2022-04-06 20:49:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656374200] [2022-04-06 20:49:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:25,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 252 proven. 6972 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:27,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656374200] [2022-04-06 20:49:27,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656374200] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:27,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736826103] [2022-04-06 20:49:27,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:27,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:27,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:27,161 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:27,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:49:27,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:49:27,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 252 proven. 6972 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:27,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:33,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7227 backedges. 252 proven. 6972 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:33,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736826103] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:33,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:33,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-04-06 20:49:33,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:33,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677333284] [2022-04-06 20:49:33,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677333284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:33,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:33,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:49:33,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816942426] [2022-04-06 20:49:33,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:33,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:49:33,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:49:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 20:49:33,903 INFO L87 Difference]: Start difference. First operand 186 states and 189 transitions. Second operand has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:36,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:36,291 INFO L93 Difference]: Finished difference Result 202 states and 209 transitions. [2022-04-06 20:49:36,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:49:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 20:49:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:36,292 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:49:36,292 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:49:36,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=28902, Invalid=36378, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:49:36,294 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:36,294 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 37 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:36,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:49:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 20:49:36,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 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 20:49:36,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2022-04-06 20:49:36,300 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 185 [2022-04-06 20:49:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:36,301 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2022-04-06 20:49:36,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 86 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2022-04-06 20:49:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:49:36,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:36,301 INFO L499 BasicCegarLoop]: trace histogram [86, 84, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:36,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:36,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:36,513 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:36,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1184182110, now seen corresponding path program 165 times [2022-04-06 20:49:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1194712533] [2022-04-06 20:49:36,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:36,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1184182110, now seen corresponding path program 166 times [2022-04-06 20:49:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232298486] [2022-04-06 20:49:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:36,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:38,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7398 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:38,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232298486] [2022-04-06 20:49:38,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232298486] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281694288] [2022-04-06 20:49:38,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:38,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:38,178 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:38,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:49:38,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:38,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:38,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:49:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7398 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:38,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7398 backedges. 255 proven. 7140 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:44,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281694288] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:44,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:44,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 20:49:44,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1194712533] [2022-04-06 20:49:44,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1194712533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:44,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:44,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:49:44,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353117431] [2022-04-06 20:49:44,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:44,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:49:44,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:49:44,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 20:49:44,430 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:46,284 INFO L93 Difference]: Finished difference Result 204 states and 211 transitions. [2022-04-06 20:49:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:49:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 20:49:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:46,286 INFO L225 Difference]: With dead ends: 204 [2022-04-06 20:49:46,286 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:49:46,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:49:46,288 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:46,288 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 62 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:49:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-04-06 20:49:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 185 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 20:49:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 193 transitions. [2022-04-06 20:49:46,297 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 193 transitions. Word has length 187 [2022-04-06 20:49:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:46,297 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 193 transitions. [2022-04-06 20:49:46,297 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 87 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 193 transitions. [2022-04-06 20:49:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 20:49:46,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:46,298 INFO L499 BasicCegarLoop]: trace histogram [87, 85, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:46,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:46,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:46,503 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1912253701, now seen corresponding path program 167 times [2022-04-06 20:49:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117854731] [2022-04-06 20:49:46,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:46,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:46,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1912253701, now seen corresponding path program 168 times [2022-04-06 20:49:46,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:46,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513951575] [2022-04-06 20:49:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7571 backedges. 258 proven. 7310 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:48,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513951575] [2022-04-06 20:49:48,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513951575] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:48,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354956452] [2022-04-06 20:49:48,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:48,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:48,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:48,239 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:48,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:49:48,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:49:48,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:49:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7571 backedges. 259 proven. 2 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:49:48,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7571 backedges. 259 proven. 2 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 20:49:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354956452] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:48,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:48,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 4, 7] total 96 [2022-04-06 20:49:48,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117854731] [2022-04-06 20:49:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117854731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:48,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:48,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:49:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26987950] [2022-04-06 20:49:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:48,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:49:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:49:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4195, Invalid=4925, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:49:48,965 INFO L87 Difference]: Start difference. First operand 190 states and 193 transitions. Second operand has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 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 20:49:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:51,451 INFO L93 Difference]: Finished difference Result 206 states and 213 transitions. [2022-04-06 20:49:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:49:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 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 189 [2022-04-06 20:49:51,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:51,452 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:49:51,452 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:49:51,453 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4002 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12193, Invalid=20749, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 20:49:51,453 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:51,453 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 62 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:49:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-04-06 20:49:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 187 states have internal predecessors, (191), 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 20:49:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2022-04-06 20:49:51,458 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 189 [2022-04-06 20:49:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:51,458 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2022-04-06 20:49:51,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.067415730337079) internal successors, (184), 88 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 20:49:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2022-04-06 20:49:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:49:51,459 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:51,459 INFO L499 BasicCegarLoop]: trace histogram [88, 86, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:51,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:51,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-04-06 20:49:51,675 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1174731944, now seen corresponding path program 169 times [2022-04-06 20:49:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:51,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1612644989] [2022-04-06 20:49:51,676 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:51,676 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1174731944, now seen corresponding path program 170 times [2022-04-06 20:49:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:51,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053594240] [2022-04-06 20:49:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:51,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7746 backedges. 261 proven. 7482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:54,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053594240] [2022-04-06 20:49:54,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053594240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:54,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068276327] [2022-04-06 20:49:54,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:54,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:54,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:54,042 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:54,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:49:54,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:54,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:54,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:49:54,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:54,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7746 backedges. 261 proven. 7482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:54,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7746 backedges. 261 proven. 7482 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:49:59,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068276327] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:59,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:59,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-04-06 20:49:59,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:59,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1612644989] [2022-04-06 20:49:59,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1612644989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:59,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:59,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:49:59,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029442092] [2022-04-06 20:49:59,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:59,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:49:59,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:49:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15578, Invalid=15928, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 20:49:59,371 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:01,696 INFO L93 Difference]: Finished difference Result 208 states and 215 transitions. [2022-04-06 20:50:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:50:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 20:50:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:01,697 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:50:01,697 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:50:01,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4256 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=30978, Invalid=38982, Unknown=0, NotChecked=0, Total=69960 [2022-04-06 20:50:01,699 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:01,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 32 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:01,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:50:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-04-06 20:50:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 189 states have internal predecessors, (193), 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 20:50:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 197 transitions. [2022-04-06 20:50:01,705 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 197 transitions. Word has length 191 [2022-04-06 20:50:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:01,705 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 197 transitions. [2022-04-06 20:50:01,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.066666666666667) internal successors, (186), 89 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 197 transitions. [2022-04-06 20:50:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:50:01,706 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:01,706 INFO L499 BasicCegarLoop]: trace histogram [89, 87, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:01,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 20:50:01,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:01,922 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1085927307, now seen corresponding path program 171 times [2022-04-06 20:50:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:01,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1490689243] [2022-04-06 20:50:01,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:01,924 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1085927307, now seen corresponding path program 172 times [2022-04-06 20:50:01,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:01,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040462537] [2022-04-06 20:50:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:04,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040462537] [2022-04-06 20:50:04,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040462537] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:04,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301155866] [2022-04-06 20:50:04,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:04,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:04,226 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:50:04,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:04,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:04,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:50:04,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:04,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:10,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7923 backedges. 264 proven. 7656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301155866] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:10,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 20:50:10,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:10,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1490689243] [2022-04-06 20:50:10,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1490689243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:10,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:10,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:50:10,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613763651] [2022-04-06 20:50:10,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:10,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:50:10,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:10,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:50:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 20:50:10,284 INFO L87 Difference]: Start difference. First operand 194 states and 197 transitions. Second operand has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:12,206 INFO L93 Difference]: Finished difference Result 210 states and 217 transitions. [2022-04-06 20:50:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:50:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 20:50:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:12,207 INFO L225 Difference]: With dead ends: 210 [2022-04-06 20:50:12,207 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 20:50:12,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:50:12,212 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:12,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 32 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 20:50:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-04-06 20:50:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 191 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 20:50:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-04-06 20:50:12,218 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 193 [2022-04-06 20:50:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:12,218 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-04-06 20:50:12,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.065934065934066) internal successors, (188), 90 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-04-06 20:50:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 20:50:12,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:12,219 INFO L499 BasicCegarLoop]: trace histogram [90, 88, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:12,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:12,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:12,438 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:12,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1644017070, now seen corresponding path program 173 times [2022-04-06 20:50:12,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:12,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [898649058] [2022-04-06 20:50:12,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:12,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:12,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1644017070, now seen corresponding path program 174 times [2022-04-06 20:50:12,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:12,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402418665] [2022-04-06 20:50:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:12,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8102 backedges. 267 proven. 7832 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402418665] [2022-04-06 20:50:14,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402418665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:14,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645853624] [2022-04-06 20:50:14,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:14,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:14,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:14,005 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:14,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:50:14,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:50:14,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:50:14,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8102 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:50:14,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8102 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 20:50:14,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645853624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:14,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:14,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 4, 4] total 96 [2022-04-06 20:50:14,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [898649058] [2022-04-06 20:50:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [898649058] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:14,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:14,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:50:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087135691] [2022-04-06 20:50:14,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:14,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:50:14,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:14,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:50:14,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:50:14,410 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 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 20:50:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:16,415 INFO L93 Difference]: Finished difference Result 212 states and 219 transitions. [2022-04-06 20:50:16,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:50:16,415 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 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 195 [2022-04-06 20:50:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:16,416 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:50:16,416 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 20:50:16,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13011, Invalid=21029, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:50:16,417 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:16,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 20:50:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-04-06 20:50:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 193 states have internal predecessors, (197), 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 20:50:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 201 transitions. [2022-04-06 20:50:16,423 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 201 transitions. Word has length 195 [2022-04-06 20:50:16,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:16,423 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 201 transitions. [2022-04-06 20:50:16,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 91 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 20:50:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 201 transitions. [2022-04-06 20:50:16,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:50:16,424 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:16,424 INFO L499 BasicCegarLoop]: trace histogram [91, 89, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:16,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:16,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:16,641 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:16,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:16,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1097367313, now seen corresponding path program 175 times [2022-04-06 20:50:16,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:16,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629119042] [2022-04-06 20:50:16,643 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:16,643 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1097367313, now seen corresponding path program 176 times [2022-04-06 20:50:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:16,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157641384] [2022-04-06 20:50:16,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:18,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:18,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8283 backedges. 270 proven. 8010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:18,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157641384] [2022-04-06 20:50:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157641384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631424899] [2022-04-06 20:50:18,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:18,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:18,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:18,268 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:18,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:50:18,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:50:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8283 backedges. 270 proven. 8010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:18,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8283 backedges. 270 proven. 8010 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631424899] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:23,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:23,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-04-06 20:50:23,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:23,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629119042] [2022-04-06 20:50:23,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629119042] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:23,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:23,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:50:23,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820285121] [2022-04-06 20:50:23,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:23,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:50:23,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:50:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16655, Invalid=17017, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:50:23,612 INFO L87 Difference]: Start difference. First operand 198 states and 201 transitions. Second operand has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:25,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:25,701 INFO L93 Difference]: Finished difference Result 214 states and 221 transitions. [2022-04-06 20:50:25,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:50:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 20:50:25,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:25,702 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:50:25,702 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:50:25,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=33126, Invalid=41676, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:50:25,705 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:25,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 42 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:25,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:50:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-04-06 20:50:25,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 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 20:50:25,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2022-04-06 20:50:25,710 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 197 [2022-04-06 20:50:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:25,710 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2022-04-06 20:50:25,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.064516129032258) internal successors, (192), 92 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:25,711 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2022-04-06 20:50:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:50:25,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:25,711 INFO L499 BasicCegarLoop]: trace histogram [92, 90, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:25,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 20:50:25,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 20:50:25,927 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:25,927 INFO L85 PathProgramCache]: Analyzing trace with hash 247039052, now seen corresponding path program 177 times [2022-04-06 20:50:25,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [763940922] [2022-04-06 20:50:25,928 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:25,928 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 247039052, now seen corresponding path program 178 times [2022-04-06 20:50:25,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:25,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643639029] [2022-04-06 20:50:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:25,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:27,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643639029] [2022-04-06 20:50:27,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643639029] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:27,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566890736] [2022-04-06 20:50:27,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:27,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:27,735 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:27,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:50:27,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:27,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:50:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:28,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:28,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8466 backedges. 273 proven. 8190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:34,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566890736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:34,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:34,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-04-06 20:50:34,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:34,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [763940922] [2022-04-06 20:50:34,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [763940922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:34,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:34,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:50:34,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006592190] [2022-04-06 20:50:34,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:34,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:50:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:50:34,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-04-06 20:50:34,730 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:37,074 INFO L93 Difference]: Finished difference Result 216 states and 223 transitions. [2022-04-06 20:50:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:50:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-04-06 20:50:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:37,099 INFO L225 Difference]: With dead ends: 216 [2022-04-06 20:50:37,099 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:50:37,102 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4634 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=33858, Invalid=42594, Unknown=0, NotChecked=0, Total=76452 [2022-04-06 20:50:37,102 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:37,102 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:50:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-04-06 20:50:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 197 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 20:50:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2022-04-06 20:50:37,107 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 199 [2022-04-06 20:50:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:37,107 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2022-04-06 20:50:37,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 93 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2022-04-06 20:50:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 20:50:37,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:37,108 INFO L499 BasicCegarLoop]: trace histogram [93, 91, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:37,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:37,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:37,325 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:37,325 INFO L85 PathProgramCache]: Analyzing trace with hash -563600279, now seen corresponding path program 179 times [2022-04-06 20:50:37,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:37,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140237267] [2022-04-06 20:50:37,326 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:37,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -563600279, now seen corresponding path program 180 times [2022-04-06 20:50:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234347248] [2022-04-06 20:50:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:39,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8651 backedges. 276 proven. 8372 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:39,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234347248] [2022-04-06 20:50:39,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234347248] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:39,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294124286] [2022-04-06 20:50:39,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:39,833 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:39,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:50:39,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:50:39,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:50:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8651 backedges. 277 proven. 2 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:50:40,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8651 backedges. 277 proven. 2 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 20:50:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294124286] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:40,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 4, 7] total 102 [2022-04-06 20:50:40,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140237267] [2022-04-06 20:50:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140237267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:40,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:50:40,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584259141] [2022-04-06 20:50:40,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:40,401 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:50:40,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:50:40,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4762, Invalid=5540, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:50:40,403 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 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 20:50:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:42,603 INFO L93 Difference]: Finished difference Result 218 states and 225 transitions. [2022-04-06 20:50:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:50:42,604 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 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 201 [2022-04-06 20:50:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:42,604 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:50:42,604 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 20:50:42,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4557 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13870, Invalid=23572, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 20:50:42,606 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:42,606 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 32 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 20:50:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-04-06 20:50:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.020100502512563) internal successors, (203), 199 states have internal predecessors, (203), 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 20:50:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-04-06 20:50:42,611 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 201 [2022-04-06 20:50:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:42,611 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-04-06 20:50:42,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 94 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 20:50:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-04-06 20:50:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:50:42,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:42,612 INFO L499 BasicCegarLoop]: trace histogram [94, 92, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:42,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:42,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:42,815 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:42,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:42,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2096050502, now seen corresponding path program 181 times [2022-04-06 20:50:42,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:42,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809163250] [2022-04-06 20:50:42,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:42,816 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 2096050502, now seen corresponding path program 182 times [2022-04-06 20:50:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:42,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731530373] [2022-04-06 20:50:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:42,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8838 backedges. 279 proven. 8556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:44,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:44,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731530373] [2022-04-06 20:50:44,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731530373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:44,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280188604] [2022-04-06 20:50:44,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:44,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:44,578 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:44,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:50:44,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:44,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:50:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8838 backedges. 279 proven. 8556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:44,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8838 backedges. 279 proven. 8556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:49,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280188604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:49,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:49,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-04-06 20:50:49,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809163250] [2022-04-06 20:50:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809163250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:49,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:49,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:50:49,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567821467] [2022-04-06 20:50:49,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:49,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:50:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:50:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17768, Invalid=18142, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 20:50:49,720 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:52,419 INFO L93 Difference]: Finished difference Result 220 states and 227 transitions. [2022-04-06 20:50:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:50:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 20:50:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:52,420 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:50:52,420 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:50:52,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4829 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=35346, Invalid=44460, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:50:52,422 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 104 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:52,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 62 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:50:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 20:50:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 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 20:50:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 209 transitions. [2022-04-06 20:50:52,428 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 209 transitions. Word has length 203 [2022-04-06 20:50:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:52,428 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 209 transitions. [2022-04-06 20:50:52,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0625) internal successors, (198), 95 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 209 transitions. [2022-04-06 20:50:52,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:50:52,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:52,429 INFO L499 BasicCegarLoop]: trace histogram [95, 93, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:52,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:52,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:52,643 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:52,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1780057373, now seen corresponding path program 183 times [2022-04-06 20:50:52,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:52,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067274896] [2022-04-06 20:50:52,644 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:52,644 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1780057373, now seen corresponding path program 184 times [2022-04-06 20:50:52,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:52,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161877333] [2022-04-06 20:50:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:52,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9027 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:54,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:54,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161877333] [2022-04-06 20:50:54,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161877333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225590178] [2022-04-06 20:50:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:54,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:54,696 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:50:54,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:54,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:54,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:50:54,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9027 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:50:54,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9027 backedges. 282 proven. 8742 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:01,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225590178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:01,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:01,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-04-06 20:51:01,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:01,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067274896] [2022-04-06 20:51:01,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067274896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:01,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:01,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:51:01,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147607265] [2022-04-06 20:51:01,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:01,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:51:01,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:01,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:51:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18147, Invalid=18525, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:51:01,308 INFO L87 Difference]: Start difference. First operand 206 states and 209 transitions. Second operand has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:04,328 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2022-04-06 20:51:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:51:04,328 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 20:51:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:04,329 INFO L225 Difference]: With dead ends: 222 [2022-04-06 20:51:04,329 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 20:51:04,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4928 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=36102, Invalid=45408, Unknown=0, NotChecked=0, Total=81510 [2022-04-06 20:51:04,332 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 105 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:04,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 52 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 20:51:04,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-04-06 20:51:04,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.019704433497537) internal successors, (207), 203 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 20:51:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-04-06 20:51:04,337 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 205 [2022-04-06 20:51:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:04,338 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-04-06 20:51:04,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0618556701030926) internal successors, (200), 96 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-04-06 20:51:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 20:51:04,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:04,339 INFO L499 BasicCegarLoop]: trace histogram [96, 94, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:04,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:04,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:04,551 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:04,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1311887680, now seen corresponding path program 185 times [2022-04-06 20:51:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:04,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290406166] [2022-04-06 20:51:04,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:04,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:04,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1311887680, now seen corresponding path program 186 times [2022-04-06 20:51:04,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:04,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140641740] [2022-04-06 20:51:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:04,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:06,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9218 backedges. 285 proven. 8930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:06,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140641740] [2022-04-06 20:51:06,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140641740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:06,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274265168] [2022-04-06 20:51:06,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:06,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:06,942 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:06,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:51:06,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:51:06,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:06,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:51:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9218 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:51:07,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9218 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 20:51:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274265168] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:07,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:07,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 4, 7] total 105 [2022-04-06 20:51:07,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290406166] [2022-04-06 20:51:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290406166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:07,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:07,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:51:07,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899865346] [2022-04-06 20:51:07,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:07,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:51:07,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:07,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:51:07,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5059, Invalid=5861, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:51:07,610 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 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 20:51:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:10,028 INFO L93 Difference]: Finished difference Result 224 states and 231 transitions. [2022-04-06 20:51:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:51:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 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 207 [2022-04-06 20:51:10,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:10,029 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:51:10,029 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 20:51:10,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4848 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14749, Invalid=25051, Unknown=0, NotChecked=0, Total=39800 [2022-04-06 20:51:10,031 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 106 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:10,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 57 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 20:51:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-06 20:51:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0195121951219512) internal successors, (209), 205 states have internal predecessors, (209), 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 20:51:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2022-04-06 20:51:10,037 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 207 [2022-04-06 20:51:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:10,037 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2022-04-06 20:51:10,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.061224489795918) internal successors, (202), 97 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 20:51:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2022-04-06 20:51:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:51:10,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:10,038 INFO L499 BasicCegarLoop]: trace histogram [97, 95, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:10,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:10,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 20:51:10,251 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash 553714781, now seen corresponding path program 187 times [2022-04-06 20:51:10,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406820296] [2022-04-06 20:51:10,253 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:10,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 553714781, now seen corresponding path program 188 times [2022-04-06 20:51:10,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:10,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536758326] [2022-04-06 20:51:10,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:12,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9411 backedges. 288 proven. 9120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:12,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536758326] [2022-04-06 20:51:12,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536758326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:12,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900628957] [2022-04-06 20:51:12,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:12,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:12,266 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:12,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:51:12,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:12,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:12,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:51:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9411 backedges. 288 proven. 9120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:12,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9411 backedges. 288 proven. 9120 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:17,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900628957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:17,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:17,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-04-06 20:51:17,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:17,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406820296] [2022-04-06 20:51:17,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406820296] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:17,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:17,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:51:17,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041896319] [2022-04-06 20:51:17,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:17,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:51:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:17,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:51:17,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:51:17,848 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:20,539 INFO L93 Difference]: Finished difference Result 226 states and 233 transitions. [2022-04-06 20:51:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:51:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-04-06 20:51:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:20,540 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:51:20,540 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:51:20,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5129 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=37638, Invalid=47334, Unknown=0, NotChecked=0, Total=84972 [2022-04-06 20:51:20,543 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:20,543 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 32 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:51:20,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 20:51:20,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 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 20:51:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-04-06 20:51:20,548 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 209 [2022-04-06 20:51:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:20,548 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-04-06 20:51:20,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0606060606060606) internal successors, (204), 98 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-04-06 20:51:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:51:20,549 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:20,549 INFO L499 BasicCegarLoop]: trace histogram [98, 96, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:20,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:51:20,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:51:20,758 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2093999162, now seen corresponding path program 189 times [2022-04-06 20:51:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:20,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1860796393] [2022-04-06 20:51:20,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:20,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2093999162, now seen corresponding path program 190 times [2022-04-06 20:51:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:20,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703234933] [2022-04-06 20:51:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:22,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9606 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:22,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703234933] [2022-04-06 20:51:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703234933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288857455] [2022-04-06 20:51:22,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:22,939 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:22,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:51:23,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:51:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9606 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9606 backedges. 291 proven. 9312 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:28,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288857455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:28,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:28,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 20:51:28,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:28,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1860796393] [2022-04-06 20:51:28,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1860796393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:28,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:28,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:51:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176999859] [2022-04-06 20:51:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:28,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:51:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:51:28,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19308, Invalid=19698, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 20:51:28,632 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:30,875 INFO L93 Difference]: Finished difference Result 228 states and 235 transitions. [2022-04-06 20:51:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:51:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-04-06 20:51:30,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:30,876 INFO L225 Difference]: With dead ends: 228 [2022-04-06 20:51:30,876 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 20:51:30,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5231 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=38418, Invalid=48312, Unknown=0, NotChecked=0, Total=86730 [2022-04-06 20:51:30,879 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:30,879 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 67 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 20:51:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-04-06 20:51:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0191387559808613) internal successors, (213), 209 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 20:51:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 217 transitions. [2022-04-06 20:51:30,885 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 217 transitions. Word has length 211 [2022-04-06 20:51:30,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:30,885 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 217 transitions. [2022-04-06 20:51:30,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.06) internal successors, (206), 99 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 217 transitions. [2022-04-06 20:51:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 20:51:30,887 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:30,888 INFO L499 BasicCegarLoop]: trace histogram [99, 97, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:30,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:31,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:31,103 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:31,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash 543572183, now seen corresponding path program 191 times [2022-04-06 20:51:31,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:31,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1241585217] [2022-04-06 20:51:31,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:31,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:31,104 INFO L85 PathProgramCache]: Analyzing trace with hash 543572183, now seen corresponding path program 192 times [2022-04-06 20:51:31,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:31,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300544889] [2022-04-06 20:51:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:31,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 294 proven. 9506 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:33,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300544889] [2022-04-06 20:51:33,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300544889] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263659138] [2022-04-06 20:51:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:33,841 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:33,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:51:33,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:51:33,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:33,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:51:33,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:51:34,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9803 backedges. 295 proven. 2 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 20:51:34,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263659138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:34,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 4, 7] total 108 [2022-04-06 20:51:34,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:34,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1241585217] [2022-04-06 20:51:34,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1241585217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:34,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:34,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:51:34,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908700234] [2022-04-06 20:51:34,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:34,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:51:34,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:34,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:51:34,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5365, Invalid=6191, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:51:34,619 INFO L87 Difference]: Start difference. First operand 214 states and 217 transitions. Second operand has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 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 20:51:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:38,220 INFO L93 Difference]: Finished difference Result 230 states and 237 transitions. [2022-04-06 20:51:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:51:38,221 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 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 213 [2022-04-06 20:51:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:38,221 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:51:38,221 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 20:51:38,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15655, Invalid=26575, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 20:51:38,223 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:38,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 62 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:51:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 20:51:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-04-06 20:51:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 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 20:51:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-04-06 20:51:38,229 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 213 [2022-04-06 20:51:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:38,229 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-04-06 20:51:38,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0594059405940595) internal successors, (208), 100 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 20:51:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-04-06 20:51:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:51:38,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:38,230 INFO L499 BasicCegarLoop]: trace histogram [100, 98, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:38,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:38,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:38,431 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 936897076, now seen corresponding path program 193 times [2022-04-06 20:51:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448922169] [2022-04-06 20:51:38,432 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:38,432 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:38,432 INFO L85 PathProgramCache]: Analyzing trace with hash 936897076, now seen corresponding path program 194 times [2022-04-06 20:51:38,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:38,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570448305] [2022-04-06 20:51:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:38,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:41,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 297 proven. 9702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:41,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:41,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570448305] [2022-04-06 20:51:41,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570448305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:41,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530929314] [2022-04-06 20:51:41,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:41,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:41,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:41,208 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:51:41,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:51:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 297 proven. 9702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:41,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 10002 backedges. 297 proven. 9702 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:48,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530929314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:48,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:48,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-04-06 20:51:48,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:48,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448922169] [2022-04-06 20:51:48,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448922169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:48,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:48,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:51:48,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750936068] [2022-04-06 20:51:48,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:48,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:51:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:51:48,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20102, Invalid=20500, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:51:48,142 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:50,531 INFO L93 Difference]: Finished difference Result 232 states and 239 transitions. [2022-04-06 20:51:50,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:51:50,531 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-04-06 20:51:50,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:50,532 INFO L225 Difference]: With dead ends: 232 [2022-04-06 20:51:50,532 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:51:50,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5438 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=40002, Invalid=50298, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:51:50,535 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:50,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 42 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:51:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:51:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-04-06 20:51:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 213 states have internal predecessors, (217), 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 20:51:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 221 transitions. [2022-04-06 20:51:50,541 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 221 transitions. Word has length 215 [2022-04-06 20:51:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:50,541 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 221 transitions. [2022-04-06 20:51:50,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0588235294117645) internal successors, (210), 101 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 221 transitions. [2022-04-06 20:51:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:51:50,542 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:50,542 INFO L499 BasicCegarLoop]: trace histogram [101, 99, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:50,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:50,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:51:50,758 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash 964997201, now seen corresponding path program 195 times [2022-04-06 20:51:50,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:50,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150127722] [2022-04-06 20:51:50,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:50,760 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash 964997201, now seen corresponding path program 196 times [2022-04-06 20:51:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:50,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171483272] [2022-04-06 20:51:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:52,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10203 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171483272] [2022-04-06 20:51:52,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171483272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:52,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886726346] [2022-04-06 20:51:52,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:52,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:52,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:52,707 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:52,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:51:52,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:52,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:52,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:51:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10203 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:51:52,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 10203 backedges. 300 proven. 9900 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:00,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886726346] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:00,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:00,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-04-06 20:52:00,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:00,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150127722] [2022-04-06 20:52:00,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150127722] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:00,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:00,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:52:00,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195634623] [2022-04-06 20:52:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:00,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:52:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:52:00,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2022-04-06 20:52:00,235 INFO L87 Difference]: Start difference. First operand 218 states and 221 transitions. Second operand has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:03,031 INFO L93 Difference]: Finished difference Result 234 states and 241 transitions. [2022-04-06 20:52:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:52:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-04-06 20:52:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:03,032 INFO L225 Difference]: With dead ends: 234 [2022-04-06 20:52:03,032 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 20:52:03,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5543 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=40806, Invalid=51306, Unknown=0, NotChecked=0, Total=92112 [2022-04-06 20:52:03,036 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:03,036 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 42 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 20:52:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-04-06 20:52:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 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 20:52:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-04-06 20:52:03,042 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 217 [2022-04-06 20:52:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:03,042 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-04-06 20:52:03,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.058252427184466) internal successors, (212), 102 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-04-06 20:52:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 20:52:03,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:03,043 INFO L499 BasicCegarLoop]: trace histogram [102, 100, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:03,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:03,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:03,258 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:03,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:03,258 INFO L85 PathProgramCache]: Analyzing trace with hash -2095553746, now seen corresponding path program 197 times [2022-04-06 20:52:03,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [740945213] [2022-04-06 20:52:03,259 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:03,259 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2095553746, now seen corresponding path program 198 times [2022-04-06 20:52:03,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:03,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159722760] [2022-04-06 20:52:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:03,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:03,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:06,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10406 backedges. 303 proven. 10100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:06,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:06,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159722760] [2022-04-06 20:52:06,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159722760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:06,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587138583] [2022-04-06 20:52:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:06,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:06,519 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:06,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:52:06,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:52:06,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:06,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:52:06,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10406 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:52:07,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10406 backedges. 304 proven. 2 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 20:52:07,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587138583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:07,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:07,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 4, 7] total 111 [2022-04-06 20:52:07,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:07,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [740945213] [2022-04-06 20:52:07,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [740945213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:07,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:07,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:52:07,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783933789] [2022-04-06 20:52:07,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:07,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:52:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:52:07,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5680, Invalid=6530, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:52:07,304 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 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 20:52:09,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:09,923 INFO L93 Difference]: Finished difference Result 236 states and 243 transitions. [2022-04-06 20:52:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:52:09,923 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 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 219 [2022-04-06 20:52:09,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:09,927 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:52:09,927 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:52:09,930 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5457 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=16588, Invalid=28144, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 20:52:09,930 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:09,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 67 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:52:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-04-06 20:52:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0184331797235022) internal successors, (221), 217 states have internal predecessors, (221), 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 20:52:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2022-04-06 20:52:09,967 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 219 [2022-04-06 20:52:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:09,967 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2022-04-06 20:52:09,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 103 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 20:52:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2022-04-06 20:52:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:52:09,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:09,969 INFO L499 BasicCegarLoop]: trace histogram [103, 101, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:09,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:10,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:52:10,185 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:10,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1232416053, now seen corresponding path program 199 times [2022-04-06 20:52:10,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:10,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3924483] [2022-04-06 20:52:10,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:10,186 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1232416053, now seen corresponding path program 200 times [2022-04-06 20:52:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:10,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782155740] [2022-04-06 20:52:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10611 backedges. 306 proven. 10302 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782155740] [2022-04-06 20:52:12,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782155740] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:12,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250589875] [2022-04-06 20:52:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:12,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:12,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:12,436 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:12,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:52:12,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:12,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:52:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10611 backedges. 306 proven. 10302 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:12,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10611 backedges. 306 proven. 10302 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250589875] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:19,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:19,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-04-06 20:52:19,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3924483] [2022-04-06 20:52:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3924483] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:19,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:52:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605540034] [2022-04-06 20:52:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:19,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:52:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:52:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21323, Invalid=21733, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 20:52:19,215 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:22,738 INFO L93 Difference]: Finished difference Result 238 states and 245 transitions. [2022-04-06 20:52:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:52:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-04-06 20:52:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:22,739 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:52:22,739 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:52:22,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5756 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=42438, Invalid=53352, Unknown=0, NotChecked=0, Total=95790 [2022-04-06 20:52:22,743 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 113 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:22,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 42 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:52:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-04-06 20:52:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 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 20:52:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2022-04-06 20:52:22,748 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 221 [2022-04-06 20:52:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:22,749 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2022-04-06 20:52:22,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.057142857142857) internal successors, (216), 104 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2022-04-06 20:52:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 20:52:22,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:22,749 INFO L499 BasicCegarLoop]: trace histogram [104, 102, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:22,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:22,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:52:22,965 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:22,966 INFO L85 PathProgramCache]: Analyzing trace with hash -685781208, now seen corresponding path program 201 times [2022-04-06 20:52:22,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:22,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925515908] [2022-04-06 20:52:22,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:22,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:22,967 INFO L85 PathProgramCache]: Analyzing trace with hash -685781208, now seen corresponding path program 202 times [2022-04-06 20:52:22,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:22,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016892558] [2022-04-06 20:52:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:22,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10818 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:25,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:25,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016892558] [2022-04-06 20:52:25,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016892558] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:25,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046046725] [2022-04-06 20:52:25,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:25,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:25,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:25,460 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:25,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:52:25,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:52:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10818 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:25,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10818 backedges. 309 proven. 10506 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:31,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046046725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:31,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:31,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-04-06 20:52:31,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:31,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925515908] [2022-04-06 20:52:31,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925515908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:31,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:31,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:52:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642931025] [2022-04-06 20:52:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:31,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:52:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:52:31,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21738, Invalid=22152, Unknown=0, NotChecked=0, Total=43890 [2022-04-06 20:52:31,773 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:34,467 INFO L93 Difference]: Finished difference Result 240 states and 247 transitions. [2022-04-06 20:52:34,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:52:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-04-06 20:52:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:34,476 INFO L225 Difference]: With dead ends: 240 [2022-04-06 20:52:34,476 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:52:34,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5864 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=43266, Invalid=54390, Unknown=0, NotChecked=0, Total=97656 [2022-04-06 20:52:34,481 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:34,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 37 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:52:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:52:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-04-06 20:52:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0180995475113122) internal successors, (225), 221 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 20:52:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 229 transitions. [2022-04-06 20:52:34,487 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 229 transitions. Word has length 223 [2022-04-06 20:52:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:34,487 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 229 transitions. [2022-04-06 20:52:34,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.056603773584906) internal successors, (218), 105 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 229 transitions. [2022-04-06 20:52:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 20:52:34,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:34,506 INFO L499 BasicCegarLoop]: trace histogram [105, 103, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:34,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:52:34,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 20:52:34,719 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:34,720 INFO L85 PathProgramCache]: Analyzing trace with hash 644294725, now seen corresponding path program 203 times [2022-04-06 20:52:34,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:34,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7144409] [2022-04-06 20:52:34,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:34,721 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash 644294725, now seen corresponding path program 204 times [2022-04-06 20:52:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:34,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890605442] [2022-04-06 20:52:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:34,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:37,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11027 backedges. 312 proven. 10712 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:37,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890605442] [2022-04-06 20:52:37,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890605442] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:37,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942255358] [2022-04-06 20:52:37,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:37,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:37,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:37,589 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:37,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:52:37,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:52:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:52:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11027 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:52:38,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11027 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 20:52:38,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942255358] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:38,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:38,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 4, 7] total 114 [2022-04-06 20:52:38,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:38,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7144409] [2022-04-06 20:52:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7144409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:38,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:38,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:52:38,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746060658] [2022-04-06 20:52:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:38,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:52:38,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:38,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:52:38,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6004, Invalid=6878, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:52:38,444 INFO L87 Difference]: Start difference. First operand 226 states and 229 transitions. Second operand has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 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 20:52:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:41,730 INFO L93 Difference]: Finished difference Result 242 states and 249 transitions. [2022-04-06 20:52:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:52:41,730 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 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 225 [2022-04-06 20:52:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:41,731 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:52:41,731 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:52:41,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5775 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17548, Invalid=29758, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 20:52:41,733 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:41,733 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 42 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:41,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:52:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-04-06 20:52:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 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 20:52:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-04-06 20:52:41,738 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 225 [2022-04-06 20:52:41,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:41,739 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-04-06 20:52:41,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.05607476635514) internal successors, (220), 106 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 20:52:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-04-06 20:52:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:52:41,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:41,739 INFO L499 BasicCegarLoop]: trace histogram [106, 104, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:41,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:41,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:41,955 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:41,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:41,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1052987870, now seen corresponding path program 205 times [2022-04-06 20:52:41,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:41,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1386352592] [2022-04-06 20:52:41,956 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:41,956 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1052987870, now seen corresponding path program 206 times [2022-04-06 20:52:41,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:41,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646139787] [2022-04-06 20:52:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:41,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:44,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 315 proven. 10920 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:44,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646139787] [2022-04-06 20:52:44,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646139787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241015996] [2022-04-06 20:52:44,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:44,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:44,168 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:44,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:52:44,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 106 conjunts are in the unsatisfiable core [2022-04-06 20:52:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 315 proven. 10920 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:44,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11238 backedges. 315 proven. 10920 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:50,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241015996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:50,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:50,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-04-06 20:52:50,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:50,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1386352592] [2022-04-06 20:52:50,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1386352592] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:50,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:50,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 20:52:50,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070761771] [2022-04-06 20:52:50,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:50,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 20:52:50,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 20:52:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:52:50,593 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:53,915 INFO L93 Difference]: Finished difference Result 244 states and 251 transitions. [2022-04-06 20:52:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 20:52:53,915 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-04-06 20:52:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:53,915 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:52:53,915 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:52:53,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=44946, Invalid=56496, Unknown=0, NotChecked=0, Total=101442 [2022-04-06 20:52:53,919 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 116 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:53,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 52 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:52:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:52:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-04-06 20:52:53,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 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 20:52:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-04-06 20:52:53,925 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 227 [2022-04-06 20:52:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:53,925 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-04-06 20:52:53,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0555555555555554) internal successors, (222), 107 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:52:53,925 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-04-06 20:52:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:52:53,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:53,926 INFO L499 BasicCegarLoop]: trace histogram [107, 105, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:53,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:52:54,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:54,139 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:54,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:54,139 INFO L85 PathProgramCache]: Analyzing trace with hash -53989185, now seen corresponding path program 207 times [2022-04-06 20:52:54,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:54,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298689814] [2022-04-06 20:52:54,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:54,140 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash -53989185, now seen corresponding path program 208 times [2022-04-06 20:52:54,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:54,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071346485] [2022-04-06 20:52:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:54,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:56,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11451 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:56,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071346485] [2022-04-06 20:52:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071346485] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:56,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453188615] [2022-04-06 20:52:56,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:56,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:56,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:56,409 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:52:56,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:52:56,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:56,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:56,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:52:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11451 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:52:56,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 11451 backedges. 318 proven. 11130 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453188615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:03,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:03,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-04-06 20:53:03,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:03,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298689814] [2022-04-06 20:53:03,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298689814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:03,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:03,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 20:53:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826429409] [2022-04-06 20:53:03,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:03,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 20:53:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 20:53:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23007, Invalid=23433, Unknown=0, NotChecked=0, Total=46440 [2022-04-06 20:53:03,686 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:06,707 INFO L93 Difference]: Finished difference Result 246 states and 253 transitions. [2022-04-06 20:53:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 20:53:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-04-06 20:53:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:06,708 INFO L225 Difference]: With dead ends: 246 [2022-04-06 20:53:06,708 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:53:06,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6194 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=45798, Invalid=57564, Unknown=0, NotChecked=0, Total=103362 [2022-04-06 20:53:06,711 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:06,711 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 32 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:53:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-04-06 20:53:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0176211453744493) internal successors, (231), 227 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 20:53:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2022-04-06 20:53:06,717 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 229 [2022-04-06 20:53:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:06,717 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2022-04-06 20:53:06,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.055045871559633) internal successors, (224), 108 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2022-04-06 20:53:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:53:06,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:06,718 INFO L499 BasicCegarLoop]: trace histogram [108, 106, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:06,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:53:06,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 20:53:06,923 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:06,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:06,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2088927204, now seen corresponding path program 209 times [2022-04-06 20:53:06,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:06,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [50789199] [2022-04-06 20:53:06,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:06,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2088927204, now seen corresponding path program 210 times [2022-04-06 20:53:06,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:06,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322776490] [2022-04-06 20:53:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:06,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11666 backedges. 321 proven. 11342 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322776490] [2022-04-06 20:53:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322776490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009830673] [2022-04-06 20:53:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:09,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:09,470 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:09,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:53:09,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:53:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:09,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:53:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11666 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:53:09,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:10,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11666 backedges. 322 proven. 2 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:53:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009830673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:10,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:10,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 4, 7] total 117 [2022-04-06 20:53:10,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:10,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [50789199] [2022-04-06 20:53:10,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [50789199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:10,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:10,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 20:53:10,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884645468] [2022-04-06 20:53:10,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:10,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 20:53:10,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:10,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 20:53:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6337, Invalid=7235, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:53:10,011 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 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 20:53:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:12,747 INFO L93 Difference]: Finished difference Result 248 states and 255 transitions. [2022-04-06 20:53:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 20:53:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 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 231 [2022-04-06 20:53:12,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:12,748 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:53:12,748 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 20:53:12,750 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=18535, Invalid=31417, Unknown=0, NotChecked=0, Total=49952 [2022-04-06 20:53:12,750 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:12,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 42 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 20:53:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-04-06 20:53:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.017467248908297) internal successors, (233), 229 states have internal predecessors, (233), 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 20:53:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 237 transitions. [2022-04-06 20:53:12,756 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 237 transitions. Word has length 231 [2022-04-06 20:53:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:12,756 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 237 transitions. [2022-04-06 20:53:12,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0545454545454547) internal successors, (226), 109 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 20:53:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 237 transitions. [2022-04-06 20:53:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:53:12,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:12,757 INFO L499 BasicCegarLoop]: trace histogram [109, 107, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:12,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:12,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:12,972 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:12,973 INFO L85 PathProgramCache]: Analyzing trace with hash 840723513, now seen corresponding path program 211 times [2022-04-06 20:53:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756705072] [2022-04-06 20:53:12,974 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:12,974 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:12,974 INFO L85 PathProgramCache]: Analyzing trace with hash 840723513, now seen corresponding path program 212 times [2022-04-06 20:53:12,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:12,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853710353] [2022-04-06 20:53:12,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:12,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11883 backedges. 324 proven. 11556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:15,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853710353] [2022-04-06 20:53:15,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853710353] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889616932] [2022-04-06 20:53:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:15,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:15,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:15,312 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:15,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:53:15,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:15,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:53:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11883 backedges. 324 proven. 11556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:15,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11883 backedges. 324 proven. 11556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:24,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889616932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:24,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:24,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-04-06 20:53:24,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:24,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756705072] [2022-04-06 20:53:24,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756705072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:24,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:24,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 20:53:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109036212] [2022-04-06 20:53:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:24,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 20:53:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:24,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 20:53:24,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23873, Invalid=24307, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:53:24,745 INFO L87 Difference]: Start difference. First operand 234 states and 237 transitions. Second operand has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:29,161 INFO L93 Difference]: Finished difference Result 250 states and 257 transitions. [2022-04-06 20:53:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:53:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-04-06 20:53:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:29,161 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:53:29,162 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 20:53:29,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6419 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=47526, Invalid=59730, Unknown=0, NotChecked=0, Total=107256 [2022-04-06 20:53:29,165 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:29,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 47 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:53:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 20:53:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-04-06 20:53:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 231 states have internal predecessors, (235), 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 20:53:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2022-04-06 20:53:29,171 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 233 [2022-04-06 20:53:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:29,171 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2022-04-06 20:53:29,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.054054054054054) internal successors, (228), 110 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2022-04-06 20:53:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 20:53:29,172 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:29,172 INFO L499 BasicCegarLoop]: trace histogram [110, 108, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:29,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:29,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:29,388 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:29,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1263483626, now seen corresponding path program 213 times [2022-04-06 20:53:29,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:29,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [10711563] [2022-04-06 20:53:29,390 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:29,390 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1263483626, now seen corresponding path program 214 times [2022-04-06 20:53:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:29,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698020978] [2022-04-06 20:53:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12102 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698020978] [2022-04-06 20:53:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698020978] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344466656] [2022-04-06 20:53:33,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:33,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:33,113 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:33,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:53:33,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:33,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:53:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12102 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:33,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:40,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12102 backedges. 327 proven. 11772 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:40,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344466656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:40,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:40,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-04-06 20:53:40,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:40,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [10711563] [2022-04-06 20:53:40,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [10711563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:40,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:40,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 20:53:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182315630] [2022-04-06 20:53:40,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:40,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 20:53:40,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 20:53:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24312, Invalid=24750, Unknown=0, NotChecked=0, Total=49062 [2022-04-06 20:53:40,414 INFO L87 Difference]: Start difference. First operand 236 states and 239 transitions. Second operand has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:43,624 INFO L93 Difference]: Finished difference Result 252 states and 259 transitions. [2022-04-06 20:53:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:53:43,624 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-04-06 20:53:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:43,625 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:53:43,625 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:53:43,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6533 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=48402, Invalid=60828, Unknown=0, NotChecked=0, Total=109230 [2022-04-06 20:53:43,628 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:43,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 37 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:53:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-04-06 20:53:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0171673819742488) internal successors, (237), 233 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 20:53:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 241 transitions. [2022-04-06 20:53:43,634 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 241 transitions. Word has length 235 [2022-04-06 20:53:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:43,634 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 241 transitions. [2022-04-06 20:53:43,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 111 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:53:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 241 transitions. [2022-04-06 20:53:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 20:53:43,635 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:43,635 INFO L499 BasicCegarLoop]: trace histogram [111, 109, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:43,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:43,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:43,849 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:43,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash -476947789, now seen corresponding path program 215 times [2022-04-06 20:53:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [213371987] [2022-04-06 20:53:43,850 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:43,850 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -476947789, now seen corresponding path program 216 times [2022-04-06 20:53:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:43,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081646478] [2022-04-06 20:53:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:46,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12323 backedges. 330 proven. 11990 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:46,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081646478] [2022-04-06 20:53:46,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081646478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:46,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330823632] [2022-04-06 20:53:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:46,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:46,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:46,302 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:46,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 20:53:46,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:53:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:53:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12323 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:53:46,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12323 backedges. 331 proven. 2 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:53:46,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330823632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:46,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:46,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 4, 7] total 120 [2022-04-06 20:53:46,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:46,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [213371987] [2022-04-06 20:53:46,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [213371987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:46,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:46,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 20:53:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099299782] [2022-04-06 20:53:46,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:46,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 20:53:46,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 20:53:46,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6679, Invalid=7601, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:53:46,828 INFO L87 Difference]: Start difference. First operand 238 states and 241 transitions. Second operand has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 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 20:53:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:49,891 INFO L93 Difference]: Finished difference Result 254 states and 261 transitions. [2022-04-06 20:53:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 20:53:49,891 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 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 237 [2022-04-06 20:53:49,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:49,892 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:53:49,892 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:53:49,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6438 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=19549, Invalid=33121, Unknown=0, NotChecked=0, Total=52670 [2022-04-06 20:53:49,894 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:49,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 42 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:53:49,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:53:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-04-06 20:53:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 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 20:53:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-04-06 20:53:49,901 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 237 [2022-04-06 20:53:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:49,901 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-04-06 20:53:49,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0530973451327434) internal successors, (232), 112 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 20:53:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-04-06 20:53:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:53:49,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:49,902 INFO L499 BasicCegarLoop]: trace histogram [112, 110, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:49,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:50,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-04-06 20:53:50,117 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash -530252528, now seen corresponding path program 217 times [2022-04-06 20:53:50,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:50,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240078456] [2022-04-06 20:53:50,119 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:50,119 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash -530252528, now seen corresponding path program 218 times [2022-04-06 20:53:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:50,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651273675] [2022-04-06 20:53:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:50,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12546 backedges. 333 proven. 12210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651273675] [2022-04-06 20:53:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651273675] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798884980] [2022-04-06 20:53:53,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:53,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:53,831 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:53:53,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 20:53:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 112 conjunts are in the unsatisfiable core [2022-04-06 20:53:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12546 backedges. 333 proven. 12210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:53:54,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12546 backedges. 333 proven. 12210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:01,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798884980] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:01,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:01,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-04-06 20:54:01,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:01,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240078456] [2022-04-06 20:54:01,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240078456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:01,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:01,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 20:54:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045020674] [2022-04-06 20:54:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:01,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 20:54:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:01,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 20:54:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25202, Invalid=25648, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 20:54:01,258 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:04,192 INFO L93 Difference]: Finished difference Result 256 states and 263 transitions. [2022-04-06 20:54:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 20:54:04,192 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-04-06 20:54:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:04,193 INFO L225 Difference]: With dead ends: 256 [2022-04-06 20:54:04,193 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:54:04,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6764 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=50178, Invalid=63054, Unknown=0, NotChecked=0, Total=113232 [2022-04-06 20:54:04,197 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:04,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 42 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:54:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-04-06 20:54:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.0168776371308017) internal successors, (241), 237 states have internal predecessors, (241), 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 20:54:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 245 transitions. [2022-04-06 20:54:04,203 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 245 transitions. Word has length 239 [2022-04-06 20:54:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:04,203 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 245 transitions. [2022-04-06 20:54:04,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 113 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 245 transitions. [2022-04-06 20:54:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 20:54:04,204 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:04,204 INFO L499 BasicCegarLoop]: trace histogram [113, 111, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:04,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:04,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 20:54:04,420 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:04,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash -216499155, now seen corresponding path program 219 times [2022-04-06 20:54:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:04,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333853594] [2022-04-06 20:54:04,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:04,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:04,422 INFO L85 PathProgramCache]: Analyzing trace with hash -216499155, now seen corresponding path program 220 times [2022-04-06 20:54:04,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117938239] [2022-04-06 20:54:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:04,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:06,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12771 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117938239] [2022-04-06 20:54:06,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117938239] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:06,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507529216] [2022-04-06 20:54:06,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:06,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:06,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:06,872 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:06,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 20:54:06,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:06,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:06,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 20:54:06,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12771 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12771 backedges. 336 proven. 12432 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507529216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:14,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:14,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-04-06 20:54:14,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:14,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333853594] [2022-04-06 20:54:14,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333853594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:14,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:14,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 20:54:14,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807744412] [2022-04-06 20:54:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:14,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 20:54:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 20:54:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25653, Invalid=26103, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 20:54:14,379 INFO L87 Difference]: Start difference. First operand 242 states and 245 transitions. Second operand has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:17,378 INFO L93 Difference]: Finished difference Result 258 states and 265 transitions. [2022-04-06 20:54:17,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 20:54:17,378 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-04-06 20:54:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:17,379 INFO L225 Difference]: With dead ends: 258 [2022-04-06 20:54:17,379 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 20:54:17,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=51078, Invalid=64182, Unknown=0, NotChecked=0, Total=115260 [2022-04-06 20:54:17,384 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:17,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 37 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 20:54:17,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-04-06 20:54:17,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 239 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 20:54:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-04-06 20:54:17,390 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 241 [2022-04-06 20:54:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:17,390 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-04-06 20:54:17,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 114 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-04-06 20:54:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 20:54:17,390 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:17,391 INFO L499 BasicCegarLoop]: trace histogram [114, 112, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:17,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:17,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 20:54:17,603 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash 652781578, now seen corresponding path program 221 times [2022-04-06 20:54:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [475124559] [2022-04-06 20:54:17,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:17,605 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash 652781578, now seen corresponding path program 222 times [2022-04-06 20:54:17,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:17,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039747111] [2022-04-06 20:54:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12998 backedges. 339 proven. 12656 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039747111] [2022-04-06 20:54:19,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039747111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:19,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775226655] [2022-04-06 20:54:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:19,922 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:19,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 20:54:19,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:54:19,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:54:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12998 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:54:20,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12998 backedges. 340 proven. 2 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:54:20,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775226655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:20,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:20,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 4, 4] total 120 [2022-04-06 20:54:20,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:20,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [475124559] [2022-04-06 20:54:20,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [475124559] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:20,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:20,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-04-06 20:54:20,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890631777] [2022-04-06 20:54:20,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:20,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-06 20:54:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-06 20:54:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:54:20,645 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 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 20:54:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:23,602 INFO L93 Difference]: Finished difference Result 260 states and 267 transitions. [2022-04-06 20:54:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 20:54:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 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 243 [2022-04-06 20:54:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:23,603 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:54:23,603 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 20:54:23,605 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=20583, Invalid=33473, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 20:54:23,605 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:23,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 52 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:54:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 20:54:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-04-06 20:54:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.016597510373444) internal successors, (245), 241 states have internal predecessors, (245), 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 20:54:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 249 transitions. [2022-04-06 20:54:23,611 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 249 transitions. Word has length 243 [2022-04-06 20:54:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:23,612 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 249 transitions. [2022-04-06 20:54:23,612 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0517241379310347) internal successors, (238), 115 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 20:54:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 249 transitions. [2022-04-06 20:54:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:54:23,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:23,612 INFO L499 BasicCegarLoop]: trace histogram [115, 113, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:23,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:23,816 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 20:54:23,816 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:23,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1487056729, now seen corresponding path program 223 times [2022-04-06 20:54:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:23,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1756551701] [2022-04-06 20:54:23,818 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:23,818 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1487056729, now seen corresponding path program 224 times [2022-04-06 20:54:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029878340] [2022-04-06 20:54:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13227 backedges. 342 proven. 12882 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:27,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029878340] [2022-04-06 20:54:27,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029878340] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:27,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006277127] [2022-04-06 20:54:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:27,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:27,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:27,854 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:54:27,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:27,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:27,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:54:27,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13227 backedges. 342 proven. 12882 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:37,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13227 backedges. 342 proven. 12882 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:37,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006277127] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:37,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:37,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-04-06 20:54:37,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:37,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1756551701] [2022-04-06 20:54:37,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1756551701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:37,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:37,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-04-06 20:54:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644285668] [2022-04-06 20:54:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:37,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 20:54:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:37,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 20:54:37,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26567, Invalid=27025, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:54:37,455 INFO L87 Difference]: Start difference. First operand 246 states and 249 transitions. Second operand has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:40,700 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2022-04-06 20:54:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 20:54:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-04-06 20:54:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:40,702 INFO L225 Difference]: With dead ends: 262 [2022-04-06 20:54:40,702 INFO L226 Difference]: Without dead ends: 248 [2022-04-06 20:54:40,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 721 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7118 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=52902, Invalid=66468, Unknown=0, NotChecked=0, Total=119370 [2022-04-06 20:54:40,705 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 125 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:40,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 57 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-04-06 20:54:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-04-06 20:54:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 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 20:54:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2022-04-06 20:54:40,712 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 245 [2022-04-06 20:54:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:40,712 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2022-04-06 20:54:40,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.051282051282051) internal successors, (240), 116 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2022-04-06 20:54:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-06 20:54:40,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:40,713 INFO L499 BasicCegarLoop]: trace histogram [116, 114, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:40,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:40,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:40,928 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:40,929 INFO L85 PathProgramCache]: Analyzing trace with hash -582334972, now seen corresponding path program 225 times [2022-04-06 20:54:40,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:40,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2147214825] [2022-04-06 20:54:40,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:40,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash -582334972, now seen corresponding path program 226 times [2022-04-06 20:54:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:40,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864902384] [2022-04-06 20:54:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:40,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13458 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:43,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864902384] [2022-04-06 20:54:43,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864902384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:43,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853725048] [2022-04-06 20:54:43,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:43,326 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:43,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:54:43,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:54:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 13458 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:43,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13458 backedges. 345 proven. 13110 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:51,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853725048] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:51,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:51,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 117, 117] total 234 [2022-04-06 20:54:51,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:51,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2147214825] [2022-04-06 20:54:51,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2147214825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:51,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:51,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-04-06 20:54:51,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755111794] [2022-04-06 20:54:51,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:51,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-06 20:54:51,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:51,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-06 20:54:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27030, Invalid=27492, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 20:54:51,442 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:54,704 INFO L93 Difference]: Finished difference Result 264 states and 271 transitions. [2022-04-06 20:54:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 20:54:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-04-06 20:54:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:54,704 INFO L225 Difference]: With dead ends: 264 [2022-04-06 20:54:54,705 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 20:54:54,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=53826, Invalid=67626, Unknown=0, NotChecked=0, Total=121452 [2022-04-06 20:54:54,708 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 126 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:54,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 27 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:54:54,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 20:54:54,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-04-06 20:54:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 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 20:54:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-04-06 20:54:54,714 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 247 [2022-04-06 20:54:54,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:54,714 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-04-06 20:54:54,715 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 117 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:54:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-04-06 20:54:54,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-04-06 20:54:54,715 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:54,715 INFO L499 BasicCegarLoop]: trace histogram [117, 115, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:54,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-04-06 20:54:54,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:54,927 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1271879713, now seen corresponding path program 227 times [2022-04-06 20:54:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [580527650] [2022-04-06 20:54:54,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:54,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1271879713, now seen corresponding path program 228 times [2022-04-06 20:54:54,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:54,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887631252] [2022-04-06 20:54:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13691 backedges. 348 proven. 13340 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:54:57,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887631252] [2022-04-06 20:54:57,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887631252] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:57,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086844605] [2022-04-06 20:54:57,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:57,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:57,745 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:54:57,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:54:57,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:54:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:54:57,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13691 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:54:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13691 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 13340 trivial. 0 not checked. [2022-04-06 20:54:58,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086844605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:58,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:58,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 4, 7] total 126 [2022-04-06 20:54:58,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:58,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [580527650] [2022-04-06 20:54:58,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [580527650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:58,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:58,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-04-06 20:54:58,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450191506] [2022-04-06 20:54:58,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:58,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-04-06 20:54:58,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-04-06 20:54:58,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7390, Invalid=8360, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:54:58,307 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:01,598 INFO L93 Difference]: Finished difference Result 266 states and 273 transitions. [2022-04-06 20:55:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-04-06 20:55:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-04-06 20:55:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:01,599 INFO L225 Difference]: With dead ends: 266 [2022-04-06 20:55:01,599 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 20:55:01,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7137 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=21658, Invalid=36664, Unknown=0, NotChecked=0, Total=58322 [2022-04-06 20:55:01,602 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:01,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 37 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 20:55:01,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-04-06 20:55:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 247 states have internal predecessors, (251), 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 20:55:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-04-06 20:55:01,608 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 249 [2022-04-06 20:55:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:01,608 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-04-06 20:55:01,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0504201680672267) internal successors, (244), 118 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-04-06 20:55:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 20:55:01,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:01,609 INFO L499 BasicCegarLoop]: trace histogram [118, 116, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:01,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:01,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-04-06 20:55:01,814 INFO L403 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:01,815 INFO L85 PathProgramCache]: Analyzing trace with hash 760764158, now seen corresponding path program 229 times [2022-04-06 20:55:01,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:01,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676984121] [2022-04-06 20:55:01,816 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:01,816 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 760764158, now seen corresponding path program 230 times [2022-04-06 20:55:01,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:01,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623430858] [2022-04-06 20:55:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13926 backedges. 351 proven. 13572 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:04,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:04,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623430858] [2022-04-06 20:55:04,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623430858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:04,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169587871] [2022-04-06 20:55:04,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:04,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:04,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:04,401 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:04,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:55:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:04,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:04,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 20:55:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13926 backedges. 351 proven. 13572 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:04,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13926 backedges. 351 proven. 13572 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169587871] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:12,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 119, 119] total 238 [2022-04-06 20:55:12,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:12,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676984121] [2022-04-06 20:55:12,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676984121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:12,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:12,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-04-06 20:55:12,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627321120] [2022-04-06 20:55:12,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:12,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-04-06 20:55:12,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-04-06 20:55:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27968, Invalid=28438, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:55:12,558 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:15,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:15,692 INFO L93 Difference]: Finished difference Result 268 states and 275 transitions. [2022-04-06 20:55:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-04-06 20:55:15,692 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-04-06 20:55:15,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:15,693 INFO L225 Difference]: With dead ends: 268 [2022-04-06 20:55:15,693 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 20:55:15,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7481 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=55698, Invalid=69972, Unknown=0, NotChecked=0, Total=125670 [2022-04-06 20:55:15,698 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:15,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 52 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:15,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 20:55:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-04-06 20:55:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0160642570281124) internal successors, (253), 249 states have internal predecessors, (253), 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 20:55:15,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 257 transitions. [2022-04-06 20:55:15,704 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 257 transitions. Word has length 251 [2022-04-06 20:55:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:15,704 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 257 transitions. [2022-04-06 20:55:15,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.05) internal successors, (246), 119 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 257 transitions. [2022-04-06 20:55:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 20:55:15,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:15,705 INFO L499 BasicCegarLoop]: trace histogram [119, 117, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:15,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:15,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:15,924 INFO L403 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash -795012453, now seen corresponding path program 231 times [2022-04-06 20:55:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:15,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884869213] [2022-04-06 20:55:15,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:15,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -795012453, now seen corresponding path program 232 times [2022-04-06 20:55:15,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:15,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601096229] [2022-04-06 20:55:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:15,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:18,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14163 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:18,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601096229] [2022-04-06 20:55:18,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601096229] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:18,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655429016] [2022-04-06 20:55:18,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:18,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:18,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:18,836 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-04-06 20:55:18,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:18,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:18,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 20:55:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14163 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:19,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14163 backedges. 354 proven. 13806 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655429016] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:26,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120, 120] total 240 [2022-04-06 20:55:26,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884869213] [2022-04-06 20:55:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884869213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:26,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-04-06 20:55:26,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560921397] [2022-04-06 20:55:26,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:26,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-04-06 20:55:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-04-06 20:55:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28443, Invalid=28917, Unknown=0, NotChecked=0, Total=57360 [2022-04-06 20:55:26,920 INFO L87 Difference]: Start difference. First operand 254 states and 257 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:30,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:30,147 INFO L93 Difference]: Finished difference Result 270 states and 277 transitions. [2022-04-06 20:55:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-04-06 20:55:30,147 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-04-06 20:55:30,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:30,148 INFO L225 Difference]: With dead ends: 270 [2022-04-06 20:55:30,148 INFO L226 Difference]: Without dead ends: 256 [2022-04-06 20:55:30,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7604 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=56646, Invalid=71160, Unknown=0, NotChecked=0, Total=127806 [2022-04-06 20:55:30,152 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:30,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 42 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-04-06 20:55:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-04-06 20:55:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 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 20:55:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2022-04-06 20:55:30,159 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 253 [2022-04-06 20:55:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:30,159 INFO L478 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2022-04-06 20:55:30,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 120 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2022-04-06 20:55:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-04-06 20:55:30,160 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:30,160 INFO L499 BasicCegarLoop]: trace histogram [120, 118, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:30,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:30,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:30,366 INFO L403 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1247716616, now seen corresponding path program 233 times [2022-04-06 20:55:30,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:30,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [571013072] [2022-04-06 20:55:30,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:30,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1247716616, now seen corresponding path program 234 times [2022-04-06 20:55:30,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:30,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720742738] [2022-04-06 20:55:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:30,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:33,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14402 backedges. 357 proven. 14042 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720742738] [2022-04-06 20:55:33,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720742738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:33,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484538409] [2022-04-06 20:55:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:33,534 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-04-06 20:55:33,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:55:33,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:33,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:55:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14402 backedges. 358 proven. 2 refuted. 0 times theorem prover too weak. 14042 trivial. 0 not checked. [2022-04-06 20:55:34,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14402 backedges. 358 proven. 2 refuted. 0 times theorem prover too weak. 14042 trivial. 0 not checked. [2022-04-06 20:55:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484538409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:34,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:34,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 4, 7] total 129 [2022-04-06 20:55:34,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [571013072] [2022-04-06 20:55:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [571013072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:34,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:34,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-04-06 20:55:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923107829] [2022-04-06 20:55:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:34,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-04-06 20:55:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:34,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-04-06 20:55:34,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7759, Invalid=8753, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:55:34,291 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:37,686 INFO L93 Difference]: Finished difference Result 272 states and 279 transitions. [2022-04-06 20:55:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-04-06 20:55:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-04-06 20:55:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:37,687 INFO L225 Difference]: With dead ends: 272 [2022-04-06 20:55:37,687 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 20:55:37,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7500 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=22753, Invalid=38503, Unknown=0, NotChecked=0, Total=61256 [2022-04-06 20:55:37,690 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 130 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:37,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 47 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 20:55:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-04-06 20:55:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 253 states have (on average 1.0158102766798418) internal successors, (257), 253 states have internal predecessors, (257), 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 20:55:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 261 transitions. [2022-04-06 20:55:37,698 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 261 transitions. Word has length 255 [2022-04-06 20:55:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:37,698 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 261 transitions. [2022-04-06 20:55:37,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0491803278688523) internal successors, (250), 121 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 261 transitions. [2022-04-06 20:55:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-04-06 20:55:37,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:37,699 INFO L499 BasicCegarLoop]: trace histogram [121, 119, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:37,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:37,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:37,915 INFO L403 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:37,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:37,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1790246933, now seen corresponding path program 235 times [2022-04-06 20:55:37,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:37,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464104162] [2022-04-06 20:55:37,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:37,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1790246933, now seen corresponding path program 236 times [2022-04-06 20:55:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643991303] [2022-04-06 20:55:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:37,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:40,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14643 backedges. 360 proven. 14280 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643991303] [2022-04-06 20:55:40,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643991303] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:40,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442601541] [2022-04-06 20:55:40,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:40,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:40,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:40,918 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:40,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-04-06 20:55:40,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:40,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:55:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14643 backedges. 360 proven. 14280 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:41,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14643 backedges. 360 proven. 14280 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:49,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442601541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:49,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:49,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 122, 122] total 244 [2022-04-06 20:55:49,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464104162] [2022-04-06 20:55:49,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464104162] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:49,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:49,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-04-06 20:55:49,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586873906] [2022-04-06 20:55:49,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:49,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-04-06 20:55:49,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-04-06 20:55:49,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29405, Invalid=29887, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 20:55:49,324 INFO L87 Difference]: Start difference. First operand 258 states and 261 transitions. Second operand has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:52,677 INFO L93 Difference]: Finished difference Result 274 states and 281 transitions. [2022-04-06 20:55:52,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-04-06 20:55:52,677 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-04-06 20:55:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:52,678 INFO L225 Difference]: With dead ends: 274 [2022-04-06 20:55:52,678 INFO L226 Difference]: Without dead ends: 260 [2022-04-06 20:55:52,682 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7853 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=58566, Invalid=73566, Unknown=0, NotChecked=0, Total=132132 [2022-04-06 20:55:52,682 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:52,682 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 37 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:55:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-04-06 20:55:52,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-04-06 20:55:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 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 20:55:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-04-06 20:55:52,688 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 257 [2022-04-06 20:55:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:52,689 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-04-06 20:55:52,689 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.048780487804878) internal successors, (252), 122 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:55:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-04-06 20:55:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-04-06 20:55:52,689 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:52,689 INFO L499 BasicCegarLoop]: trace histogram [122, 120, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:52,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:52,906 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:52,906 INFO L403 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:52,906 INFO L85 PathProgramCache]: Analyzing trace with hash 695456242, now seen corresponding path program 237 times [2022-04-06 20:55:52,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:52,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443702357] [2022-04-06 20:55:52,908 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:52,908 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash 695456242, now seen corresponding path program 238 times [2022-04-06 20:55:52,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693159379] [2022-04-06 20:55:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:55,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14886 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:55,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:55,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693159379] [2022-04-06 20:55:55,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693159379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:55,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530825069] [2022-04-06 20:55:55,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:55,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:55,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:55,542 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:55:55,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-04-06 20:55:55,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:55,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 122 conjunts are in the unsatisfiable core [2022-04-06 20:55:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14886 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:55:55,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14886 backedges. 363 proven. 14520 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530825069] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:05,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:05,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 123, 123] total 246 [2022-04-06 20:56:05,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443702357] [2022-04-06 20:56:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443702357] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:05,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:05,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-04-06 20:56:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678085910] [2022-04-06 20:56:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:05,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-04-06 20:56:05,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-04-06 20:56:05,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29892, Invalid=30378, Unknown=0, NotChecked=0, Total=60270 [2022-04-06 20:56:05,686 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:09,203 INFO L93 Difference]: Finished difference Result 276 states and 283 transitions. [2022-04-06 20:56:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-04-06 20:56:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-04-06 20:56:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:09,204 INFO L225 Difference]: With dead ends: 276 [2022-04-06 20:56:09,204 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 20:56:09,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7979 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=59538, Invalid=74784, Unknown=0, NotChecked=0, Total=134322 [2022-04-06 20:56:09,208 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:09,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 37 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 20:56:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-04-06 20:56:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0155642023346303) internal successors, (261), 257 states have internal predecessors, (261), 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 20:56:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 265 transitions. [2022-04-06 20:56:09,215 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 265 transitions. Word has length 259 [2022-04-06 20:56:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:09,215 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 265 transitions. [2022-04-06 20:56:09,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0483870967741935) internal successors, (254), 123 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 265 transitions. [2022-04-06 20:56:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-04-06 20:56:09,216 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:09,216 INFO L499 BasicCegarLoop]: trace histogram [123, 121, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:09,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-04-06 20:56:09,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-04-06 20:56:09,431 INFO L403 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash 868589711, now seen corresponding path program 239 times [2022-04-06 20:56:09,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:09,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [577123697] [2022-04-06 20:56:09,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:09,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:09,433 INFO L85 PathProgramCache]: Analyzing trace with hash 868589711, now seen corresponding path program 240 times [2022-04-06 20:56:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:09,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751404165] [2022-04-06 20:56:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:12,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 366 proven. 14762 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:12,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751404165] [2022-04-06 20:56:12,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751404165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:12,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241586086] [2022-04-06 20:56:12,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:12,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:12,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:12,213 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:12,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-04-06 20:56:12,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:56:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:56:12,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 14762 trivial. 0 not checked. [2022-04-06 20:56:12,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15131 backedges. 367 proven. 2 refuted. 0 times theorem prover too weak. 14762 trivial. 0 not checked. [2022-04-06 20:56:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241586086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:12,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 4, 7] total 132 [2022-04-06 20:56:12,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [577123697] [2022-04-06 20:56:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [577123697] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:12,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-04-06 20:56:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780490219] [2022-04-06 20:56:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:12,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-04-06 20:56:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-04-06 20:56:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8137, Invalid=9155, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 20:56:12,857 INFO L87 Difference]: Start difference. First operand 262 states and 265 transitions. Second operand has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:17,638 INFO L93 Difference]: Finished difference Result 278 states and 285 transitions. [2022-04-06 20:56:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-04-06 20:56:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-04-06 20:56:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:17,639 INFO L225 Difference]: With dead ends: 278 [2022-04-06 20:56:17,639 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 20:56:17,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7872 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=23875, Invalid=40387, Unknown=0, NotChecked=0, Total=64262 [2022-04-06 20:56:17,641 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:17,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 52 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:56:17,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 20:56:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-04-06 20:56:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0154440154440154) internal successors, (263), 259 states have internal predecessors, (263), 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 20:56:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2022-04-06 20:56:17,648 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 261 [2022-04-06 20:56:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:17,648 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2022-04-06 20:56:17,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.048) internal successors, (256), 124 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:17,648 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2022-04-06 20:56:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-04-06 20:56:17,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:17,649 INFO L499 BasicCegarLoop]: trace histogram [124, 122, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:17,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:17,849 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-04-06 20:56:17,849 INFO L403 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -253871124, now seen corresponding path program 241 times [2022-04-06 20:56:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:17,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176220985] [2022-04-06 20:56:17,851 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:17,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash -253871124, now seen corresponding path program 242 times [2022-04-06 20:56:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:17,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606736772] [2022-04-06 20:56:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:17,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:22,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15378 backedges. 369 proven. 15006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:22,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606736772] [2022-04-06 20:56:22,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606736772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:22,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879977116] [2022-04-06 20:56:22,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:22,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:22,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:22,423 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:22,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-04-06 20:56:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 124 conjunts are in the unsatisfiable core [2022-04-06 20:56:22,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15378 backedges. 369 proven. 15006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:22,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 15378 backedges. 369 proven. 15006 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879977116] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:36,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:36,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 125, 125] total 250 [2022-04-06 20:56:36,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:36,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176220985] [2022-04-06 20:56:36,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176220985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:36,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:36,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-04-06 20:56:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028370468] [2022-04-06 20:56:36,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:36,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-04-06 20:56:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:36,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-04-06 20:56:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30878, Invalid=31372, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 20:56:36,918 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:40,513 INFO L93 Difference]: Finished difference Result 280 states and 287 transitions. [2022-04-06 20:56:40,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-04-06 20:56:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-04-06 20:56:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:40,514 INFO L225 Difference]: With dead ends: 280 [2022-04-06 20:56:40,514 INFO L226 Difference]: Without dead ends: 266 [2022-04-06 20:56:40,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8234 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=61506, Invalid=77250, Unknown=0, NotChecked=0, Total=138756 [2022-04-06 20:56:40,519 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:40,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 47 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-04-06 20:56:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2022-04-06 20:56:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0153256704980842) internal successors, (265), 261 states have internal predecessors, (265), 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 20:56:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 269 transitions. [2022-04-06 20:56:40,525 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 269 transitions. Word has length 263 [2022-04-06 20:56:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:40,526 INFO L478 AbstractCegarLoop]: Abstraction has 266 states and 269 transitions. [2022-04-06 20:56:40,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 125 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 269 transitions. [2022-04-06 20:56:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-04-06 20:56:40,526 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:40,526 INFO L499 BasicCegarLoop]: trace histogram [125, 123, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:40,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:40,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:40,727 INFO L403 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:40,728 INFO L85 PathProgramCache]: Analyzing trace with hash -901942263, now seen corresponding path program 243 times [2022-04-06 20:56:40,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:40,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866794217] [2022-04-06 20:56:40,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:40,729 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash -901942263, now seen corresponding path program 244 times [2022-04-06 20:56:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:40,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262429592] [2022-04-06 20:56:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:43,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15627 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:43,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262429592] [2022-04-06 20:56:43,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262429592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:43,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485463259] [2022-04-06 20:56:43,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:43,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:43,981 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:43,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-04-06 20:56:44,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 20:56:44,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15627 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:44,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15627 backedges. 372 proven. 15252 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:53,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485463259] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:53,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:53,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126, 126] total 252 [2022-04-06 20:56:53,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:53,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866794217] [2022-04-06 20:56:53,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866794217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:53,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:53,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-04-06 20:56:53,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668519630] [2022-04-06 20:56:53,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:53,179 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-04-06 20:56:53,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-04-06 20:56:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31377, Invalid=31875, Unknown=0, NotChecked=0, Total=63252 [2022-04-06 20:56:53,185 INFO L87 Difference]: Start difference. First operand 266 states and 269 transitions. Second operand has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:56,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:56,793 INFO L93 Difference]: Finished difference Result 282 states and 289 transitions. [2022-04-06 20:56:56,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-04-06 20:56:56,793 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-04-06 20:56:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:56,794 INFO L225 Difference]: With dead ends: 282 [2022-04-06 20:56:56,794 INFO L226 Difference]: Without dead ends: 268 [2022-04-06 20:56:56,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8363 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=62502, Invalid=78498, Unknown=0, NotChecked=0, Total=141000 [2022-04-06 20:56:56,798 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:56,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 47 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:56:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-04-06 20:56:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-04-06 20:56:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.015209125475285) internal successors, (267), 263 states have internal predecessors, (267), 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 20:56:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 271 transitions. [2022-04-06 20:56:56,805 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 271 transitions. Word has length 265 [2022-04-06 20:56:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:56,805 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 271 transitions. [2022-04-06 20:56:56,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.047244094488189) internal successors, (260), 126 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:56:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 271 transitions. [2022-04-06 20:56:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-04-06 20:56:56,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:56,806 INFO L499 BasicCegarLoop]: trace histogram [126, 124, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:56,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:57,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-04-06 20:56:57,019 INFO L403 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -928048922, now seen corresponding path program 245 times [2022-04-06 20:56:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:57,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [826475065] [2022-04-06 20:56:57,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:57,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:57,021 INFO L85 PathProgramCache]: Analyzing trace with hash -928048922, now seen corresponding path program 246 times [2022-04-06 20:56:57,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:57,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626108683] [2022-04-06 20:56:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:57,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:59,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15878 backedges. 375 proven. 15500 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:56:59,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626108683] [2022-04-06 20:56:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626108683] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471507159] [2022-04-06 20:56:59,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:59,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:59,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:59,918 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:56:59,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-04-06 20:56:59,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:56:59,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:56:59,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15878 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 15500 trivial. 0 not checked. [2022-04-06 20:57:00,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15878 backedges. 376 proven. 2 refuted. 0 times theorem prover too weak. 15500 trivial. 0 not checked. [2022-04-06 20:57:00,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471507159] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:00,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:00,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 4, 7] total 135 [2022-04-06 20:57:00,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [826475065] [2022-04-06 20:57:00,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [826475065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:00,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:00,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-04-06 20:57:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135962345] [2022-04-06 20:57:00,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:00,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-04-06 20:57:00,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-04-06 20:57:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8524, Invalid=9566, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:57:00,518 INFO L87 Difference]: Start difference. First operand 268 states and 271 transitions. Second operand has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:04,150 INFO L93 Difference]: Finished difference Result 284 states and 291 transitions. [2022-04-06 20:57:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-04-06 20:57:04,150 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-04-06 20:57:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:04,150 INFO L225 Difference]: With dead ends: 284 [2022-04-06 20:57:04,150 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 20:57:04,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8253 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=25024, Invalid=42316, Unknown=0, NotChecked=0, Total=67340 [2022-04-06 20:57:04,153 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:04,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 47 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:57:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 20:57:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-04-06 20:57:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0150943396226415) internal successors, (269), 265 states have internal predecessors, (269), 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 20:57:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-04-06 20:57:04,160 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 267 [2022-04-06 20:57:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:04,160 INFO L478 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-04-06 20:57:04,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.046875) internal successors, (262), 127 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-04-06 20:57:04,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-04-06 20:57:04,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:04,161 INFO L499 BasicCegarLoop]: trace histogram [127, 125, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:04,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:04,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-04-06 20:57:04,375 INFO L403 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -246744445, now seen corresponding path program 247 times [2022-04-06 20:57:04,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277202179] [2022-04-06 20:57:04,377 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:04,377 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -246744445, now seen corresponding path program 248 times [2022-04-06 20:57:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049476793] [2022-04-06 20:57:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16131 backedges. 378 proven. 15750 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:07,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049476793] [2022-04-06 20:57:07,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049476793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872885261] [2022-04-06 20:57:07,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:57:07,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:07,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:07,236 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:07,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-04-06 20:57:07,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:57:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:07,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 20:57:07,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16131 backedges. 378 proven. 15750 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16131 backedges. 378 proven. 15750 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872885261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:20,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:20,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 128, 128] total 256 [2022-04-06 20:57:20,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:20,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277202179] [2022-04-06 20:57:20,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277202179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:20,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:20,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-04-06 20:57:20,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285243720] [2022-04-06 20:57:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:20,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-04-06 20:57:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-04-06 20:57:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32387, Invalid=32893, Unknown=0, NotChecked=0, Total=65280 [2022-04-06 20:57:20,884 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:25,110 INFO L93 Difference]: Finished difference Result 286 states and 293 transitions. [2022-04-06 20:57:25,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-04-06 20:57:25,111 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-04-06 20:57:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:25,112 INFO L225 Difference]: With dead ends: 286 [2022-04-06 20:57:25,112 INFO L226 Difference]: Without dead ends: 272 [2022-04-06 20:57:25,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8624 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=64518, Invalid=81024, Unknown=0, NotChecked=0, Total=145542 [2022-04-06 20:57:25,117 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 137 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:25,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 22 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:57:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-04-06 20:57:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-04-06 20:57:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 267 states have internal predecessors, (271), 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 20:57:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2022-04-06 20:57:25,124 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 269 [2022-04-06 20:57:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:25,125 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2022-04-06 20:57:25,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.046511627906977) internal successors, (264), 128 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2022-04-06 20:57:25,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-06 20:57:25,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:25,125 INFO L499 BasicCegarLoop]: trace histogram [128, 126, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:25,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:25,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-04-06 20:57:25,343 INFO L403 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:25,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1651828960, now seen corresponding path program 249 times [2022-04-06 20:57:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1698182761] [2022-04-06 20:57:25,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:25,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:25,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1651828960, now seen corresponding path program 250 times [2022-04-06 20:57:25,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:25,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263594764] [2022-04-06 20:57:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:25,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:28,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16386 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263594764] [2022-04-06 20:57:28,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263594764] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826902173] [2022-04-06 20:57:28,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:28,223 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:28,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-04-06 20:57:28,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 20:57:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16386 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:28,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16386 backedges. 381 proven. 16002 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:37,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826902173] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:37,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:37,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 129, 129] total 258 [2022-04-06 20:57:37,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1698182761] [2022-04-06 20:57:37,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1698182761] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:37,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:37,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-04-06 20:57:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409690940] [2022-04-06 20:57:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:37,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-04-06 20:57:37,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-04-06 20:57:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32898, Invalid=33408, Unknown=0, NotChecked=0, Total=66306 [2022-04-06 20:57:37,940 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:41,878 INFO L93 Difference]: Finished difference Result 288 states and 295 transitions. [2022-04-06 20:57:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-04-06 20:57:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-04-06 20:57:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:41,879 INFO L225 Difference]: With dead ends: 288 [2022-04-06 20:57:41,880 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 20:57:41,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 799 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8756 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=65538, Invalid=82302, Unknown=0, NotChecked=0, Total=147840 [2022-04-06 20:57:41,886 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:41,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 27 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:57:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 20:57:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2022-04-06 20:57:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0148698884758365) internal successors, (273), 269 states have internal predecessors, (273), 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 20:57:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 277 transitions. [2022-04-06 20:57:41,893 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 277 transitions. Word has length 271 [2022-04-06 20:57:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:41,893 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 277 transitions. [2022-04-06 20:57:41,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.046153846153846) internal successors, (266), 129 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 277 transitions. [2022-04-06 20:57:41,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-04-06 20:57:41,894 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:41,895 INFO L499 BasicCegarLoop]: trace histogram [129, 127, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:42,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-04-06 20:57:42,111 INFO L403 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 819770365, now seen corresponding path program 251 times [2022-04-06 20:57:42,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:42,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1157718690] [2022-04-06 20:57:42,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:42,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 819770365, now seen corresponding path program 252 times [2022-04-06 20:57:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:42,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215715042] [2022-04-06 20:57:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:42,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:45,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 384 proven. 16256 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215715042] [2022-04-06 20:57:45,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215715042] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993369912] [2022-04-06 20:57:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:45,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:45,888 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:45,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-04-06 20:57:45,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:57:45,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:57:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 16256 trivial. 0 not checked. [2022-04-06 20:57:46,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16643 backedges. 385 proven. 2 refuted. 0 times theorem prover too weak. 16256 trivial. 0 not checked. [2022-04-06 20:57:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993369912] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:46,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 4, 7] total 138 [2022-04-06 20:57:46,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1157718690] [2022-04-06 20:57:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1157718690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:46,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:46,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-04-06 20:57:46,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741589374] [2022-04-06 20:57:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:46,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-04-06 20:57:46,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-04-06 20:57:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8920, Invalid=9986, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:57:46,482 INFO L87 Difference]: Start difference. First operand 274 states and 277 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:50,225 INFO L93 Difference]: Finished difference Result 290 states and 297 transitions. [2022-04-06 20:57:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-04-06 20:57:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-04-06 20:57:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:50,226 INFO L225 Difference]: With dead ends: 290 [2022-04-06 20:57:50,226 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 20:57:50,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8643 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=26200, Invalid=44290, Unknown=0, NotChecked=0, Total=70490 [2022-04-06 20:57:50,228 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 139 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:50,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 47 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:57:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 20:57:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-04-06 20:57:50,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 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 20:57:50,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-04-06 20:57:50,235 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 273 [2022-04-06 20:57:50,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:50,235 INFO L478 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-04-06 20:57:50,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 130 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:57:50,235 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-04-06 20:57:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-04-06 20:57:50,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:50,236 INFO L499 BasicCegarLoop]: trace histogram [130, 128, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:50,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:50,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:50,452 INFO L403 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash 75377626, now seen corresponding path program 253 times [2022-04-06 20:57:50,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328063196] [2022-04-06 20:57:50,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:50,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 75377626, now seen corresponding path program 254 times [2022-04-06 20:57:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:50,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036255131] [2022-04-06 20:57:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:53,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16902 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:53,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036255131] [2022-04-06 20:57:53,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036255131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522188712] [2022-04-06 20:57:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:57:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:53,553 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:57:53,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-04-06 20:57:53,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:57:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:53,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 130 conjunts are in the unsatisfiable core [2022-04-06 20:57:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16902 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:57:53,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16902 backedges. 387 proven. 16512 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:06,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522188712] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:06,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:06,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 131, 131] total 262 [2022-04-06 20:58:06,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328063196] [2022-04-06 20:58:06,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328063196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:06,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:06,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-04-06 20:58:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289748685] [2022-04-06 20:58:06,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:06,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-04-06 20:58:06,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-04-06 20:58:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33932, Invalid=34450, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 20:58:06,386 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:11,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:11,333 INFO L93 Difference]: Finished difference Result 292 states and 299 transitions. [2022-04-06 20:58:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-04-06 20:58:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-04-06 20:58:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:11,334 INFO L225 Difference]: With dead ends: 292 [2022-04-06 20:58:11,334 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 20:58:11,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=67602, Invalid=84888, Unknown=0, NotChecked=0, Total=152490 [2022-04-06 20:58:11,340 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:11,340 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 37 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:11,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 20:58:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-04-06 20:58:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.0146520146520146) internal successors, (277), 273 states have internal predecessors, (277), 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 20:58:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 281 transitions. [2022-04-06 20:58:11,347 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 281 transitions. Word has length 275 [2022-04-06 20:58:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:11,347 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 281 transitions. [2022-04-06 20:58:11,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0454545454545454) internal successors, (270), 131 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 281 transitions. [2022-04-06 20:58:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-06 20:58:11,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:11,348 INFO L499 BasicCegarLoop]: trace histogram [131, 129, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:11,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:11,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:11,552 INFO L403 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:11,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1973493879, now seen corresponding path program 255 times [2022-04-06 20:58:11,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:11,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345368140] [2022-04-06 20:58:11,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:11,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1973493879, now seen corresponding path program 256 times [2022-04-06 20:58:11,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:11,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85056832] [2022-04-06 20:58:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:11,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85056832] [2022-04-06 20:58:14,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85056832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:14,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516670193] [2022-04-06 20:58:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:58:14,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:14,760 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:14,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-04-06 20:58:14,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:58:14,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:58:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:15,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 390 proven. 16770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516670193] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:24,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:24,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 132, 132] total 264 [2022-04-06 20:58:24,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345368140] [2022-04-06 20:58:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345368140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:24,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:24,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-04-06 20:58:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815549454] [2022-04-06 20:58:24,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:24,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-04-06 20:58:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:24,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-04-06 20:58:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34455, Invalid=34977, Unknown=0, NotChecked=0, Total=69432 [2022-04-06 20:58:24,738 INFO L87 Difference]: Start difference. First operand 278 states and 281 transitions. Second operand has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:28,798 INFO L93 Difference]: Finished difference Result 294 states and 301 transitions. [2022-04-06 20:58:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-04-06 20:58:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-04-06 20:58:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:28,799 INFO L225 Difference]: With dead ends: 294 [2022-04-06 20:58:28,799 INFO L226 Difference]: Without dead ends: 280 [2022-04-06 20:58:28,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9158 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=68646, Invalid=86196, Unknown=0, NotChecked=0, Total=154842 [2022-04-06 20:58:28,805 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:28,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 42 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-04-06 20:58:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-04-06 20:58:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0145454545454546) internal successors, (279), 275 states have internal predecessors, (279), 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 20:58:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-04-06 20:58:28,811 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 277 [2022-04-06 20:58:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:28,812 INFO L478 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-04-06 20:58:28,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.045112781954887) internal successors, (272), 132 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-04-06 20:58:28,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-04-06 20:58:28,812 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:28,812 INFO L499 BasicCegarLoop]: trace histogram [132, 130, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:28,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-04-06 20:58:29,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2022-04-06 20:58:29,028 INFO L403 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:29,028 INFO L85 PathProgramCache]: Analyzing trace with hash 702112212, now seen corresponding path program 257 times [2022-04-06 20:58:29,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:29,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402683599] [2022-04-06 20:58:29,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:29,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash 702112212, now seen corresponding path program 258 times [2022-04-06 20:58:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:29,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815978507] [2022-04-06 20:58:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:32,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17426 backedges. 393 proven. 17030 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:32,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815978507] [2022-04-06 20:58:32,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815978507] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:32,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821891624] [2022-04-06 20:58:32,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:58:32,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:32,069 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:32,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-04-06 20:58:32,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:58:32,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:58:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17426 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 17030 trivial. 0 not checked. [2022-04-06 20:58:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17426 backedges. 394 proven. 2 refuted. 0 times theorem prover too weak. 17030 trivial. 0 not checked. [2022-04-06 20:58:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821891624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:32,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 4, 7] total 141 [2022-04-06 20:58:32,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:32,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402683599] [2022-04-06 20:58:32,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402683599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:32,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:32,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-04-06 20:58:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867943450] [2022-04-06 20:58:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:32,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-04-06 20:58:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-04-06 20:58:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9325, Invalid=10415, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:58:32,669 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:37,457 INFO L93 Difference]: Finished difference Result 296 states and 303 transitions. [2022-04-06 20:58:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-04-06 20:58:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-04-06 20:58:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:37,458 INFO L225 Difference]: With dead ends: 296 [2022-04-06 20:58:37,458 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 20:58:37,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9042 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27403, Invalid=46309, Unknown=0, NotChecked=0, Total=73712 [2022-04-06 20:58:37,462 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:37,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 57 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 20:58:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-04-06 20:58:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0144404332129964) internal successors, (281), 277 states have internal predecessors, (281), 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 20:58:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 285 transitions. [2022-04-06 20:58:37,469 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 285 transitions. Word has length 279 [2022-04-06 20:58:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:37,469 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 285 transitions. [2022-04-06 20:58:37,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.044776119402985) internal successors, (274), 133 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 285 transitions. [2022-04-06 20:58:37,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-04-06 20:58:37,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:37,470 INFO L499 BasicCegarLoop]: trace histogram [133, 131, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:37,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:37,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:37,685 INFO L403 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1324957711, now seen corresponding path program 259 times [2022-04-06 20:58:37,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667787758] [2022-04-06 20:58:37,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:37,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:37,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1324957711, now seen corresponding path program 260 times [2022-04-06 20:58:37,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:37,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061462855] [2022-04-06 20:58:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:37,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17691 backedges. 396 proven. 17292 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061462855] [2022-04-06 20:58:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061462855] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:41,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21114522] [2022-04-06 20:58:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:41,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:41,377 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:41,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-04-06 20:58:41,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:58:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17691 backedges. 396 proven. 17292 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:41,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17691 backedges. 396 proven. 17292 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:58:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21114522] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:52,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134, 134] total 268 [2022-04-06 20:58:52,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667787758] [2022-04-06 20:58:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667787758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:52,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-04-06 20:58:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918181207] [2022-04-06 20:58:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:52,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-04-06 20:58:52,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-04-06 20:58:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35513, Invalid=36043, Unknown=0, NotChecked=0, Total=71556 [2022-04-06 20:58:52,186 INFO L87 Difference]: Start difference. First operand 282 states and 285 transitions. Second operand has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:56,730 INFO L93 Difference]: Finished difference Result 298 states and 305 transitions. [2022-04-06 20:58:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-04-06 20:58:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-04-06 20:58:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:56,731 INFO L225 Difference]: With dead ends: 298 [2022-04-06 20:58:56,731 INFO L226 Difference]: Without dead ends: 284 [2022-04-06 20:58:56,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 398 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9431 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=70758, Invalid=88842, Unknown=0, NotChecked=0, Total=159600 [2022-04-06 20:58:56,738 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:56,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 37 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:58:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-04-06 20:58:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-04-06 20:58:56,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.014336917562724) internal successors, (283), 279 states have internal predecessors, (283), 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 20:58:56,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 287 transitions. [2022-04-06 20:58:56,745 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 287 transitions. Word has length 281 [2022-04-06 20:58:56,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:56,745 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 287 transitions. [2022-04-06 20:58:56,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0444444444444443) internal successors, (276), 134 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:58:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 287 transitions. [2022-04-06 20:58:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 20:58:56,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:56,746 INFO L499 BasicCegarLoop]: trace histogram [134, 132, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:56,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:56,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:56,948 INFO L403 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 575998670, now seen corresponding path program 261 times [2022-04-06 20:58:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240572155] [2022-04-06 20:58:56,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:56,950 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash 575998670, now seen corresponding path program 262 times [2022-04-06 20:58:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:56,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923390567] [2022-04-06 20:58:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17958 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:00,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923390567] [2022-04-06 20:59:00,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923390567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:00,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649477363] [2022-04-06 20:59:00,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:00,368 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:00,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-04-06 20:59:00,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:00,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:00,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 134 conjunts are in the unsatisfiable core [2022-04-06 20:59:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:00,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17958 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:00,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:10,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17958 backedges. 399 proven. 17556 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:10,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649477363] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:10,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:10,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 135, 135] total 270 [2022-04-06 20:59:10,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:10,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240572155] [2022-04-06 20:59:10,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240572155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:10,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:10,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-04-06 20:59:10,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111867814] [2022-04-06 20:59:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:10,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-04-06 20:59:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-04-06 20:59:10,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36048, Invalid=36582, Unknown=0, NotChecked=0, Total=72630 [2022-04-06 20:59:10,422 INFO L87 Difference]: Start difference. First operand 284 states and 287 transitions. Second operand has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:14,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:14,658 INFO L93 Difference]: Finished difference Result 300 states and 307 transitions. [2022-04-06 20:59:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-04-06 20:59:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-04-06 20:59:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:14,659 INFO L225 Difference]: With dead ends: 300 [2022-04-06 20:59:14,659 INFO L226 Difference]: Without dead ends: 286 [2022-04-06 20:59:14,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9569 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=71826, Invalid=90180, Unknown=0, NotChecked=0, Total=162006 [2022-04-06 20:59:14,665 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:14,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 42 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-04-06 20:59:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-04-06 20:59:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.0142348754448398) internal successors, (285), 281 states have internal predecessors, (285), 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 20:59:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 289 transitions. [2022-04-06 20:59:14,672 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 289 transitions. Word has length 283 [2022-04-06 20:59:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:14,672 INFO L478 AbstractCegarLoop]: Abstraction has 286 states and 289 transitions. [2022-04-06 20:59:14,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0441176470588234) internal successors, (278), 135 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 289 transitions. [2022-04-06 20:59:14,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-04-06 20:59:14,673 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:14,673 INFO L499 BasicCegarLoop]: trace histogram [135, 133, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:14,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:14,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-04-06 20:59:14,874 INFO L403 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2033980011, now seen corresponding path program 263 times [2022-04-06 20:59:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [524913912] [2022-04-06 20:59:14,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:14,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2033980011, now seen corresponding path program 264 times [2022-04-06 20:59:14,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:14,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511756491] [2022-04-06 20:59:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:18,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18227 backedges. 402 proven. 17822 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511756491] [2022-04-06 20:59:18,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511756491] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252456997] [2022-04-06 20:59:18,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:18,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:18,037 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:18,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-04-06 20:59:18,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:59:18,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:18,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:59:18,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18227 backedges. 403 proven. 2 refuted. 0 times theorem prover too weak. 17822 trivial. 0 not checked. [2022-04-06 20:59:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18227 backedges. 403 proven. 2 refuted. 0 times theorem prover too weak. 17822 trivial. 0 not checked. [2022-04-06 20:59:18,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252456997] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:18,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:18,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 4, 7] total 144 [2022-04-06 20:59:18,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:18,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [524913912] [2022-04-06 20:59:18,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [524913912] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:18,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:18,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-04-06 20:59:18,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404514680] [2022-04-06 20:59:18,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:18,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-04-06 20:59:18,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:18,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-04-06 20:59:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9739, Invalid=10853, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 20:59:18,635 INFO L87 Difference]: Start difference. First operand 286 states and 289 transitions. Second operand has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:23,166 INFO L93 Difference]: Finished difference Result 302 states and 309 transitions. [2022-04-06 20:59:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-04-06 20:59:23,167 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-04-06 20:59:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:23,167 INFO L225 Difference]: With dead ends: 302 [2022-04-06 20:59:23,167 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 20:59:23,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 841 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9450 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=28633, Invalid=48373, Unknown=0, NotChecked=0, Total=77006 [2022-04-06 20:59:23,171 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:23,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 47 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:23,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 20:59:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-04-06 20:59:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.0141342756183747) internal successors, (287), 283 states have internal predecessors, (287), 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 20:59:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2022-04-06 20:59:23,178 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 285 [2022-04-06 20:59:23,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:23,180 INFO L478 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2022-04-06 20:59:23,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0437956204379564) internal successors, (280), 136 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:23,180 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2022-04-06 20:59:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-04-06 20:59:23,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:23,181 INFO L499 BasicCegarLoop]: trace histogram [136, 134, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:23,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:23,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-04-06 20:59:23,395 INFO L403 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1300257080, now seen corresponding path program 265 times [2022-04-06 20:59:23,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:23,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612771831] [2022-04-06 20:59:23,396 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:23,396 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1300257080, now seen corresponding path program 266 times [2022-04-06 20:59:23,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:23,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150631799] [2022-04-06 20:59:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:23,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 405 proven. 18090 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:26,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:26,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150631799] [2022-04-06 20:59:26,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150631799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:26,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519878807] [2022-04-06 20:59:26,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:26,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:26,687 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:26,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-04-06 20:59:26,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:26,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 136 conjunts are in the unsatisfiable core [2022-04-06 20:59:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 405 proven. 18090 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18498 backedges. 405 proven. 18090 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519878807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:36,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:36,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 137, 137] total 274 [2022-04-06 20:59:36,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612771831] [2022-04-06 20:59:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612771831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:36,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:36,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-04-06 20:59:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691487384] [2022-04-06 20:59:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:36,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-04-06 20:59:36,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:36,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-04-06 20:59:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37130, Invalid=37672, Unknown=0, NotChecked=0, Total=74802 [2022-04-06 20:59:36,651 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:40,913 INFO L93 Difference]: Finished difference Result 304 states and 311 transitions. [2022-04-06 20:59:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-04-06 20:59:40,913 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-04-06 20:59:40,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:40,914 INFO L225 Difference]: With dead ends: 304 [2022-04-06 20:59:40,914 INFO L226 Difference]: Without dead ends: 290 [2022-04-06 20:59:40,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 847 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9848 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=73986, Invalid=92886, Unknown=0, NotChecked=0, Total=166872 [2022-04-06 20:59:40,921 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 146 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:40,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 52 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:59:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-04-06 20:59:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-04-06 20:59:40,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0140350877192983) internal successors, (289), 285 states have internal predecessors, (289), 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 20:59:40,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 293 transitions. [2022-04-06 20:59:40,930 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 293 transitions. Word has length 287 [2022-04-06 20:59:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:40,931 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 293 transitions. [2022-04-06 20:59:40,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 293 transitions. [2022-04-06 20:59:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-04-06 20:59:40,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:40,932 INFO L499 BasicCegarLoop]: trace histogram [137, 135, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:40,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-04-06 20:59:41,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-04-06 20:59:41,148 INFO L403 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1456498715, now seen corresponding path program 267 times [2022-04-06 20:59:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:41,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164888498] [2022-04-06 20:59:41,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:41,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:41,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1456498715, now seen corresponding path program 268 times [2022-04-06 20:59:41,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:41,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562756771] [2022-04-06 20:59:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18771 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562756771] [2022-04-06 20:59:44,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562756771] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:44,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289617123] [2022-04-06 20:59:44,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:44,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:44,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:44,445 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:44,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-04-06 20:59:44,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:44,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:44,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 20:59:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 18771 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:44,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18771 backedges. 408 proven. 18360 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 20:59:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289617123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:54,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:54,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 138, 138] total 276 [2022-04-06 20:59:54,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164888498] [2022-04-06 20:59:54,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164888498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:54,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:54,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-04-06 20:59:54,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853167560] [2022-04-06 20:59:54,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:54,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-04-06 20:59:54,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-04-06 20:59:54,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37677, Invalid=38223, Unknown=0, NotChecked=0, Total=75900 [2022-04-06 20:59:54,746 INFO L87 Difference]: Start difference. First operand 290 states and 293 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:58,938 INFO L93 Difference]: Finished difference Result 306 states and 313 transitions. [2022-04-06 20:59:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-06 20:59:58,939 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-04-06 20:59:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:58,939 INFO L225 Difference]: With dead ends: 306 [2022-04-06 20:59:58,939 INFO L226 Difference]: Without dead ends: 292 [2022-04-06 20:59:58,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 443 SyntacticMatches, 0 SemanticMatches, 410 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9989 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=75078, Invalid=94254, Unknown=0, NotChecked=0, Total=169332 [2022-04-06 20:59:58,945 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:58,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 42 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:59:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-04-06 20:59:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-04-06 20:59:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0139372822299653) internal successors, (291), 287 states have internal predecessors, (291), 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 20:59:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2022-04-06 20:59:58,953 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 289 [2022-04-06 20:59:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:58,953 INFO L478 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2022-04-06 20:59:58,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 138 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:59:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2022-04-06 20:59:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-04-06 20:59:58,954 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:58,954 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:58,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:59,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:59,170 INFO L403 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1280854590, now seen corresponding path program 269 times [2022-04-06 20:59:59,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:59,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182389944] [2022-04-06 20:59:59,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:59,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:59,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1280854590, now seen corresponding path program 270 times [2022-04-06 20:59:59,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:59,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882567176] [2022-04-06 20:59:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:59,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat