/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:31:37,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:31:37,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:31:37,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:31:37,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:31:37,474 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:31:37,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:31:37,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:31:37,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:31:37,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:31:37,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:31:37,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:31:37,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:31:37,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:31:37,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:31:37,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:31:37,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:31:37,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:31:37,478 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:31:37,479 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:31:37,479 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:31:37,479 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:31:37,479 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:31:37,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:31:37,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:31:37,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:31:37,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:31:37,751 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:31:37,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-18 00:31:37,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f491c6c/3ea9fbd6811a498ea9fb51745ad42e07/FLAG69b35bb3c [2022-03-18 00:31:38,155 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:31:38,156 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-18 00:31:38,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f491c6c/3ea9fbd6811a498ea9fb51745ad42e07/FLAG69b35bb3c [2022-03-18 00:31:38,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64f491c6c/3ea9fbd6811a498ea9fb51745ad42e07 [2022-03-18 00:31:38,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:31:38,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:31:38,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:31:38,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:31:38,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:31:38,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a9e607d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38, skipping insertion in model container [2022-03-18 00:31:38,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:31:38,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:31:38,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-18 00:31:38,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:31:38,891 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:31:38,927 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i[891,904] [2022-03-18 00:31:38,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:31:38,942 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:31:38,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38 WrapperNode [2022-03-18 00:31:38,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:31:38,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:31:38,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:31:38,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:31:38,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:31:38,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:31:38,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:31:38,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:31:38,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (1/1) ... [2022-03-18 00:31:38,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:31:38,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:39,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:31:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:31:39,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:31:39,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:31:39,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:31:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 00:31:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:31:39,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:31:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:31:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:31:39,161 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:31:39,162 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:31:39,247 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:31:39,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:31:39,251 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 00:31:39,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:31:39 BoogieIcfgContainer [2022-03-18 00:31:39,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:31:39,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:31:39,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:31:39,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:31:39,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:31:38" (1/3) ... [2022-03-18 00:31:39,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491e23d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:31:39, skipping insertion in model container [2022-03-18 00:31:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:31:38" (2/3) ... [2022-03-18 00:31:39,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491e23d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:31:39, skipping insertion in model container [2022-03-18 00:31:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:31:39" (3/3) ... [2022-03-18 00:31:39,258 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2022-03-18 00:31:39,261 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:31:39,261 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:31:39,289 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:31:39,294 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:31:39,294 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:31:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:31:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 00:31:39,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:39,308 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:39,309 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2089905556, now seen corresponding path program 1 times [2022-03-18 00:31:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:39,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161939059] [2022-03-18 00:31:39,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:31:39,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2089905556, now seen corresponding path program 2 times [2022-03-18 00:31:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451832276] [2022-03-18 00:31:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:39,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:39,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:39,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:39,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451832276] [2022-03-18 00:31:39,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451832276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:39,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:39,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:31:39,515 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:39,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161939059] [2022-03-18 00:31:39,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161939059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:39,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:39,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 00:31:39,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638036802] [2022-03-18 00:31:39,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:39,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 00:31:39,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 00:31:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 00:31:39,538 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 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) [2022-03-18 00:31:39,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:39,587 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-03-18 00:31:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 00:31:39,589 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 [2022-03-18 00:31:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:39,593 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:31:39,593 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 00:31:39,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 00:31:39,600 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:39,600 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 00:31:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-18 00:31:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-03-18 00:31:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-18 00:31:39,625 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-18 00:31:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:39,625 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-18 00:31:39,625 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) [2022-03-18 00:31:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-18 00:31:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 00:31:39,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:39,626 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:39,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:31:39,627 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:39,628 INFO L85 PathProgramCache]: Analyzing trace with hash -545306800, now seen corresponding path program 1 times [2022-03-18 00:31:39,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:39,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350916522] [2022-03-18 00:31:40,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:40,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash -545306800, now seen corresponding path program 2 times [2022-03-18 00:31:40,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:40,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262795919] [2022-03-18 00:31:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:40,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:40,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:40,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262795919] [2022-03-18 00:31:40,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262795919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:40,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426530520] [2022-03-18 00:31:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:40,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:40,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:40,216 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) [2022-03-18 00:31:40,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:31:40,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 00:31:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:40,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:40,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426530520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:40,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:40,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-18 00:31:40,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:40,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350916522] [2022-03-18 00:31:40,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350916522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:40,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:40,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 00:31:40,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498113153] [2022-03-18 00:31:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:40,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 00:31:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:40,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 00:31:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 00:31:40,432 INFO L87 Difference]: Start difference. First operand 14 states and 14 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) [2022-03-18 00:31:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:40,487 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-18 00:31:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 00:31:40,488 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 [2022-03-18 00:31:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:40,488 INFO L225 Difference]: With dead ends: 21 [2022-03-18 00:31:40,488 INFO L226 Difference]: Without dead ends: 16 [2022-03-18 00:31:40,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-18 00:31:40,490 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 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 [2022-03-18 00:31:40,490 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-18 00:31:40,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-18 00:31:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-03-18 00:31:40,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-18 00:31:40,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-03-18 00:31:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:40,495 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-18 00:31:40,495 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) [2022-03-18 00:31:40,495 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-18 00:31:40,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 00:31:40,495 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:40,495 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:40,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:40,696 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 [2022-03-18 00:31:40,696 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1046323724, now seen corresponding path program 3 times [2022-03-18 00:31:40,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:40,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048294038] [2022-03-18 00:31:41,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:41,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1046323724, now seen corresponding path program 4 times [2022-03-18 00:31:41,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801966105] [2022-03-18 00:31:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:41,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801966105] [2022-03-18 00:31:41,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801966105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945927623] [2022-03-18 00:31:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:41,233 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) [2022-03-18 00:31:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:31:41,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:31:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:41,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:41,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945927623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:41,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:41,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-18 00:31:41,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048294038] [2022-03-18 00:31:41,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048294038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:41,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:41,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:31:41,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452089045] [2022-03-18 00:31:41,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:41,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:31:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:41,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:31:41,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 00:31:41,418 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:41,493 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-18 00:31:41,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:31:41,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 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 [2022-03-18 00:31:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:41,494 INFO L225 Difference]: With dead ends: 24 [2022-03-18 00:31:41,494 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 00:31:41,495 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-18 00:31:41,504 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:41,505 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 38 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 00:31:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-18 00:31:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2022-03-18 00:31:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-18 00:31:41,511 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-03-18 00:31:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:41,511 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-18 00:31:41,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-18 00:31:41,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 00:31:41,512 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:41,512 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:41,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:41,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 00:31:41,730 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1594899912, now seen corresponding path program 5 times [2022-03-18 00:31:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515452904] [2022-03-18 00:31:42,178 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:42,178 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1594899912, now seen corresponding path program 6 times [2022-03-18 00:31:42,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:42,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042414235] [2022-03-18 00:31:42,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:42,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:42,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:42,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042414235] [2022-03-18 00:31:42,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042414235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:42,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311942277] [2022-03-18 00:31:42,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:42,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:42,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:42,276 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) [2022-03-18 00:31:42,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:31:42,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 00:31:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 00:31:42,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:42,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311942277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:42,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:42,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-18 00:31:42,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515452904] [2022-03-18 00:31:42,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515452904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:42,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:42,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 00:31:42,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113710039] [2022-03-18 00:31:42,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:42,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 00:31:42,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:42,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 00:31:42,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-18 00:31:42,443 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:42,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:42,524 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-18 00:31:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 00:31:42,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 00:31:42,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:42,525 INFO L225 Difference]: With dead ends: 26 [2022-03-18 00:31:42,525 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 00:31:42,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:31:42,526 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:42,526 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 00:31:42,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-18 00:31:42,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-18 00:31:42,529 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2022-03-18 00:31:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:42,529 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-18 00:31:42,530 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-18 00:31:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 00:31:42,530 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:42,530 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:42,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:42,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:42,747 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:42,747 INFO L85 PathProgramCache]: Analyzing trace with hash 495639172, now seen corresponding path program 7 times [2022-03-18 00:31:42,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:42,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323073314] [2022-03-18 00:31:45,533 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:45,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:45,534 INFO L85 PathProgramCache]: Analyzing trace with hash 495639172, now seen corresponding path program 8 times [2022-03-18 00:31:45,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:45,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823716374] [2022-03-18 00:31:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:45,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:45,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:45,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823716374] [2022-03-18 00:31:45,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823716374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565535625] [2022-03-18 00:31:45,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:45,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:45,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:45,645 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) [2022-03-18 00:31:45,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:31:45,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:45,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:45,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:31:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:45,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:45,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565535625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:45,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:45,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 00:31:45,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:45,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323073314] [2022-03-18 00:31:45,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323073314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:45,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:45,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:31:45,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115448812] [2022-03-18 00:31:45,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:45,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:31:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:31:45,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:31:45,855 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:45,944 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-18 00:31:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:31:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 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 [2022-03-18 00:31:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:45,946 INFO L225 Difference]: With dead ends: 28 [2022-03-18 00:31:45,946 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 00:31:45,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-03-18 00:31:45,948 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:45,948 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 00:31:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-18 00:31:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2022-03-18 00:31:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-18 00:31:45,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2022-03-18 00:31:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:45,958 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-18 00:31:45,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-18 00:31:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 00:31:45,959 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:45,959 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:45,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:46,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:46,166 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:46,166 INFO L85 PathProgramCache]: Analyzing trace with hash 668022848, now seen corresponding path program 9 times [2022-03-18 00:31:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:46,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201463336] [2022-03-18 00:31:46,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:46,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:46,552 INFO L85 PathProgramCache]: Analyzing trace with hash 668022848, now seen corresponding path program 10 times [2022-03-18 00:31:46,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:46,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928556089] [2022-03-18 00:31:46,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:46,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:46,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928556089] [2022-03-18 00:31:46,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928556089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913669981] [2022-03-18 00:31:46,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:46,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:46,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:46,628 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) [2022-03-18 00:31:46,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:31:46,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:46,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:46,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 00:31:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:46,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:46,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913669981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:46,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:46,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-18 00:31:46,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201463336] [2022-03-18 00:31:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201463336] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:46,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:46,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 00:31:46,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123229253] [2022-03-18 00:31:46,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:46,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 00:31:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 00:31:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-18 00:31:46,848 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:46,930 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-18 00:31:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:31:46,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 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 21 [2022-03-18 00:31:46,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:46,931 INFO L225 Difference]: With dead ends: 30 [2022-03-18 00:31:46,931 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 00:31:46,932 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:31:46,932 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:46,932 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:46,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 00:31:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-18 00:31:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 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) [2022-03-18 00:31:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-18 00:31:46,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2022-03-18 00:31:46,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:46,936 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-18 00:31:46,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-18 00:31:46,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 00:31:46,936 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:46,936 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:46,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:47,162 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:47,162 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1174989060, now seen corresponding path program 11 times [2022-03-18 00:31:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1661455891] [2022-03-18 00:31:47,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:47,761 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:47,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1174989060, now seen corresponding path program 12 times [2022-03-18 00:31:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:47,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266832943] [2022-03-18 00:31:47,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:47,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:47,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:47,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:47,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266832943] [2022-03-18 00:31:47,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266832943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:47,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146821731] [2022-03-18 00:31:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:47,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:47,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:47,920 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) [2022-03-18 00:31:47,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:31:47,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 00:31:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:47,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 00:31:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:48,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146821731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:48,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:48,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 00:31:48,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:48,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1661455891] [2022-03-18 00:31:48,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1661455891] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:48,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:48,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:31:48,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288218189] [2022-03-18 00:31:48,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:48,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:31:48,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:48,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:31:48,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:31:48,164 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:48,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:48,257 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-18 00:31:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:31:48,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 00:31:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:48,258 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:31:48,258 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 00:31:48,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2022-03-18 00:31:48,259 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:48,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 00:31:48,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 00:31:48,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 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) [2022-03-18 00:31:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-03-18 00:31:48,262 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-03-18 00:31:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:48,262 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-03-18 00:31:48,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-03-18 00:31:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-18 00:31:48,263 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:48,263 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:48,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:48,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:48,468 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1512060600, now seen corresponding path program 13 times [2022-03-18 00:31:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2055615306] [2022-03-18 00:31:49,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:49,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1512060600, now seen corresponding path program 14 times [2022-03-18 00:31:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528936183] [2022-03-18 00:31:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:49,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:49,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528936183] [2022-03-18 00:31:49,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528936183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:49,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963679986] [2022-03-18 00:31:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:49,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:49,211 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) [2022-03-18 00:31:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:31:49,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:49,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 00:31:49,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:49,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:49,452 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:49,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963679986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:49,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:49,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-18 00:31:49,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2055615306] [2022-03-18 00:31:49,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2055615306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:49,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:49,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 00:31:49,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243324131] [2022-03-18 00:31:49,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:49,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 00:31:49,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:49,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 00:31:49,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:31:49,454 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:49,555 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-18 00:31:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:31:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 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 [2022-03-18 00:31:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:49,556 INFO L225 Difference]: With dead ends: 34 [2022-03-18 00:31:49,556 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 00:31:49,557 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:31:49,557 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:49,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 43 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 00:31:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-18 00:31:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-18 00:31:49,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-03-18 00:31:49,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:49,561 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-18 00:31:49,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-18 00:31:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 00:31:49,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:49,561 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:49,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 00:31:49,780 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:49,781 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:49,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1803528332, now seen corresponding path program 15 times [2022-03-18 00:31:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [255865538] [2022-03-18 00:31:54,023 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:54,023 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1803528332, now seen corresponding path program 16 times [2022-03-18 00:31:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:54,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619953974] [2022-03-18 00:31:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:54,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619953974] [2022-03-18 00:31:54,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619953974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202538844] [2022-03-18 00:31:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:54,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:54,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:54,177 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) [2022-03-18 00:31:54,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:31:54,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:54,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:31:54,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:54,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:54,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202538844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:54,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:54,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-18 00:31:54,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:54,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [255865538] [2022-03-18 00:31:54,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [255865538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:54,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:54,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:31:54,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496145181] [2022-03-18 00:31:54,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:54,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:31:54,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:31:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-03-18 00:31:54,466 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:54,628 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-18 00:31:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:31:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 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 [2022-03-18 00:31:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:54,629 INFO L225 Difference]: With dead ends: 36 [2022-03-18 00:31:54,629 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 00:31:54,630 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=422, Invalid=910, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:31:54,630 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:54,630 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:31:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 00:31:54,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-18 00:31:54,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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) [2022-03-18 00:31:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-18 00:31:54,636 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-03-18 00:31:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:54,636 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-18 00:31:54,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-18 00:31:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 00:31:54,637 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:54,637 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:54,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:54,858 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,SelfDestructingSolverStorable8 [2022-03-18 00:31:54,858 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1218758352, now seen corresponding path program 17 times [2022-03-18 00:31:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:54,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [926978922] [2022-03-18 00:31:55,226 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:55,226 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1218758352, now seen corresponding path program 18 times [2022-03-18 00:31:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653298415] [2022-03-18 00:31:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:55,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:55,334 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653298415] [2022-03-18 00:31:55,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653298415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:55,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73626298] [2022-03-18 00:31:55,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:55,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:55,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:55,336 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) [2022-03-18 00:31:55,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:31:55,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 00:31:55,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:55,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 00:31:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:55,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:55,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73626298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:55,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:55,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-18 00:31:55,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:55,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [926978922] [2022-03-18 00:31:55,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [926978922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:55,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:55,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 00:31:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685417146] [2022-03-18 00:31:55,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:55,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 00:31:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 00:31:55,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:31:55,610 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:55,765 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-18 00:31:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:31:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 00:31:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:55,766 INFO L225 Difference]: With dead ends: 38 [2022-03-18 00:31:55,766 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 00:31:55,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=506, Invalid=1054, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:31:55,768 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:55,768 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:31:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 00:31:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-18 00:31:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2022-03-18 00:31:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-18 00:31:55,773 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2022-03-18 00:31:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:55,773 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-18 00:31:55,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:55,773 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-18 00:31:55,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 00:31:55,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:55,774 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:55,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:55,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 00:31:55,977 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:55,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1895523348, now seen corresponding path program 19 times [2022-03-18 00:31:55,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:55,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1556319526] [2022-03-18 00:31:56,864 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:56,864 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:56,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1895523348, now seen corresponding path program 20 times [2022-03-18 00:31:56,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:56,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217797446] [2022-03-18 00:31:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:56,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:56,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:56,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217797446] [2022-03-18 00:31:56,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217797446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:56,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488365450] [2022-03-18 00:31:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:31:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:56,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:56,991 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) [2022-03-18 00:31:56,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:31:57,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:31:57,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 00:31:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:57,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:57,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488365450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:57,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:57,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-18 00:31:57,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1556319526] [2022-03-18 00:31:57,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1556319526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:57,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:57,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:31:57,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2980353] [2022-03-18 00:31:57,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:57,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:31:57,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:31:57,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:31:57,346 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:57,490 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-18 00:31:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:31:57,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 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 [2022-03-18 00:31:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:57,490 INFO L225 Difference]: With dead ends: 40 [2022-03-18 00:31:57,490 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 00:31:57,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=598, Invalid=1208, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 00:31:57,516 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:57,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:31:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 00:31:57,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-18 00:31:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-03-18 00:31:57,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2022-03-18 00:31:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:57,526 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-03-18 00:31:57,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-03-18 00:31:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 00:31:57,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:57,527 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:57,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:57,742 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,SelfDestructingSolverStorable10 [2022-03-18 00:31:57,743 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash 568344488, now seen corresponding path program 21 times [2022-03-18 00:31:57,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:57,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987795367] [2022-03-18 00:31:58,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:58,046 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 568344488, now seen corresponding path program 22 times [2022-03-18 00:31:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:58,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470150905] [2022-03-18 00:31:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:58,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470150905] [2022-03-18 00:31:58,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470150905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:58,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105858616] [2022-03-18 00:31:58,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:31:58,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:58,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:58,158 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) [2022-03-18 00:31:58,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:31:58,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:31:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:58,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:31:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:58,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:58,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105858616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:58,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:58,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-18 00:31:58,421 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:58,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987795367] [2022-03-18 00:31:58,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987795367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:58,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:58,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 00:31:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466350966] [2022-03-18 00:31:58,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:58,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 00:31:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 00:31:58,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:31:58,422 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:31:58,597 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-18 00:31:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:31:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 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 [2022-03-18 00:31:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:31:58,598 INFO L225 Difference]: With dead ends: 42 [2022-03-18 00:31:58,598 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 00:31:58,599 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=698, Invalid=1372, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:31:58,599 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:31:58,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:31:58,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 00:31:58,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-18 00:31:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 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) [2022-03-18 00:31:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-03-18 00:31:58,603 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2022-03-18 00:31:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:31:58,603 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-03-18 00:31:58,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:31:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-03-18 00:31:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 00:31:58,604 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:31:58,604 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:31:58,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:31:58,804 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,SelfDestructingSolverStorable11 [2022-03-18 00:31:58,804 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:31:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:31:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1818354788, now seen corresponding path program 23 times [2022-03-18 00:31:58,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:58,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2123195718] [2022-03-18 00:31:59,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:31:59,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:31:59,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1818354788, now seen corresponding path program 24 times [2022-03-18 00:31:59,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:31:59,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396027119] [2022-03-18 00:31:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:31:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:31:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:59,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:31:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:31:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:31:59,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396027119] [2022-03-18 00:31:59,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396027119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:31:59,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855418004] [2022-03-18 00:31:59,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:31:59,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:31:59,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:31:59,436 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) [2022-03-18 00:31:59,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:31:59,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 00:31:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:31:59,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:31:59,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:31:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:59,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:31:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:31:59,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855418004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:31:59,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:31:59,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-18 00:31:59,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:31:59,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2123195718] [2022-03-18 00:31:59,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2123195718] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:31:59,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:31:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:31:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781553933] [2022-03-18 00:31:59,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:31:59,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:31:59,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:31:59,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:31:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:31:59,830 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:00,002 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-18 00:32:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:32:00,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-18 00:32:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:00,003 INFO L225 Difference]: With dead ends: 44 [2022-03-18 00:32:00,003 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 00:32:00,004 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=1546, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 00:32:00,004 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:00,005 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 00:32:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-18 00:32:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 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) [2022-03-18 00:32:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-03-18 00:32:00,008 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2022-03-18 00:32:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:00,009 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-03-18 00:32:00,009 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-03-18 00:32:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 00:32:00,009 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:00,009 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:00,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:00,222 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,SelfDestructingSolverStorable12 [2022-03-18 00:32:00,222 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash 487410208, now seen corresponding path program 25 times [2022-03-18 00:32:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:00,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1887697726] [2022-03-18 00:32:00,570 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:00,571 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:00,571 INFO L85 PathProgramCache]: Analyzing trace with hash 487410208, now seen corresponding path program 26 times [2022-03-18 00:32:00,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:00,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963818629] [2022-03-18 00:32:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:00,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:00,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:00,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963818629] [2022-03-18 00:32:00,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963818629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546475784] [2022-03-18 00:32:00,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:00,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:00,732 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) [2022-03-18 00:32:00,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:32:00,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 00:32:00,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:00,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546475784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:01,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:01,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 00:32:01,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1887697726] [2022-03-18 00:32:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1887697726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:01,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:01,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 00:32:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806108288] [2022-03-18 00:32:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:01,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 00:32:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 00:32:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:32:01,129 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:01,322 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-18 00:32:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:32:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 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 [2022-03-18 00:32:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:01,323 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:32:01,323 INFO L226 Difference]: Without dead ends: 41 [2022-03-18 00:32:01,324 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=922, Invalid=1730, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:32:01,324 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 38 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:01,325 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 43 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-18 00:32:01,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-18 00:32:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-18 00:32:01,330 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2022-03-18 00:32:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:01,330 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-18 00:32:01,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-18 00:32:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 00:32:01,330 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:01,330 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:01,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 00:32:01,539 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,SelfDestructingSolverStorable13 [2022-03-18 00:32:01,539 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:01,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1349923036, now seen corresponding path program 27 times [2022-03-18 00:32:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:01,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264141805] [2022-03-18 00:32:01,920 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:01,920 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:01,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1349923036, now seen corresponding path program 28 times [2022-03-18 00:32:01,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107449855] [2022-03-18 00:32:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:01,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:02,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:02,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107449855] [2022-03-18 00:32:02,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107449855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385328558] [2022-03-18 00:32:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:02,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:02,064 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) [2022-03-18 00:32:02,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:32:02,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:02,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:02,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:32:02,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:02,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:02,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385328558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:02,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:02,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-18 00:32:02,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264141805] [2022-03-18 00:32:02,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264141805] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:02,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:02,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:32:02,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15729654] [2022-03-18 00:32:02,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:02,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:32:02,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:32:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 00:32:02,573 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:02,804 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-18 00:32:02,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:32:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 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 [2022-03-18 00:32:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:02,804 INFO L225 Difference]: With dead ends: 48 [2022-03-18 00:32:02,805 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 00:32:02,805 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1046, Invalid=1924, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 00:32:02,806 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:02,806 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 00:32:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-18 00:32:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 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) [2022-03-18 00:32:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-03-18 00:32:02,810 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2022-03-18 00:32:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:02,810 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-03-18 00:32:02,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-03-18 00:32:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 00:32:02,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:02,811 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:02,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:03,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:03,011 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1296062616, now seen corresponding path program 29 times [2022-03-18 00:32:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407500076] [2022-03-18 00:32:03,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:03,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:03,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1296062616, now seen corresponding path program 30 times [2022-03-18 00:32:03,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:03,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220677205] [2022-03-18 00:32:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:03,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:03,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:03,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:03,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220677205] [2022-03-18 00:32:03,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220677205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631749640] [2022-03-18 00:32:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:03,401 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) [2022-03-18 00:32:03,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:32:03,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-18 00:32:03,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 00:32:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:03,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:03,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631749640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:03,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:03,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-18 00:32:03,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:03,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407500076] [2022-03-18 00:32:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407500076] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:03,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 00:32:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343016585] [2022-03-18 00:32:03,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:03,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 00:32:03,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:03,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 00:32:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:32:03,911 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:04,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:04,114 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-18 00:32:04,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:32:04,114 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-18 00:32:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:04,115 INFO L225 Difference]: With dead ends: 50 [2022-03-18 00:32:04,115 INFO L226 Difference]: Without dead ends: 45 [2022-03-18 00:32:04,116 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1178, Invalid=2128, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:32:04,116 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:04,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-18 00:32:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-18 00:32:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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) [2022-03-18 00:32:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-03-18 00:32:04,126 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2022-03-18 00:32:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:04,126 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-03-18 00:32:04,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-03-18 00:32:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 00:32:04,127 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:04,127 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:04,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:04,331 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,SelfDestructingSolverStorable15 [2022-03-18 00:32:04,331 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:04,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:04,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1075806548, now seen corresponding path program 31 times [2022-03-18 00:32:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:04,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462765536] [2022-03-18 00:32:04,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:04,725 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1075806548, now seen corresponding path program 32 times [2022-03-18 00:32:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504714073] [2022-03-18 00:32:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:04,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504714073] [2022-03-18 00:32:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504714073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:04,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75484408] [2022-03-18 00:32:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:04,854 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) [2022-03-18 00:32:04,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:32:04,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 00:32:04,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:05,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75484408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:05,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:05,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-18 00:32:05,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:05,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462765536] [2022-03-18 00:32:05,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462765536] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:05,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:05,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:32:05,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733338130] [2022-03-18 00:32:05,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:05,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:32:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:32:05,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:32:05,339 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:05,532 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-18 00:32:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:32:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 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 [2022-03-18 00:32:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:05,533 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:32:05,533 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 00:32:05,535 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1318, Invalid=2342, Unknown=0, NotChecked=0, Total=3660 [2022-03-18 00:32:05,535 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:05,535 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 00:32:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-18 00:32:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-03-18 00:32:05,543 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2022-03-18 00:32:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:05,543 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-03-18 00:32:05,543 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-03-18 00:32:05,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 00:32:05,544 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:05,545 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:05,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:05,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 00:32:05,757 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:05,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -136877296, now seen corresponding path program 33 times [2022-03-18 00:32:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:05,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1341394122] [2022-03-18 00:32:06,255 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:06,255 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash -136877296, now seen corresponding path program 34 times [2022-03-18 00:32:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:06,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519335446] [2022-03-18 00:32:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:06,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:06,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:06,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:06,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519335446] [2022-03-18 00:32:06,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519335446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:06,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311674206] [2022-03-18 00:32:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:06,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:06,448 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) [2022-03-18 00:32:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:32:06,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:06,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:06,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 00:32:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:06,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311674206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:06,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:06,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-18 00:32:06,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1341394122] [2022-03-18 00:32:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1341394122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:06,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:06,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 00:32:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209967259] [2022-03-18 00:32:06,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:06,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 00:32:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:06,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 00:32:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1139, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:32:06,987 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:07,194 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-18 00:32:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:32:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 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 [2022-03-18 00:32:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:07,195 INFO L225 Difference]: With dead ends: 54 [2022-03-18 00:32:07,195 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 00:32:07,196 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1466, Invalid=2566, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:32:07,197 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:07,197 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 53 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 00:32:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-18 00:32:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 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) [2022-03-18 00:32:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-03-18 00:32:07,204 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2022-03-18 00:32:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:07,204 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-03-18 00:32:07,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:07,205 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-03-18 00:32:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-18 00:32:07,206 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:07,206 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:07,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:07,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:32:07,448 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:07,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1589914164, now seen corresponding path program 35 times [2022-03-18 00:32:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114175585] [2022-03-18 00:32:08,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:08,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1589914164, now seen corresponding path program 36 times [2022-03-18 00:32:08,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:08,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521183616] [2022-03-18 00:32:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:08,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:08,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:08,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:08,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521183616] [2022-03-18 00:32:08,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521183616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141159977] [2022-03-18 00:32:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:08,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:08,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:08,364 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) [2022-03-18 00:32:08,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:32:08,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 00:32:08,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:32:08,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:08,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:09,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141159977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:09,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:09,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-18 00:32:09,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:09,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114175585] [2022-03-18 00:32:09,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114175585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:09,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:09,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:32:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443224554] [2022-03-18 00:32:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:09,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:32:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:32:09,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1238, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:32:09,004 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:09,304 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-18 00:32:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:32:09,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-18 00:32:09,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:09,304 INFO L225 Difference]: With dead ends: 56 [2022-03-18 00:32:09,304 INFO L226 Difference]: Without dead ends: 51 [2022-03-18 00:32:09,305 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1622, Invalid=2800, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:32:09,306 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:09,306 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 28 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-18 00:32:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-18 00:32:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 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) [2022-03-18 00:32:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-03-18 00:32:09,310 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2022-03-18 00:32:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:09,310 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-03-18 00:32:09,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-03-18 00:32:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 00:32:09,311 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:09,311 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:09,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:09,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:09,528 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2093973112, now seen corresponding path program 37 times [2022-03-18 00:32:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033084358] [2022-03-18 00:32:13,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:13,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2093973112, now seen corresponding path program 38 times [2022-03-18 00:32:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:13,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793516745] [2022-03-18 00:32:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:13,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:13,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:13,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793516745] [2022-03-18 00:32:13,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793516745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189991270] [2022-03-18 00:32:13,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:13,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:13,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:13,698 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) [2022-03-18 00:32:13,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:32:13,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:13,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 00:32:13,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:13,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189991270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:14,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:14,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-18 00:32:14,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033084358] [2022-03-18 00:32:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033084358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:14,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:14,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 00:32:14,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437919131] [2022-03-18 00:32:14,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:14,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 00:32:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 00:32:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:32:14,371 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:14,716 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-18 00:32:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:32:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 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 [2022-03-18 00:32:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:14,717 INFO L225 Difference]: With dead ends: 58 [2022-03-18 00:32:14,717 INFO L226 Difference]: Without dead ends: 53 [2022-03-18 00:32:14,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1786, Invalid=3044, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:32:14,718 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:14,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 53 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-18 00:32:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-18 00:32:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-03-18 00:32:14,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2022-03-18 00:32:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:14,723 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-03-18 00:32:14,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-03-18 00:32:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 00:32:14,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:14,723 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:14,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:14,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:14,924 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1163317692, now seen corresponding path program 39 times [2022-03-18 00:32:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846187355] [2022-03-18 00:32:15,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:15,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1163317692, now seen corresponding path program 40 times [2022-03-18 00:32:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296371833] [2022-03-18 00:32:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:15,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:15,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:15,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296371833] [2022-03-18 00:32:15,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296371833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:15,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467111163] [2022-03-18 00:32:15,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:15,695 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) [2022-03-18 00:32:15,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:32:15,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:32:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:15,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467111163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:16,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-18 00:32:16,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846187355] [2022-03-18 00:32:16,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846187355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:16,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:16,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:32:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174066654] [2022-03-18 00:32:16,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:16,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:32:16,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:32:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 00:32:16,432 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:16,745 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-18 00:32:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:32:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 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 [2022-03-18 00:32:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:16,746 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:32:16,746 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 00:32:16,747 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1958, Invalid=3298, Unknown=0, NotChecked=0, Total=5256 [2022-03-18 00:32:16,747 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:16,747 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 38 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 00:32:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-18 00:32:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 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) [2022-03-18 00:32:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-18 00:32:16,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2022-03-18 00:32:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:16,752 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-18 00:32:16,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-18 00:32:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 00:32:16,753 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:16,753 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:16,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:16,953 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,SelfDestructingSolverStorable20 [2022-03-18 00:32:16,953 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -156656640, now seen corresponding path program 41 times [2022-03-18 00:32:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354079714] [2022-03-18 00:32:17,408 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:17,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:17,409 INFO L85 PathProgramCache]: Analyzing trace with hash -156656640, now seen corresponding path program 42 times [2022-03-18 00:32:17,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:17,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586841675] [2022-03-18 00:32:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:17,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:17,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586841675] [2022-03-18 00:32:17,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586841675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:17,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267280816] [2022-03-18 00:32:17,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:17,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:17,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:17,650 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) [2022-03-18 00:32:17,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:32:17,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 00:32:17,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 00:32:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267280816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:18,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:18,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-18 00:32:18,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354079714] [2022-03-18 00:32:18,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354079714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:18,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:18,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 00:32:18,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655269942] [2022-03-18 00:32:18,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:18,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 00:32:18,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 00:32:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:32:18,207 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:18,433 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-18 00:32:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:32:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-18 00:32:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:18,434 INFO L225 Difference]: With dead ends: 62 [2022-03-18 00:32:18,434 INFO L226 Difference]: Without dead ends: 57 [2022-03-18 00:32:18,434 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2138, Invalid=3562, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:32:18,435 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:18,438 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:32:18,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-18 00:32:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-18 00:32:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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) [2022-03-18 00:32:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-18 00:32:18,446 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2022-03-18 00:32:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:18,448 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-18 00:32:18,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:18,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-18 00:32:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 00:32:18,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:18,449 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:18,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:18,662 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,SelfDestructingSolverStorable21 [2022-03-18 00:32:18,662 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:18,662 INFO L85 PathProgramCache]: Analyzing trace with hash 876972732, now seen corresponding path program 43 times [2022-03-18 00:32:18,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:18,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580388635] [2022-03-18 00:32:19,007 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:19,007 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash 876972732, now seen corresponding path program 44 times [2022-03-18 00:32:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:19,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061904615] [2022-03-18 00:32:19,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:19,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:19,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:19,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:19,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061904615] [2022-03-18 00:32:19,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061904615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:19,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890851149] [2022-03-18 00:32:19,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:19,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:19,292 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) [2022-03-18 00:32:19,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:32:19,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:19,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:32:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:20,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890851149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:20,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:20,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-18 00:32:20,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580388635] [2022-03-18 00:32:20,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580388635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:20,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:20,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:32:20,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036496818] [2022-03-18 00:32:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:20,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:32:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:20,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:32:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:32:20,693 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:21,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:21,058 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-18 00:32:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:32:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 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 [2022-03-18 00:32:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:21,059 INFO L225 Difference]: With dead ends: 64 [2022-03-18 00:32:21,059 INFO L226 Difference]: Without dead ends: 59 [2022-03-18 00:32:21,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2326, Invalid=3836, Unknown=0, NotChecked=0, Total=6162 [2022-03-18 00:32:21,060 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:21,060 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 43 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:21,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-18 00:32:21,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-18 00:32:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-03-18 00:32:21,065 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2022-03-18 00:32:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:21,065 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-03-18 00:32:21,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-03-18 00:32:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 00:32:21,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:21,066 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:21,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:21,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:21,282 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 2057353848, now seen corresponding path program 45 times [2022-03-18 00:32:21,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [343634682] [2022-03-18 00:32:21,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:21,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:21,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2057353848, now seen corresponding path program 46 times [2022-03-18 00:32:21,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:21,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373393291] [2022-03-18 00:32:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:21,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:22,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:22,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373393291] [2022-03-18 00:32:22,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373393291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:22,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810978706] [2022-03-18 00:32:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:22,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:22,149 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) [2022-03-18 00:32:22,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:32:22,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:22,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:22,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 00:32:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:23,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810978706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:23,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:23,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-18 00:32:23,149 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:23,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [343634682] [2022-03-18 00:32:23,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [343634682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:23,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:23,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 00:32:23,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978396637] [2022-03-18 00:32:23,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:23,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 00:32:23,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:23,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 00:32:23,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:32:23,150 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:23,551 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-18 00:32:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:32:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 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 [2022-03-18 00:32:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:23,552 INFO L225 Difference]: With dead ends: 66 [2022-03-18 00:32:23,552 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 00:32:23,553 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2522, Invalid=4120, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:32:23,553 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:23,554 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 53 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 00:32:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-18 00:32:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 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) [2022-03-18 00:32:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-03-18 00:32:23,559 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2022-03-18 00:32:23,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:23,559 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-03-18 00:32:23,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:23,559 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-03-18 00:32:23,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 00:32:23,559 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:23,559 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:23,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:23,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:23,775 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1762727116, now seen corresponding path program 47 times [2022-03-18 00:32:23,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:23,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1633877167] [2022-03-18 00:32:24,253 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:24,253 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1762727116, now seen corresponding path program 48 times [2022-03-18 00:32:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:24,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629106297] [2022-03-18 00:32:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:24,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629106297] [2022-03-18 00:32:24,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629106297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:24,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184670850] [2022-03-18 00:32:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:24,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:24,504 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) [2022-03-18 00:32:24,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:32:24,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-18 00:32:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 00:32:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:25,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184670850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:25,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-18 00:32:25,316 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1633877167] [2022-03-18 00:32:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1633877167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:25,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:32:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245212470] [2022-03-18 00:32:25,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:25,316 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:32:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:32:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=1916, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:32:25,317 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:25,633 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-18 00:32:25,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:32:25,633 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-18 00:32:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:25,634 INFO L225 Difference]: With dead ends: 68 [2022-03-18 00:32:25,634 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 00:32:25,634 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2726, Invalid=4414, Unknown=0, NotChecked=0, Total=7140 [2022-03-18 00:32:25,635 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:25,635 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 00:32:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 00:32:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 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) [2022-03-18 00:32:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-03-18 00:32:25,641 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2022-03-18 00:32:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:25,641 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-03-18 00:32:25,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-03-18 00:32:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-18 00:32:25,641 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:25,641 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:25,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:25,855 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,SelfDestructingSolverStorable24 [2022-03-18 00:32:25,855 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -663495440, now seen corresponding path program 49 times [2022-03-18 00:32:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:25,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931576056] [2022-03-18 00:32:26,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:26,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -663495440, now seen corresponding path program 50 times [2022-03-18 00:32:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:26,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965751954] [2022-03-18 00:32:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:26,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965751954] [2022-03-18 00:32:26,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965751954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009100166] [2022-03-18 00:32:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:26,339 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) [2022-03-18 00:32:26,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:32:26,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:26,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 00:32:26,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:26,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:27,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009100166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:27,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:27,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-18 00:32:27,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931576056] [2022-03-18 00:32:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931576056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:27,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 00:32:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259216320] [2022-03-18 00:32:27,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:27,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 00:32:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:27,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 00:32:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:32:27,244 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:27,666 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-18 00:32:27,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:32:27,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 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 [2022-03-18 00:32:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:27,667 INFO L225 Difference]: With dead ends: 70 [2022-03-18 00:32:27,667 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 00:32:27,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2938, Invalid=4718, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:32:27,675 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:27,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 38 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:27,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 00:32:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-03-18 00:32:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-18 00:32:27,682 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2022-03-18 00:32:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:27,683 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-18 00:32:27,683 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-18 00:32:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 00:32:27,683 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:27,683 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:27,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:27,895 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,SelfDestructingSolverStorable25 [2022-03-18 00:32:27,896 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -863809620, now seen corresponding path program 51 times [2022-03-18 00:32:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:27,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760679807] [2022-03-18 00:32:28,328 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:28,328 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:28,328 INFO L85 PathProgramCache]: Analyzing trace with hash -863809620, now seen corresponding path program 52 times [2022-03-18 00:32:28,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:28,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139373225] [2022-03-18 00:32:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:28,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:28,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139373225] [2022-03-18 00:32:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139373225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167960266] [2022-03-18 00:32:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:28,661 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) [2022-03-18 00:32:28,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:32:28,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:32:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:28,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:29,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167960266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:29,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:29,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-18 00:32:29,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:29,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760679807] [2022-03-18 00:32:29,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760679807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:29,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:29,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:32:29,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137907750] [2022-03-18 00:32:29,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:29,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:32:29,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:29,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:32:29,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:32:29,633 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:30,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:30,098 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-18 00:32:30,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:32:30,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 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 [2022-03-18 00:32:30,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:30,098 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:32:30,098 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 00:32:30,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3158, Invalid=5032, Unknown=0, NotChecked=0, Total=8190 [2022-03-18 00:32:30,099 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:30,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 00:32:30,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-18 00:32:30,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 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) [2022-03-18 00:32:30,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-03-18 00:32:30,106 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2022-03-18 00:32:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:30,106 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-03-18 00:32:30,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-03-18 00:32:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 00:32:30,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:30,107 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:30,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:30,327 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,SelfDestructingSolverStorable26 [2022-03-18 00:32:30,327 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -92208280, now seen corresponding path program 53 times [2022-03-18 00:32:30,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:30,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1607641407] [2022-03-18 00:32:30,587 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:30,587 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:30,587 INFO L85 PathProgramCache]: Analyzing trace with hash -92208280, now seen corresponding path program 54 times [2022-03-18 00:32:30,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:30,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612678114] [2022-03-18 00:32:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:30,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:30,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612678114] [2022-03-18 00:32:30,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612678114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769247814] [2022-03-18 00:32:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:30,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:30,840 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) [2022-03-18 00:32:30,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:32:30,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-18 00:32:30,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 00:32:30,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769247814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:31,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-18 00:32:31,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1607641407] [2022-03-18 00:32:31,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1607641407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:31,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:31,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 00:32:31,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976818201] [2022-03-18 00:32:31,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:31,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 00:32:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:31,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 00:32:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:32:31,772 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:32,138 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-18 00:32:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:32:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-18 00:32:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:32,139 INFO L225 Difference]: With dead ends: 74 [2022-03-18 00:32:32,139 INFO L226 Difference]: Without dead ends: 69 [2022-03-18 00:32:32,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3386, Invalid=5356, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:32:32,140 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:32,140 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 58 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:32,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-18 00:32:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-18 00:32:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 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) [2022-03-18 00:32:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-03-18 00:32:32,153 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2022-03-18 00:32:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:32,163 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-03-18 00:32:32,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-03-18 00:32:32,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 00:32:32,164 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:32,164 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:32,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 00:32:32,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 00:32:32,380 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1612662748, now seen corresponding path program 55 times [2022-03-18 00:32:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383348931] [2022-03-18 00:32:32,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:32,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1612662748, now seen corresponding path program 56 times [2022-03-18 00:32:32,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:32,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276652765] [2022-03-18 00:32:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:32,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:33,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:33,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276652765] [2022-03-18 00:32:33,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276652765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:33,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359861065] [2022-03-18 00:32:33,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:33,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:33,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:33,216 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) [2022-03-18 00:32:33,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:32:33,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:33,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 00:32:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:33,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359861065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:34,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:34,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-18 00:32:34,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:34,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383348931] [2022-03-18 00:32:34,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383348931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:34,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:34,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:32:34,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228459545] [2022-03-18 00:32:34,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:34,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:32:34,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:32:34,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=2448, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 00:32:34,370 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:34,864 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-18 00:32:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:32:34,865 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 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 [2022-03-18 00:32:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:34,865 INFO L225 Difference]: With dead ends: 76 [2022-03-18 00:32:34,865 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 00:32:34,866 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3622, Invalid=5690, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:32:34,866 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:34,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 43 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 00:32:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-18 00:32:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-03-18 00:32:34,876 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2022-03-18 00:32:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:34,876 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-03-18 00:32:34,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-03-18 00:32:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 00:32:34,876 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:34,876 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:34,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 00:32:35,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 00:32:35,087 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1814441440, now seen corresponding path program 57 times [2022-03-18 00:32:35,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:35,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1129487181] [2022-03-18 00:32:35,674 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:35,674 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:35,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1814441440, now seen corresponding path program 58 times [2022-03-18 00:32:35,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:35,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506064866] [2022-03-18 00:32:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:35,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:35,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:35,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:35,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506064866] [2022-03-18 00:32:35,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506064866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898807349] [2022-03-18 00:32:35,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:35,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:35,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:35,988 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) [2022-03-18 00:32:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:32:36,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 00:32:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:36,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:36,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898807349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:36,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:36,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-18 00:32:36,899 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:36,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1129487181] [2022-03-18 00:32:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1129487181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:36,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:36,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 00:32:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511802628] [2022-03-18 00:32:36,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:36,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 00:32:36,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 00:32:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1965, Invalid=2591, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:32:36,901 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:37,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:37,295 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-18 00:32:37,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:32:37,296 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 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 [2022-03-18 00:32:37,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:37,296 INFO L225 Difference]: With dead ends: 78 [2022-03-18 00:32:37,296 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 00:32:37,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3866, Invalid=6034, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:32:37,298 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:37,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:37,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 00:32:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-18 00:32:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 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) [2022-03-18 00:32:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-18 00:32:37,308 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2022-03-18 00:32:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:37,308 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-18 00:32:37,308 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:37,308 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-18 00:32:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-18 00:32:37,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:37,308 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:37,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:37,509 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:37,510 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:37,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1021650076, now seen corresponding path program 59 times [2022-03-18 00:32:37,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103121259] [2022-03-18 00:32:37,798 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:37,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:37,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1021650076, now seen corresponding path program 60 times [2022-03-18 00:32:37,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:37,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678324494] [2022-03-18 00:32:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:37,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:38,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:38,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678324494] [2022-03-18 00:32:38,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678324494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:38,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803948126] [2022-03-18 00:32:38,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:38,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:38,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:38,232 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) [2022-03-18 00:32:38,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:32:38,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-18 00:32:38,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 00:32:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:38,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:39,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803948126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:39,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:39,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 00:32:39,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:39,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103121259] [2022-03-18 00:32:39,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103121259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:39,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:39,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:32:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548032788] [2022-03-18 00:32:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:39,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:32:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:32:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:32:39,678 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:40,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:40,291 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-18 00:32:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:32:40,291 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-18 00:32:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:40,292 INFO L225 Difference]: With dead ends: 80 [2022-03-18 00:32:40,292 INFO L226 Difference]: Without dead ends: 75 [2022-03-18 00:32:40,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4118, Invalid=6388, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 00:32:40,294 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:40,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 33 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-18 00:32:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-18 00:32:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 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) [2022-03-18 00:32:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-18 00:32:40,307 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2022-03-18 00:32:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:40,307 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-18 00:32:40,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-18 00:32:40,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-18 00:32:40,307 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:40,308 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:40,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 00:32:40,527 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,SelfDestructingSolverStorable30 [2022-03-18 00:32:40,528 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:40,528 INFO L85 PathProgramCache]: Analyzing trace with hash -641639336, now seen corresponding path program 61 times [2022-03-18 00:32:40,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:40,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1766515352] [2022-03-18 00:32:41,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:41,061 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash -641639336, now seen corresponding path program 62 times [2022-03-18 00:32:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:41,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526502694] [2022-03-18 00:32:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:41,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:41,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526502694] [2022-03-18 00:32:41,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526502694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:41,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084609210] [2022-03-18 00:32:41,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:41,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:41,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:41,512 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) [2022-03-18 00:32:41,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:32:41,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:41,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 00:32:41,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084609210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:42,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-18 00:32:42,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:42,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1766515352] [2022-03-18 00:32:42,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1766515352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:42,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 00:32:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725622654] [2022-03-18 00:32:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:42,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 00:32:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 00:32:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=2889, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:32:42,836 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:43,489 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-18 00:32:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:32:43,489 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 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 [2022-03-18 00:32:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:43,490 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:32:43,490 INFO L226 Difference]: Without dead ends: 77 [2022-03-18 00:32:43,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4378, Invalid=6752, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:32:43,492 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:43,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-18 00:32:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-03-18 00:32:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-03-18 00:32:43,503 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2022-03-18 00:32:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:43,503 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-03-18 00:32:43,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-03-18 00:32:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 00:32:43,503 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:43,503 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:43,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:43,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:43,720 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1334930156, now seen corresponding path program 63 times [2022-03-18 00:32:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551332278] [2022-03-18 00:32:44,267 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:44,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1334930156, now seen corresponding path program 64 times [2022-03-18 00:32:44,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879512714] [2022-03-18 00:32:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:44,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:44,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879512714] [2022-03-18 00:32:44,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879512714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:44,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991404980] [2022-03-18 00:32:44,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:44,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:44,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:44,761 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) [2022-03-18 00:32:44,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:32:44,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:44,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:32:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:45,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:45,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991404980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:45,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:45,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-18 00:32:45,963 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:45,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551332278] [2022-03-18 00:32:45,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551332278] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:45,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:45,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:32:45,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145349371] [2022-03-18 00:32:45,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:45,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:32:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:32:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2358, Invalid=3044, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 00:32:45,966 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:46,557 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-18 00:32:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:32:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 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 [2022-03-18 00:32:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:46,558 INFO L225 Difference]: With dead ends: 84 [2022-03-18 00:32:46,558 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 00:32:46,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4646, Invalid=7126, Unknown=0, NotChecked=0, Total=11772 [2022-03-18 00:32:46,559 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:46,560 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 38 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 00:32:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-18 00:32:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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) [2022-03-18 00:32:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-03-18 00:32:46,569 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2022-03-18 00:32:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:46,569 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-03-18 00:32:46,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.868421052631579) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-03-18 00:32:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 00:32:46,570 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:46,570 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:46,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:46,772 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:46,773 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1867477296, now seen corresponding path program 65 times [2022-03-18 00:32:46,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:46,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623093557] [2022-03-18 00:32:47,108 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:47,108 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:47,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1867477296, now seen corresponding path program 66 times [2022-03-18 00:32:47,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:47,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332178084] [2022-03-18 00:32:47,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:47,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:47,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:47,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332178084] [2022-03-18 00:32:47,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332178084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942451215] [2022-03-18 00:32:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:47,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:47,657 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) [2022-03-18 00:32:47,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:32:47,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-18 00:32:47,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 00:32:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:47,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:49,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942451215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:49,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:49,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-18 00:32:49,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:49,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623093557] [2022-03-18 00:32:49,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623093557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:49,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:49,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 00:32:49,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709668649] [2022-03-18 00:32:49,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:49,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 00:32:49,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:49,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 00:32:49,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=3203, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 00:32:49,209 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:49,879 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-18 00:32:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:32:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-18 00:32:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:49,880 INFO L225 Difference]: With dead ends: 86 [2022-03-18 00:32:49,880 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 00:32:49,882 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4922, Invalid=7510, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:32:49,882 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 78 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:49,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 43 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 00:32:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-18 00:32:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 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) [2022-03-18 00:32:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-03-18 00:32:49,892 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2022-03-18 00:32:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:49,892 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-03-18 00:32:49,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-03-18 00:32:49,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 00:32:49,893 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:49,893 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:49,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:50,100 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,SelfDestructingSolverStorable33 [2022-03-18 00:32:50,101 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1750796684, now seen corresponding path program 67 times [2022-03-18 00:32:50,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696603486] [2022-03-18 00:32:50,664 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:50,664 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:50,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1750796684, now seen corresponding path program 68 times [2022-03-18 00:32:50,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:50,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744690133] [2022-03-18 00:32:50,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:50,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:51,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744690133] [2022-03-18 00:32:51,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744690133] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:51,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767865348] [2022-03-18 00:32:51,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:51,147 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) [2022-03-18 00:32:51,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:32:51,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:32:51,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:51,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:51,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:52,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767865348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:52,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-18 00:32:52,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696603486] [2022-03-18 00:32:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696603486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:52,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:32:52,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664439067] [2022-03-18 00:32:52,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:52,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:32:52,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:32:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=3366, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 00:32:52,682 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:53,298 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-18 00:32:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:32:53,298 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 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 [2022-03-18 00:32:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:53,298 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:32:53,298 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 00:32:53,300 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5206, Invalid=7904, Unknown=0, NotChecked=0, Total=13110 [2022-03-18 00:32:53,300 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 80 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:53,300 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 00:32:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-18 00:32:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:53,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-03-18 00:32:53,312 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2022-03-18 00:32:53,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:53,312 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-03-18 00:32:53,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:53,312 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-03-18 00:32:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 00:32:53,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:53,315 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:53,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:53,532 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,SelfDestructingSolverStorable34 [2022-03-18 00:32:53,533 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash -11418296, now seen corresponding path program 69 times [2022-03-18 00:32:53,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:53,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302712175] [2022-03-18 00:32:54,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:54,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:54,020 INFO L85 PathProgramCache]: Analyzing trace with hash -11418296, now seen corresponding path program 70 times [2022-03-18 00:32:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:54,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070570676] [2022-03-18 00:32:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:54,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:54,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070570676] [2022-03-18 00:32:54,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070570676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:54,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790040270] [2022-03-18 00:32:54,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:54,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:54,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:54,672 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) [2022-03-18 00:32:54,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:32:54,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 00:32:54,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:54,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:56,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790040270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:56,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:56,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-18 00:32:56,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:56,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302712175] [2022-03-18 00:32:56,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302712175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:56,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:56,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 00:32:56,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078171107] [2022-03-18 00:32:56,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:56,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 00:32:56,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:56,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 00:32:56,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2787, Invalid=3533, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:32:56,236 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:56,981 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-18 00:32:56,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:32:56,981 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 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 [2022-03-18 00:32:56,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:56,982 INFO L225 Difference]: With dead ends: 90 [2022-03-18 00:32:56,982 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 00:32:56,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5498, Invalid=8308, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:32:56,983 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 82 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:56,985 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 58 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:56,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 00:32:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-03-18 00:32:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 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) [2022-03-18 00:32:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-18 00:32:57,002 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2022-03-18 00:32:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:57,002 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-18 00:32:57,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:32:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-18 00:32:57,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-18 00:32:57,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:57,003 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:57,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:57,207 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,SelfDestructingSolverStorable35 [2022-03-18 00:32:57,207 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1282899452, now seen corresponding path program 71 times [2022-03-18 00:32:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:57,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99230190] [2022-03-18 00:32:57,517 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:32:57,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1282899452, now seen corresponding path program 72 times [2022-03-18 00:32:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:57,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383320003] [2022-03-18 00:32:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:57,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:58,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383320003] [2022-03-18 00:32:58,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383320003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:58,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469451778] [2022-03-18 00:32:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:58,014 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) [2022-03-18 00:32:58,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 00:32:58,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-18 00:32:58,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 00:32:58,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:58,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:32:59,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469451778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:59,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:59,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-18 00:32:59,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:59,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99230190] [2022-03-18 00:32:59,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99230190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:59,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:59,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:32:59,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013012071] [2022-03-18 00:32:59,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:59,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:32:59,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:59,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:32:59,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=3704, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:32:59,739 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:00,382 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-18 00:33:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 00:33:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-18 00:33:00,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:00,383 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:33:00,383 INFO L226 Difference]: Without dead ends: 87 [2022-03-18 00:33:00,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5798, Invalid=8722, Unknown=0, NotChecked=0, Total=14520 [2022-03-18 00:33:00,385 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:00,385 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 33 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-18 00:33:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-18 00:33:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 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) [2022-03-18 00:33:00,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-03-18 00:33:00,396 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2022-03-18 00:33:00,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:00,397 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-03-18 00:33:00,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:00,397 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-03-18 00:33:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-18 00:33:00,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:00,397 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:00,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:00,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:00,615 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:00,615 INFO L85 PathProgramCache]: Analyzing trace with hash 889388992, now seen corresponding path program 73 times [2022-03-18 00:33:00,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:00,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [410777032] [2022-03-18 00:33:01,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:01,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:01,190 INFO L85 PathProgramCache]: Analyzing trace with hash 889388992, now seen corresponding path program 74 times [2022-03-18 00:33:01,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:01,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997319056] [2022-03-18 00:33:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:01,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:01,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:01,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997319056] [2022-03-18 00:33:01,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997319056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:01,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338994973] [2022-03-18 00:33:01,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:01,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:01,820 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) [2022-03-18 00:33:01,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 00:33:01,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 00:33:01,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:02,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:03,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:03,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338994973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:03,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:03,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-18 00:33:03,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [410777032] [2022-03-18 00:33:03,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [410777032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:03,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:03,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 00:33:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051327061] [2022-03-18 00:33:03,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:03,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 00:33:03,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:03,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 00:33:03,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3093, Invalid=3879, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:33:03,442 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:04,238 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-18 00:33:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:33:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 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 [2022-03-18 00:33:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:04,239 INFO L225 Difference]: With dead ends: 94 [2022-03-18 00:33:04,239 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 00:33:04,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6106, Invalid=9146, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:33:04,240 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 86 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:04,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 58 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:04,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 00:33:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-18 00:33:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-03-18 00:33:04,252 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2022-03-18 00:33:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:04,253 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-03-18 00:33:04,253 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-03-18 00:33:04,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 00:33:04,253 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:04,253 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:04,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:04,470 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,SelfDestructingSolverStorable37 [2022-03-18 00:33:04,471 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1104477820, now seen corresponding path program 75 times [2022-03-18 00:33:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960246312] [2022-03-18 00:33:04,929 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:04,929 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:04,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1104477820, now seen corresponding path program 76 times [2022-03-18 00:33:04,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:04,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259213333] [2022-03-18 00:33:04,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:04,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:05,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:05,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259213333] [2022-03-18 00:33:05,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259213333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:05,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463133516] [2022-03-18 00:33:05,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:05,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:05,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:05,739 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) [2022-03-18 00:33:05,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 00:33:05,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 00:33:05,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:05,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:07,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463133516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:07,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:07,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-18 00:33:07,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960246312] [2022-03-18 00:33:07,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960246312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:07,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:07,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 00:33:07,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316004407] [2022-03-18 00:33:07,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:07,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 00:33:07,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 00:33:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=4058, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 00:33:07,312 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:08,023 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-18 00:33:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 00:33:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 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 [2022-03-18 00:33:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:08,024 INFO L225 Difference]: With dead ends: 96 [2022-03-18 00:33:08,024 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 00:33:08,026 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6422, Invalid=9580, Unknown=0, NotChecked=0, Total=16002 [2022-03-18 00:33:08,026 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 88 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:08,026 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 48 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 00:33:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-18 00:33:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 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) [2022-03-18 00:33:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-03-18 00:33:08,047 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2022-03-18 00:33:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:08,047 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-03-18 00:33:08,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-03-18 00:33:08,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-18 00:33:08,047 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:08,047 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:08,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:08,260 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,SelfDestructingSolverStorable38 [2022-03-18 00:33:08,261 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:08,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1646411320, now seen corresponding path program 77 times [2022-03-18 00:33:08,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:08,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [945303754] [2022-03-18 00:33:08,812 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:08,812 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1646411320, now seen corresponding path program 78 times [2022-03-18 00:33:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:08,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817283724] [2022-03-18 00:33:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:09,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:09,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:09,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817283724] [2022-03-18 00:33:09,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817283724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:09,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940478815] [2022-03-18 00:33:09,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:09,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:09,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:09,543 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) [2022-03-18 00:33:09,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 00:33:09,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-18 00:33:09,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 00:33:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:11,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940478815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:11,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:11,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-18 00:33:11,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:11,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [945303754] [2022-03-18 00:33:11,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [945303754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:11,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:11,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 00:33:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235574283] [2022-03-18 00:33:11,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:11,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 00:33:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 00:33:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3415, Invalid=4241, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 00:33:11,851 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:12,875 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-18 00:33:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 00:33:12,876 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-18 00:33:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:12,876 INFO L225 Difference]: With dead ends: 98 [2022-03-18 00:33:12,877 INFO L226 Difference]: Without dead ends: 93 [2022-03-18 00:33:12,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6746, Invalid=10024, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:33:12,879 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:12,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 53 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-18 00:33:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-18 00:33:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 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) [2022-03-18 00:33:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-03-18 00:33:12,898 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2022-03-18 00:33:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:12,899 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-03-18 00:33:12,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-03-18 00:33:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 00:33:12,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:12,906 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:12,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:13,130 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,SelfDestructingSolverStorable39 [2022-03-18 00:33:13,131 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:13,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1541505292, now seen corresponding path program 79 times [2022-03-18 00:33:13,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:13,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [800136747] [2022-03-18 00:33:13,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:13,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1541505292, now seen corresponding path program 80 times [2022-03-18 00:33:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:13,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469652427] [2022-03-18 00:33:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:13,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:14,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469652427] [2022-03-18 00:33:14,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469652427] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381105842] [2022-03-18 00:33:14,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:14,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:14,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:14,204 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) [2022-03-18 00:33:14,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 00:33:14,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 00:33:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:14,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:15,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381105842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:15,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:15,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-18 00:33:15,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:15,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [800136747] [2022-03-18 00:33:15,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [800136747] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:15,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:15,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 00:33:15,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510960582] [2022-03-18 00:33:15,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:15,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 00:33:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 00:33:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3582, Invalid=4428, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 00:33:15,977 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:16,755 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-18 00:33:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 00:33:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 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 [2022-03-18 00:33:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:16,755 INFO L225 Difference]: With dead ends: 100 [2022-03-18 00:33:16,755 INFO L226 Difference]: Without dead ends: 95 [2022-03-18 00:33:16,757 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=7078, Invalid=10478, Unknown=0, NotChecked=0, Total=17556 [2022-03-18 00:33:16,757 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:16,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 43 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:16,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-18 00:33:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-18 00:33:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-18 00:33:16,772 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2022-03-18 00:33:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:16,772 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-18 00:33:16,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-18 00:33:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 00:33:16,773 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:16,773 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:16,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:16,991 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,SelfDestructingSolverStorable40 [2022-03-18 00:33:16,992 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:16,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1477279920, now seen corresponding path program 81 times [2022-03-18 00:33:16,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:16,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930227352] [2022-03-18 00:33:17,416 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:17,417 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:17,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1477279920, now seen corresponding path program 82 times [2022-03-18 00:33:17,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776814283] [2022-03-18 00:33:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:17,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:18,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:18,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776814283] [2022-03-18 00:33:18,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776814283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:18,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127799185] [2022-03-18 00:33:18,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:18,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:18,212 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) [2022-03-18 00:33:18,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 00:33:18,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:33:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:18,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:20,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127799185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:20,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:20,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-18 00:33:20,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:20,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930227352] [2022-03-18 00:33:20,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930227352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:20,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:20,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 00:33:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139477861] [2022-03-18 00:33:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:20,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 00:33:20,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 00:33:20,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3753, Invalid=4619, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:33:20,291 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:21,295 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-18 00:33:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-18 00:33:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 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 [2022-03-18 00:33:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:21,296 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:33:21,296 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 00:33:21,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7418, Invalid=10942, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:33:21,297 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 94 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:21,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 38 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 00:33:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-03-18 00:33:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 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) [2022-03-18 00:33:21,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-03-18 00:33:21,330 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2022-03-18 00:33:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:21,330 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-03-18 00:33:21,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.8936170212765957) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-03-18 00:33:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 00:33:21,331 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:21,331 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:21,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:21,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:21,548 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:21,549 INFO L85 PathProgramCache]: Analyzing trace with hash -868023444, now seen corresponding path program 83 times [2022-03-18 00:33:21,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:21,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [492599668] [2022-03-18 00:33:22,413 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:22,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:22,414 INFO L85 PathProgramCache]: Analyzing trace with hash -868023444, now seen corresponding path program 84 times [2022-03-18 00:33:22,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:22,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413094813] [2022-03-18 00:33:22,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:22,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:23,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:23,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:23,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413094813] [2022-03-18 00:33:23,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413094813] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706045521] [2022-03-18 00:33:23,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:23,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:23,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:23,007 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) [2022-03-18 00:33:23,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 00:33:23,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-18 00:33:23,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:23,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 00:33:23,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:23,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706045521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:25,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:25,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-18 00:33:25,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [492599668] [2022-03-18 00:33:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [492599668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:25,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:25,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 00:33:25,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445916936] [2022-03-18 00:33:25,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:25,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 00:33:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 00:33:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4814, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 00:33:25,308 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:26,031 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-18 00:33:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 00:33:26,031 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-18 00:33:26,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:26,037 INFO L225 Difference]: With dead ends: 104 [2022-03-18 00:33:26,037 INFO L226 Difference]: Without dead ends: 99 [2022-03-18 00:33:26,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7766, Invalid=11416, Unknown=0, NotChecked=0, Total=19182 [2022-03-18 00:33:26,044 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:26,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 63 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-18 00:33:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-18 00:33:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 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) [2022-03-18 00:33:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-03-18 00:33:26,063 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2022-03-18 00:33:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:26,064 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-03-18 00:33:26,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-03-18 00:33:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 00:33:26,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:26,065 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:26,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 00:33:26,282 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:26,283 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 153274152, now seen corresponding path program 85 times [2022-03-18 00:33:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1931757806] [2022-03-18 00:33:26,818 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:26,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash 153274152, now seen corresponding path program 86 times [2022-03-18 00:33:26,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:26,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495698553] [2022-03-18 00:33:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:26,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:27,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495698553] [2022-03-18 00:33:27,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495698553] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:27,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281186330] [2022-03-18 00:33:27,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:27,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:27,442 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) [2022-03-18 00:33:27,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 00:33:27,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:27,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:27,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 00:33:27,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:27,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:29,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281186330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:29,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:29,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-18 00:33:29,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1931757806] [2022-03-18 00:33:29,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1931757806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:29,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:29,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 00:33:29,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022844259] [2022-03-18 00:33:29,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:29,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 00:33:29,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:29,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 00:33:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=5013, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 00:33:29,619 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:30,461 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-18 00:33:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-18 00:33:30,461 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 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 [2022-03-18 00:33:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:30,462 INFO L225 Difference]: With dead ends: 106 [2022-03-18 00:33:30,462 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 00:33:30,464 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8122, Invalid=11900, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:33:30,464 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 98 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:30,464 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 48 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 00:33:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-03-18 00:33:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-03-18 00:33:30,480 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2022-03-18 00:33:30,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:30,480 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-03-18 00:33:30,480 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-03-18 00:33:30,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 00:33:30,480 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:30,480 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:30,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 00:33:30,699 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,SelfDestructingSolverStorable43 [2022-03-18 00:33:30,699 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:30,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1927246876, now seen corresponding path program 87 times [2022-03-18 00:33:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:30,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1352646111] [2022-03-18 00:33:31,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:31,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1927246876, now seen corresponding path program 88 times [2022-03-18 00:33:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:31,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146937009] [2022-03-18 00:33:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:31,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:31,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146937009] [2022-03-18 00:33:31,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146937009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:31,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984857362] [2022-03-18 00:33:31,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:31,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:31,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:31,860 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) [2022-03-18 00:33:31,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 00:33:31,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:31,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 00:33:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:34,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984857362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:34,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:34,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-18 00:33:34,388 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:34,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1352646111] [2022-03-18 00:33:34,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1352646111] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:34,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:34,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 00:33:34,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082198707] [2022-03-18 00:33:34,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:34,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 00:33:34,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:34,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 00:33:34,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=5216, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 00:33:34,389 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 50 states, 50 states have (on average 1.9) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:35,435 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-18 00:33:35,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 00:33:35,435 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.9) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 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 [2022-03-18 00:33:35,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:35,435 INFO L225 Difference]: With dead ends: 108 [2022-03-18 00:33:35,435 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 00:33:35,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8486, Invalid=12394, Unknown=0, NotChecked=0, Total=20880 [2022-03-18 00:33:35,438 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 100 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:35,438 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 38 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:33:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 00:33:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-18 00:33:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 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) [2022-03-18 00:33:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-03-18 00:33:35,473 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2022-03-18 00:33:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:35,473 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-03-18 00:33:35,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.9) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-03-18 00:33:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-18 00:33:35,473 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:35,473 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:35,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:35,690 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,SelfDestructingSolverStorable44 [2022-03-18 00:33:35,691 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash 146805152, now seen corresponding path program 89 times [2022-03-18 00:33:35,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:35,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132164785] [2022-03-18 00:33:36,144 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:36,145 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash 146805152, now seen corresponding path program 90 times [2022-03-18 00:33:36,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:36,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398375941] [2022-03-18 00:33:36,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:36,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:36,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:36,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398375941] [2022-03-18 00:33:36,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398375941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:36,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436775694] [2022-03-18 00:33:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:36,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:36,992 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) [2022-03-18 00:33:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 00:33:37,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-18 00:33:37,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 00:33:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:37,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:39,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436775694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:39,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:39,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-18 00:33:39,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:39,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132164785] [2022-03-18 00:33:39,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132164785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:39,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:39,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 00:33:39,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373660892] [2022-03-18 00:33:39,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:39,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 00:33:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:39,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 00:33:39,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4477, Invalid=5423, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:33:39,030 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:40,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:40,112 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-18 00:33:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-18 00:33:40,112 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-18 00:33:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:40,113 INFO L225 Difference]: With dead ends: 110 [2022-03-18 00:33:40,113 INFO L226 Difference]: Without dead ends: 105 [2022-03-18 00:33:40,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8858, Invalid=12898, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 00:33:40,115 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:40,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 43 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:40,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-18 00:33:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-03-18 00:33:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 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) [2022-03-18 00:33:40,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-18 00:33:40,143 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2022-03-18 00:33:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:40,143 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-18 00:33:40,143 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-18 00:33:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 00:33:40,143 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:40,143 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:40,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:40,361 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,SelfDestructingSolverStorable45 [2022-03-18 00:33:40,361 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:40,361 INFO L85 PathProgramCache]: Analyzing trace with hash 445978716, now seen corresponding path program 91 times [2022-03-18 00:33:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:40,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611814591] [2022-03-18 00:33:40,739 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:40,739 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash 445978716, now seen corresponding path program 92 times [2022-03-18 00:33:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99088056] [2022-03-18 00:33:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99088056] [2022-03-18 00:33:41,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99088056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886326491] [2022-03-18 00:33:41,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:41,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:41,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:41,758 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) [2022-03-18 00:33:41,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 00:33:41,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:41,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 00:33:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:42,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:43,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886326491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:43,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:43,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-18 00:33:43,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:43,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611814591] [2022-03-18 00:33:43,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611814591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:43,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:43,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 00:33:43,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475650048] [2022-03-18 00:33:43,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:43,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 00:33:43,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:43,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 00:33:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 00:33:43,984 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:44,849 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-18 00:33:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 00:33:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 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 [2022-03-18 00:33:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:44,851 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:33:44,852 INFO L226 Difference]: Without dead ends: 107 [2022-03-18 00:33:44,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9238, Invalid=13412, Unknown=0, NotChecked=0, Total=22650 [2022-03-18 00:33:44,853 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:44,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 43 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-18 00:33:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-18 00:33:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-03-18 00:33:44,877 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2022-03-18 00:33:44,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:44,878 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-03-18 00:33:44,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9038461538461537) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-03-18 00:33:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 00:33:44,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:44,878 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:44,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-18 00:33:45,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:45,091 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:45,092 INFO L85 PathProgramCache]: Analyzing trace with hash 188964888, now seen corresponding path program 93 times [2022-03-18 00:33:45,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294092761] [2022-03-18 00:33:45,439 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:45,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:45,439 INFO L85 PathProgramCache]: Analyzing trace with hash 188964888, now seen corresponding path program 94 times [2022-03-18 00:33:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:45,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431911098] [2022-03-18 00:33:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431911098] [2022-03-18 00:33:46,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431911098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:46,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689317498] [2022-03-18 00:33:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:33:46,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:46,514 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) [2022-03-18 00:33:46,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 00:33:46,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:33:46,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 00:33:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:46,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689317498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:48,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:48,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-18 00:33:48,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:48,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294092761] [2022-03-18 00:33:48,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294092761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:48,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:48,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 00:33:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961570994] [2022-03-18 00:33:48,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:48,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 00:33:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 00:33:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4863, Invalid=5849, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 00:33:48,654 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:49,704 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-18 00:33:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-18 00:33:49,704 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 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 [2022-03-18 00:33:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:49,719 INFO L225 Difference]: With dead ends: 114 [2022-03-18 00:33:49,720 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 00:33:49,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9626, Invalid=13936, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 00:33:49,723 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:49,723 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 48 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:33:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 00:33:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-03-18 00:33:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 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) [2022-03-18 00:33:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-03-18 00:33:49,741 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2022-03-18 00:33:49,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:49,741 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-03-18 00:33:49,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9056603773584906) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:49,741 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-03-18 00:33:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 00:33:49,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:49,742 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:49,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:49,959 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,SelfDestructingSolverStorable47 [2022-03-18 00:33:49,960 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1988187948, now seen corresponding path program 95 times [2022-03-18 00:33:49,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:49,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684901903] [2022-03-18 00:33:50,582 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:50,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:50,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1988187948, now seen corresponding path program 96 times [2022-03-18 00:33:50,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:50,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534398069] [2022-03-18 00:33:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:50,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:51,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534398069] [2022-03-18 00:33:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534398069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233529158] [2022-03-18 00:33:51,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:33:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:51,465 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) [2022-03-18 00:33:51,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 00:33:51,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-18 00:33:51,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 00:33:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:51,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233529158] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:54,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-18 00:33:54,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:54,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684901903] [2022-03-18 00:33:54,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684901903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:54,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:54,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 00:33:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489428504] [2022-03-18 00:33:54,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:54,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 00:33:54,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 00:33:54,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:33:54,140 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:33:55,561 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-18 00:33:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 00:33:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-18 00:33:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:33:55,562 INFO L225 Difference]: With dead ends: 116 [2022-03-18 00:33:55,562 INFO L226 Difference]: Without dead ends: 111 [2022-03-18 00:33:55,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10022, Invalid=14470, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 00:33:55,569 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 108 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:33:55,569 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 43 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:33:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-18 00:33:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-18 00:33:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 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) [2022-03-18 00:33:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-03-18 00:33:55,593 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2022-03-18 00:33:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:33:55,593 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-03-18 00:33:55,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:33:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-03-18 00:33:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 00:33:55,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:33:55,594 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:33:55,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 00:33:55,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 00:33:55,812 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:33:55,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:33:55,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1711977104, now seen corresponding path program 97 times [2022-03-18 00:33:55,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:55,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307440814] [2022-03-18 00:33:56,206 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:33:56,206 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:33:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1711977104, now seen corresponding path program 98 times [2022-03-18 00:33:56,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:33:56,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422757728] [2022-03-18 00:33:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:33:56,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:33:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:33:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:33:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:33:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422757728] [2022-03-18 00:33:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422757728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:33:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148755073] [2022-03-18 00:33:56,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:33:56,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:33:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:33:56,984 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) [2022-03-18 00:33:56,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 00:33:57,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:33:57,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:33:57,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 00:33:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:33:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:57,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:33:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:33:59,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148755073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:33:59,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:33:59,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-18 00:33:59,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:33:59,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307440814] [2022-03-18 00:33:59,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307440814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:33:59,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:33:59,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 00:33:59,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387569317] [2022-03-18 00:33:59,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:33:59,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 00:33:59,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:33:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 00:33:59,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5265, Invalid=6291, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 00:33:59,165 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:00,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:00,005 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-18 00:34:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-18 00:34:00,006 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 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 [2022-03-18 00:34:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:00,022 INFO L225 Difference]: With dead ends: 118 [2022-03-18 00:34:00,022 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 00:34:00,024 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10426, Invalid=15014, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 00:34:00,024 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 110 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:00,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 58 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 00:34:00,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-18 00:34:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-03-18 00:34:00,047 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2022-03-18 00:34:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:00,047 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-03-18 00:34:00,047 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-03-18 00:34:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 00:34:00,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:00,048 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:00,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-18 00:34:00,263 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,SelfDestructingSolverStorable49 [2022-03-18 00:34:00,263 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:00,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:00,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1337670988, now seen corresponding path program 99 times [2022-03-18 00:34:00,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:00,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068755215] [2022-03-18 00:34:00,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:00,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1337670988, now seen corresponding path program 100 times [2022-03-18 00:34:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:00,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85968525] [2022-03-18 00:34:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:00,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:01,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85968525] [2022-03-18 00:34:01,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85968525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643415199] [2022-03-18 00:34:01,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:01,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:01,536 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) [2022-03-18 00:34:01,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 00:34:01,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:01,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-18 00:34:01,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:01,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643415199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:04,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:04,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-18 00:34:04,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:04,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068755215] [2022-03-18 00:34:04,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068755215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:04,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:04,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 00:34:04,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817685069] [2022-03-18 00:34:04,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:04,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 00:34:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:04,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 00:34:04,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=6518, Unknown=0, NotChecked=0, Total=11990 [2022-03-18 00:34:04,348 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:05,621 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-18 00:34:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 00:34:05,621 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 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 [2022-03-18 00:34:05,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:05,622 INFO L225 Difference]: With dead ends: 120 [2022-03-18 00:34:05,622 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 00:34:05,637 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10838, Invalid=15568, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 00:34:05,638 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 112 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:05,638 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:34:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 00:34:05,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-18 00:34:05,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 109 states have internal predecessors, (110), 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) [2022-03-18 00:34:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-18 00:34:05,668 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2022-03-18 00:34:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:05,668 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-18 00:34:05,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:05,669 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-18 00:34:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 00:34:05,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:05,669 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:05,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:05,887 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,SelfDestructingSolverStorable50 [2022-03-18 00:34:05,887 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:05,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:05,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1888220920, now seen corresponding path program 101 times [2022-03-18 00:34:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:05,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655135922] [2022-03-18 00:34:06,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:06,477 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:06,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1888220920, now seen corresponding path program 102 times [2022-03-18 00:34:06,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882946987] [2022-03-18 00:34:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:07,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882946987] [2022-03-18 00:34:07,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882946987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062619550] [2022-03-18 00:34:07,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:34:07,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:07,613 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) [2022-03-18 00:34:07,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 00:34:07,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-18 00:34:07,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 00:34:07,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:07,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:10,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062619550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:10,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:10,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-18 00:34:10,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:10,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655135922] [2022-03-18 00:34:10,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655135922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:10,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:10,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 00:34:10,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945930404] [2022-03-18 00:34:10,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:10,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 00:34:10,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:10,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 00:34:10,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6749, Unknown=0, NotChecked=0, Total=12432 [2022-03-18 00:34:10,309 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:11,583 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-18 00:34:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-18 00:34:11,583 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-18 00:34:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:11,584 INFO L225 Difference]: With dead ends: 122 [2022-03-18 00:34:11,584 INFO L226 Difference]: Without dead ends: 117 [2022-03-18 00:34:11,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11258, Invalid=16132, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 00:34:11,588 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 114 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:11,589 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 63 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-18 00:34:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-03-18 00:34:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.009009009009009) internal successors, (112), 111 states have internal predecessors, (112), 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) [2022-03-18 00:34:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-03-18 00:34:11,625 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2022-03-18 00:34:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:11,625 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-03-18 00:34:11,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-03-18 00:34:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 00:34:11,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:11,626 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:11,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-18 00:34:11,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:11,835 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1003956796, now seen corresponding path program 103 times [2022-03-18 00:34:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:11,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012524307] [2022-03-18 00:34:12,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:12,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1003956796, now seen corresponding path program 104 times [2022-03-18 00:34:12,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:12,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499032174] [2022-03-18 00:34:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:13,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:13,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499032174] [2022-03-18 00:34:13,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499032174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:13,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91330808] [2022-03-18 00:34:13,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:13,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:13,618 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) [2022-03-18 00:34:13,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 00:34:13,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:13,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:13,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 00:34:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:13,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91330808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:16,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-18 00:34:16,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:16,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012524307] [2022-03-18 00:34:16,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012524307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:16,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:16,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 00:34:16,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795414500] [2022-03-18 00:34:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:16,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 00:34:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:16,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 00:34:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5898, Invalid=6984, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 00:34:16,357 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:17,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:17,715 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-18 00:34:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 00:34:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 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 [2022-03-18 00:34:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:17,716 INFO L225 Difference]: With dead ends: 124 [2022-03-18 00:34:17,716 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 00:34:17,717 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11686, Invalid=16706, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 00:34:17,718 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 116 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:17,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 53 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:34:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 00:34:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-18 00:34:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.008849557522124) internal successors, (114), 113 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-03-18 00:34:17,739 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2022-03-18 00:34:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:17,739 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-03-18 00:34:17,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-03-18 00:34:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 00:34:17,740 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:17,740 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:17,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:17,958 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,SelfDestructingSolverStorable52 [2022-03-18 00:34:17,958 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:17,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1629658240, now seen corresponding path program 105 times [2022-03-18 00:34:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:17,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631975077] [2022-03-18 00:34:18,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:18,392 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1629658240, now seen corresponding path program 106 times [2022-03-18 00:34:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101649853] [2022-03-18 00:34:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:19,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101649853] [2022-03-18 00:34:19,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101649853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:19,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474858187] [2022-03-18 00:34:19,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:19,493 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) [2022-03-18 00:34:19,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 00:34:19,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:19,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:19,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:34:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:19,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:22,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474858187] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:22,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:22,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-18 00:34:22,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:22,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631975077] [2022-03-18 00:34:22,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631975077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:22,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:22,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 00:34:22,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640687983] [2022-03-18 00:34:22,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:22,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 00:34:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:22,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 00:34:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=7223, Unknown=0, NotChecked=0, Total=13340 [2022-03-18 00:34:22,598 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand has 59 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:23,718 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-18 00:34:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-18 00:34:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 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 [2022-03-18 00:34:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:23,719 INFO L225 Difference]: With dead ends: 126 [2022-03-18 00:34:23,719 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 00:34:23,722 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12122, Invalid=17290, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 00:34:23,722 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:23,722 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 28 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 00:34:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-18 00:34:23,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.008695652173913) internal successors, (116), 115 states have internal predecessors, (116), 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) [2022-03-18 00:34:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-03-18 00:34:23,768 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2022-03-18 00:34:23,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:23,768 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-03-18 00:34:23,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:23,768 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-03-18 00:34:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-18 00:34:23,769 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:23,769 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:23,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:23,992 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:23,992 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:23,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1633324484, now seen corresponding path program 107 times [2022-03-18 00:34:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:23,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [950028464] [2022-03-18 00:34:24,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:24,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:24,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1633324484, now seen corresponding path program 108 times [2022-03-18 00:34:24,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471700924] [2022-03-18 00:34:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:26,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:26,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:26,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471700924] [2022-03-18 00:34:26,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471700924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:26,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734297337] [2022-03-18 00:34:26,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:34:26,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:26,064 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) [2022-03-18 00:34:26,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 00:34:26,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-18 00:34:26,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:26,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-18 00:34:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:26,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:30,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734297337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:30,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:30,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-18 00:34:30,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [950028464] [2022-03-18 00:34:30,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [950028464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:30,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:30,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 00:34:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703592551] [2022-03-18 00:34:30,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:30,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 00:34:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 00:34:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:34:30,023 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:31,261 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-18 00:34:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 00:34:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-18 00:34:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:31,270 INFO L225 Difference]: With dead ends: 128 [2022-03-18 00:34:31,270 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 00:34:31,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=12566, Invalid=17884, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 00:34:31,272 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:31,272 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 53 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 00:34:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-18 00:34:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 117 states have internal predecessors, (118), 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) [2022-03-18 00:34:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-03-18 00:34:31,305 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2022-03-18 00:34:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:31,305 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-03-18 00:34:31,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9166666666666667) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-03-18 00:34:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 00:34:31,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:31,306 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:31,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:31,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:31,521 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash -861617672, now seen corresponding path program 109 times [2022-03-18 00:34:31,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:31,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435772831] [2022-03-18 00:34:32,325 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:32,325 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash -861617672, now seen corresponding path program 110 times [2022-03-18 00:34:32,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:32,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697041396] [2022-03-18 00:34:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:33,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697041396] [2022-03-18 00:34:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697041396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69871271] [2022-03-18 00:34:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:33,536 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) [2022-03-18 00:34:33,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 00:34:33,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:33,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 00:34:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:33,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69871271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:37,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:37,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-18 00:34:37,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:37,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435772831] [2022-03-18 00:34:37,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435772831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:37,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:37,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 00:34:37,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095094721] [2022-03-18 00:34:37,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:37,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 00:34:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:37,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 00:34:37,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6567, Invalid=7713, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 00:34:37,498 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:39,064 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-18 00:34:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-18 00:34:39,065 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 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 [2022-03-18 00:34:39,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:39,068 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:34:39,069 INFO L226 Difference]: Without dead ends: 125 [2022-03-18 00:34:39,071 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=13018, Invalid=18488, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 00:34:39,071 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:39,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 53 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-18 00:34:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-18 00:34:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 119 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-18 00:34:39,113 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2022-03-18 00:34:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:39,113 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-18 00:34:39,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9180327868852458) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-18 00:34:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-18 00:34:39,114 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:39,114 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:39,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:39,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:39,327 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2014253748, now seen corresponding path program 111 times [2022-03-18 00:34:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:39,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [174892591] [2022-03-18 00:34:40,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:40,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2014253748, now seen corresponding path program 112 times [2022-03-18 00:34:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:40,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349266111] [2022-03-18 00:34:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:41,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349266111] [2022-03-18 00:34:41,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349266111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:41,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452745141] [2022-03-18 00:34:41,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:34:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:41,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:41,161 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) [2022-03-18 00:34:41,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 00:34:41,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:34:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:41,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-18 00:34:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:41,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:44,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452745141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:44,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:44,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-18 00:34:44,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [174892591] [2022-03-18 00:34:44,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [174892591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:44,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:44,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 00:34:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994401804] [2022-03-18 00:34:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:44,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 00:34:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:44,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 00:34:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6798, Invalid=7964, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 00:34:44,589 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:45,660 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-18 00:34:45,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 00:34:45,661 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 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 [2022-03-18 00:34:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:45,661 INFO L225 Difference]: With dead ends: 132 [2022-03-18 00:34:45,661 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 00:34:45,663 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13478, Invalid=19102, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 00:34:45,664 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 124 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:45,664 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 00:34:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-18 00:34:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 121 states have internal predecessors, (122), 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) [2022-03-18 00:34:45,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-03-18 00:34:45,701 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2022-03-18 00:34:45,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:45,701 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-03-18 00:34:45,701 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-03-18 00:34:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 00:34:45,701 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:45,701 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:45,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-18 00:34:45,918 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:45,918 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash -232250256, now seen corresponding path program 113 times [2022-03-18 00:34:45,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:45,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425814167] [2022-03-18 00:34:46,398 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:46,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash -232250256, now seen corresponding path program 114 times [2022-03-18 00:34:46,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:46,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148907226] [2022-03-18 00:34:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:46,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:47,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148907226] [2022-03-18 00:34:47,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148907226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:47,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083505971] [2022-03-18 00:34:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:34:47,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:47,240 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) [2022-03-18 00:34:47,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 00:34:47,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-18 00:34:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 00:34:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:47,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:49,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083505971] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:49,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:49,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-18 00:34:49,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:49,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425814167] [2022-03-18 00:34:49,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425814167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:49,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:49,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 00:34:49,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539054730] [2022-03-18 00:34:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:49,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 00:34:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:49,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 00:34:49,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7033, Invalid=8219, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:34:49,707 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand has 63 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:50,998 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-18 00:34:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-18 00:34:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-18 00:34:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:50,999 INFO L225 Difference]: With dead ends: 134 [2022-03-18 00:34:50,999 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 00:34:51,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=13946, Invalid=19726, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 00:34:51,000 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:51,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 33 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 00:34:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-03-18 00:34:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.008130081300813) internal successors, (124), 123 states have internal predecessors, (124), 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) [2022-03-18 00:34:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-03-18 00:34:51,024 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2022-03-18 00:34:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:51,024 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-03-18 00:34:51,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9206349206349207) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:51,024 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-03-18 00:34:51,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 00:34:51,024 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:51,024 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:51,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:51,235 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,SelfDestructingSolverStorable57 [2022-03-18 00:34:51,237 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:51,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1245951788, now seen corresponding path program 115 times [2022-03-18 00:34:51,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:51,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640249986] [2022-03-18 00:34:51,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:51,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:51,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1245951788, now seen corresponding path program 116 times [2022-03-18 00:34:51,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:51,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424602608] [2022-03-18 00:34:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:51,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:34:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:34:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:52,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:34:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424602608] [2022-03-18 00:34:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424602608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:34:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556578568] [2022-03-18 00:34:52,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:34:52,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:34:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:34:52,574 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) [2022-03-18 00:34:52,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 00:34:52,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:34:52,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:34:52,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-18 00:34:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:34:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:52,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:34:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:34:56,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556578568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:34:56,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:34:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-18 00:34:56,697 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:34:56,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640249986] [2022-03-18 00:34:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640249986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:34:56,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:34:56,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 00:34:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558008803] [2022-03-18 00:34:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:34:56,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 00:34:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:56,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 00:34:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7272, Invalid=8478, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 00:34:56,698 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand has 64 states, 64 states have (on average 1.921875) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:34:58,210 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-18 00:34:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 00:34:58,210 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.921875) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 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 [2022-03-18 00:34:58,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:34:58,211 INFO L225 Difference]: With dead ends: 136 [2022-03-18 00:34:58,211 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 00:34:58,212 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14422, Invalid=20360, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 00:34:58,213 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 128 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:34:58,213 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 63 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:34:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 00:34:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-18 00:34:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.008) internal successors, (126), 125 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-03-18 00:34:58,251 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2022-03-18 00:34:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:34:58,251 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-03-18 00:34:58,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.921875) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:34:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-03-18 00:34:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-18 00:34:58,252 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:34:58,252 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:34:58,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-18 00:34:58,475 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,SelfDestructingSolverStorable58 [2022-03-18 00:34:58,475 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:34:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:34:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash 163941096, now seen corresponding path program 117 times [2022-03-18 00:34:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:34:58,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590815642] [2022-03-18 00:34:59,281 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:34:59,287 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:34:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 163941096, now seen corresponding path program 118 times [2022-03-18 00:34:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:34:59,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370371395] [2022-03-18 00:34:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:34:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:34:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:00,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370371395] [2022-03-18 00:35:00,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370371395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079209138] [2022-03-18 00:35:00,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:35:00,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:00,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:00,235 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) [2022-03-18 00:35:00,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 00:35:00,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:35:00,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:00,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 00:35:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:00,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:03,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079209138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:03,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:03,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-18 00:35:03,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590815642] [2022-03-18 00:35:03,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590815642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:03,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:03,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 00:35:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857440068] [2022-03-18 00:35:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:03,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 00:35:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 00:35:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7515, Invalid=8741, Unknown=0, NotChecked=0, Total=16256 [2022-03-18 00:35:03,874 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:05,314 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-18 00:35:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-18 00:35:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 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 [2022-03-18 00:35:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:05,315 INFO L225 Difference]: With dead ends: 138 [2022-03-18 00:35:05,315 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 00:35:05,318 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=14906, Invalid=21004, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 00:35:05,318 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 130 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:05,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 43 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:35:05,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 00:35:05,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-18 00:35:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 127 states have internal predecessors, (128), 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) [2022-03-18 00:35:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-03-18 00:35:05,362 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2022-03-18 00:35:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:05,362 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-03-18 00:35:05,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-03-18 00:35:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 00:35:05,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:05,363 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:05,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:05,567 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,SelfDestructingSolverStorable59 [2022-03-18 00:35:05,567 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:05,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:05,568 INFO L85 PathProgramCache]: Analyzing trace with hash -266248284, now seen corresponding path program 119 times [2022-03-18 00:35:05,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1323082436] [2022-03-18 00:35:05,917 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:05,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash -266248284, now seen corresponding path program 120 times [2022-03-18 00:35:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:05,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358171980] [2022-03-18 00:35:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:05,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:07,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:07,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:07,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358171980] [2022-03-18 00:35:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358171980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951250478] [2022-03-18 00:35:07,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:07,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:07,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:07,093 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) [2022-03-18 00:35:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 00:35:07,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-18 00:35:07,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 00:35:07,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:11,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:11,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951250478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:11,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:11,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-18 00:35:11,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:11,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1323082436] [2022-03-18 00:35:11,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1323082436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:11,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:11,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 00:35:11,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197936234] [2022-03-18 00:35:11,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:11,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 00:35:11,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 00:35:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7762, Invalid=9008, Unknown=0, NotChecked=0, Total=16770 [2022-03-18 00:35:11,548 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand has 66 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:12,848 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-18 00:35:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 00:35:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-18 00:35:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:12,849 INFO L225 Difference]: With dead ends: 140 [2022-03-18 00:35:12,849 INFO L226 Difference]: Without dead ends: 135 [2022-03-18 00:35:12,851 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15398, Invalid=21658, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 00:35:12,851 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 132 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:12,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 63 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:35:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-18 00:35:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-18 00:35:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 129 states have internal predecessors, (130), 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) [2022-03-18 00:35:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-18 00:35:12,878 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2022-03-18 00:35:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:12,878 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-18 00:35:12,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9242424242424243) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:12,878 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-18 00:35:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 00:35:12,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:12,879 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:12,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:13,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:13,096 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1361382048, now seen corresponding path program 121 times [2022-03-18 00:35:13,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:13,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297184772] [2022-03-18 00:35:13,557 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:13,557 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1361382048, now seen corresponding path program 122 times [2022-03-18 00:35:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:13,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89576268] [2022-03-18 00:35:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:14,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:14,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89576268] [2022-03-18 00:35:14,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89576268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:14,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625867318] [2022-03-18 00:35:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:35:14,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:14,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:14,753 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) [2022-03-18 00:35:14,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 00:35:14,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:35:14,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 00:35:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:15,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:18,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625867318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:18,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:18,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-18 00:35:18,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297184772] [2022-03-18 00:35:18,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297184772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:18,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:18,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 00:35:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665620953] [2022-03-18 00:35:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:18,192 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 00:35:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 00:35:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8013, Invalid=9279, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 00:35:18,194 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand has 67 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:19,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:19,814 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-18 00:35:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-18 00:35:19,815 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 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 [2022-03-18 00:35:19,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:19,815 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:35:19,815 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 00:35:19,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=15898, Invalid=22322, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 00:35:19,817 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:19,817 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 48 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:35:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 00:35:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-18 00:35:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 131 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:19,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-18 00:35:19,844 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2022-03-18 00:35:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:19,844 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-18 00:35:19,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.9253731343283582) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-18 00:35:19,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 00:35:19,845 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:19,845 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:19,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:20,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:20,061 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:20,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:20,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1517941732, now seen corresponding path program 123 times [2022-03-18 00:35:20,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:20,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863976324] [2022-03-18 00:35:20,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:20,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:20,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1517941732, now seen corresponding path program 124 times [2022-03-18 00:35:20,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:20,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452207781] [2022-03-18 00:35:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:20,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:21,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452207781] [2022-03-18 00:35:21,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452207781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:21,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518513049] [2022-03-18 00:35:21,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:35:21,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:21,916 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) [2022-03-18 00:35:21,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 00:35:22,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:35:22,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:22,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-18 00:35:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:22,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:26,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518513049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:26,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:26,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-18 00:35:26,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:26,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863976324] [2022-03-18 00:35:26,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863976324] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:26,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:26,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 00:35:26,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311720269] [2022-03-18 00:35:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:26,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 00:35:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 00:35:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-03-18 00:35:26,751 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand has 68 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:28,526 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-18 00:35:28,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 00:35:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 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 [2022-03-18 00:35:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:28,527 INFO L225 Difference]: With dead ends: 144 [2022-03-18 00:35:28,527 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 00:35:28,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16406, Invalid=22996, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 00:35:28,529 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 136 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:28,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 33 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:35:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 00:35:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-18 00:35:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 133 states have internal predecessors, (134), 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) [2022-03-18 00:35:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-03-18 00:35:28,565 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2022-03-18 00:35:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:28,565 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-03-18 00:35:28,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-03-18 00:35:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 00:35:28,567 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:28,567 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:28,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:28,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:28,783 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1647942696, now seen corresponding path program 125 times [2022-03-18 00:35:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:28,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [991082620] [2022-03-18 00:35:29,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:29,577 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1647942696, now seen corresponding path program 126 times [2022-03-18 00:35:29,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:29,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737245534] [2022-03-18 00:35:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:30,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737245534] [2022-03-18 00:35:30,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737245534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628819230] [2022-03-18 00:35:30,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:30,650 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) [2022-03-18 00:35:30,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 00:35:30,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-18 00:35:30,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 00:35:30,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:31,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:34,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628819230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:34,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:34,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-18 00:35:34,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [991082620] [2022-03-18 00:35:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [991082620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:34,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:34,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 00:35:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129629134] [2022-03-18 00:35:34,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:34,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 00:35:34,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:34,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 00:35:34,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=9833, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 00:35:34,426 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:35,755 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-18 00:35:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 00:35:35,755 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-18 00:35:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:35,756 INFO L225 Difference]: With dead ends: 146 [2022-03-18 00:35:35,756 INFO L226 Difference]: Without dead ends: 141 [2022-03-18 00:35:35,757 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=16922, Invalid=23680, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 00:35:35,758 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:35,759 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 48 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:35:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-18 00:35:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-03-18 00:35:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 135 states have internal predecessors, (136), 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) [2022-03-18 00:35:35,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-03-18 00:35:35,795 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2022-03-18 00:35:35,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:35,795 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-03-18 00:35:35,796 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:35,796 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-03-18 00:35:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-18 00:35:35,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:35,796 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:35,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:35,999 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,SelfDestructingSolverStorable63 [2022-03-18 00:35:36,000 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2024817516, now seen corresponding path program 127 times [2022-03-18 00:35:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:36,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500699696] [2022-03-18 00:35:36,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:36,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2024817516, now seen corresponding path program 128 times [2022-03-18 00:35:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:36,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909624647] [2022-03-18 00:35:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:36,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:37,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:37,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:37,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909624647] [2022-03-18 00:35:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909624647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139884888] [2022-03-18 00:35:37,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:35:37,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:37,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:37,358 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) [2022-03-18 00:35:37,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 00:35:37,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:35:37,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:37,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 00:35:37,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:37,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139884888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:41,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:41,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-18 00:35:41,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:41,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500699696] [2022-03-18 00:35:41,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500699696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:41,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:41,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 00:35:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781388465] [2022-03-18 00:35:41,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:41,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 00:35:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 00:35:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=10116, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 00:35:41,961 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:43,641 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-18 00:35:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 00:35:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 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 [2022-03-18 00:35:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:43,642 INFO L225 Difference]: With dead ends: 148 [2022-03-18 00:35:43,642 INFO L226 Difference]: Without dead ends: 143 [2022-03-18 00:35:43,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17446, Invalid=24374, Unknown=0, NotChecked=0, Total=41820 [2022-03-18 00:35:43,644 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:43,644 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 58 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:35:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-18 00:35:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-18 00:35:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 137 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-03-18 00:35:43,674 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2022-03-18 00:35:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:43,674 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-03-18 00:35:43,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-03-18 00:35:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-18 00:35:43,674 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:43,674 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:43,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-18 00:35:43,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:43,876 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:43,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:43,877 INFO L85 PathProgramCache]: Analyzing trace with hash 870700624, now seen corresponding path program 129 times [2022-03-18 00:35:43,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:43,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [239731529] [2022-03-18 00:35:44,360 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:44,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:44,360 INFO L85 PathProgramCache]: Analyzing trace with hash 870700624, now seen corresponding path program 130 times [2022-03-18 00:35:44,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:44,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143991104] [2022-03-18 00:35:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:44,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:45,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143991104] [2022-03-18 00:35:45,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143991104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714364438] [2022-03-18 00:35:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:35:45,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:45,685 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) [2022-03-18 00:35:45,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 00:35:45,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:35:45,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 00:35:45,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:45,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714364438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:49,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 00:35:49,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:49,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [239731529] [2022-03-18 00:35:49,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [239731529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:49,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:49,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 00:35:49,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397602556] [2022-03-18 00:35:49,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:49,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 00:35:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:49,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 00:35:49,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9057, Invalid=10403, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 00:35:49,023 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:51,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:35:51,172 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-18 00:35:51,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-18 00:35:51,173 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 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 [2022-03-18 00:35:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:35:51,174 INFO L225 Difference]: With dead ends: 150 [2022-03-18 00:35:51,174 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 00:35:51,176 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=17978, Invalid=25078, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 00:35:51,176 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:35:51,178 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 63 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:35:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 00:35:51,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-03-18 00:35:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 139 states have internal predecessors, (140), 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) [2022-03-18 00:35:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-18 00:35:51,227 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2022-03-18 00:35:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:35:51,227 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-18 00:35:51,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.9295774647887325) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:35:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-18 00:35:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 00:35:51,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:35:51,228 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:35:51,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-18 00:35:51,435 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,SelfDestructingSolverStorable65 [2022-03-18 00:35:51,435 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:35:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:35:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 324825356, now seen corresponding path program 131 times [2022-03-18 00:35:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:51,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [226444021] [2022-03-18 00:35:52,106 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:35:52,106 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:35:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash 324825356, now seen corresponding path program 132 times [2022-03-18 00:35:52,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:35:52,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860136004] [2022-03-18 00:35:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:35:52,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:35:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:53,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:35:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:35:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:53,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:35:53,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860136004] [2022-03-18 00:35:53,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860136004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:35:53,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969322966] [2022-03-18 00:35:53,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:35:53,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:35:53,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:35:53,645 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) [2022-03-18 00:35:53,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 00:35:53,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-18 00:35:53,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:35:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-18 00:35:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:35:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:54,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:35:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:35:58,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969322966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:35:58,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:35:58,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-18 00:35:58,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:35:58,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [226444021] [2022-03-18 00:35:58,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [226444021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:35:58,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:35:58,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 00:35:58,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582588478] [2022-03-18 00:35:58,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:35:58,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 00:35:58,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:35:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 00:35:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9328, Invalid=10694, Unknown=0, NotChecked=0, Total=20022 [2022-03-18 00:35:58,826 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand has 72 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:00,894 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-18 00:36:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 00:36:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-18 00:36:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:00,896 INFO L225 Difference]: With dead ends: 152 [2022-03-18 00:36:00,896 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 00:36:00,898 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=18518, Invalid=25792, Unknown=0, NotChecked=0, Total=44310 [2022-03-18 00:36:00,899 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:00,900 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 53 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 00:36:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-18 00:36:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 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) [2022-03-18 00:36:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-03-18 00:36:00,970 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-03-18 00:36:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:00,970 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-03-18 00:36:00,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9305555555555556) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-03-18 00:36:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 00:36:00,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:00,971 INFO L500 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:00,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:01,192 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,SelfDestructingSolverStorable66 [2022-03-18 00:36:01,192 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:01,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:01,192 INFO L85 PathProgramCache]: Analyzing trace with hash -275297080, now seen corresponding path program 133 times [2022-03-18 00:36:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [353524077] [2022-03-18 00:36:04,030 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:04,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -275297080, now seen corresponding path program 134 times [2022-03-18 00:36:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:04,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099158929] [2022-03-18 00:36:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:05,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:05,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099158929] [2022-03-18 00:36:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099158929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212627450] [2022-03-18 00:36:05,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:36:05,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:05,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:05,879 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) [2022-03-18 00:36:05,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 00:36:05,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:36:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 00:36:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:06,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212627450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:11,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:11,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-18 00:36:11,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:11,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [353524077] [2022-03-18 00:36:11,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [353524077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:11,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:11,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 00:36:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829997334] [2022-03-18 00:36:11,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:11,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 00:36:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 00:36:11,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9603, Invalid=10989, Unknown=0, NotChecked=0, Total=20592 [2022-03-18 00:36:11,556 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:13,362 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-03-18 00:36:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-18 00:36:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 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 [2022-03-18 00:36:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:13,364 INFO L225 Difference]: With dead ends: 154 [2022-03-18 00:36:13,364 INFO L226 Difference]: Without dead ends: 149 [2022-03-18 00:36:13,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=19066, Invalid=26516, Unknown=0, NotChecked=0, Total=45582 [2022-03-18 00:36:13,373 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 146 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:13,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 53 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-18 00:36:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-18 00:36:13,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.006993006993007) internal successors, (144), 143 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:13,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-03-18 00:36:13,411 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2022-03-18 00:36:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:13,411 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-03-18 00:36:13,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.9315068493150684) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:13,412 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-03-18 00:36:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-18 00:36:13,412 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:13,412 INFO L500 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:13,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:13,629 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,SelfDestructingSolverStorable67 [2022-03-18 00:36:13,629 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:13,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1467340412, now seen corresponding path program 135 times [2022-03-18 00:36:13,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:13,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677382305] [2022-03-18 00:36:14,174 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:14,175 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1467340412, now seen corresponding path program 136 times [2022-03-18 00:36:14,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:14,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185597500] [2022-03-18 00:36:14,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:14,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:15,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:15,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:15,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185597500] [2022-03-18 00:36:15,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185597500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:15,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616404353] [2022-03-18 00:36:15,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:36:15,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:15,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:15,674 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) [2022-03-18 00:36:15,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 00:36:15,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:36:15,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:15,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-18 00:36:15,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:16,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616404353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:19,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:19,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-18 00:36:19,786 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:19,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677382305] [2022-03-18 00:36:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677382305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:19,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:19,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 00:36:19,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848015106] [2022-03-18 00:36:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:19,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 00:36:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:19,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 00:36:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9882, Invalid=11288, Unknown=0, NotChecked=0, Total=21170 [2022-03-18 00:36:19,788 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand has 74 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:21,881 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-03-18 00:36:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 00:36:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 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 [2022-03-18 00:36:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:21,882 INFO L225 Difference]: With dead ends: 156 [2022-03-18 00:36:21,882 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 00:36:21,884 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=19622, Invalid=27250, Unknown=0, NotChecked=0, Total=46872 [2022-03-18 00:36:21,884 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 148 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:21,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 33 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:21,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 00:36:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-18 00:36:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.006896551724138) internal successors, (146), 145 states have internal predecessors, (146), 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) [2022-03-18 00:36:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2022-03-18 00:36:21,917 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2022-03-18 00:36:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:21,917 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2022-03-18 00:36:21,917 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9324324324324325) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2022-03-18 00:36:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 00:36:21,918 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:21,918 INFO L500 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:21,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:22,134 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,SelfDestructingSolverStorable68 [2022-03-18 00:36:22,135 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:22,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:22,135 INFO L85 PathProgramCache]: Analyzing trace with hash -264714432, now seen corresponding path program 137 times [2022-03-18 00:36:22,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:22,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222894322] [2022-03-18 00:36:22,555 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:22,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash -264714432, now seen corresponding path program 138 times [2022-03-18 00:36:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:22,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138418000] [2022-03-18 00:36:22,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:22,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:24,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138418000] [2022-03-18 00:36:24,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138418000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314173240] [2022-03-18 00:36:24,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:36:24,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:24,535 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) [2022-03-18 00:36:24,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 00:36:24,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-18 00:36:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 00:36:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:25,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:29,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:29,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314173240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:29,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:29,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-18 00:36:29,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [222894322] [2022-03-18 00:36:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [222894322] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:29,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:29,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 00:36:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807606413] [2022-03-18 00:36:29,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:29,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 00:36:29,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:29,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 00:36:29,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10165, Invalid=11591, Unknown=0, NotChecked=0, Total=21756 [2022-03-18 00:36:29,819 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand has 75 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:32,512 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-03-18 00:36:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-18 00:36:32,513 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-18 00:36:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:32,513 INFO L225 Difference]: With dead ends: 158 [2022-03-18 00:36:32,513 INFO L226 Difference]: Without dead ends: 153 [2022-03-18 00:36:32,516 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=20186, Invalid=27994, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 00:36:32,516 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 150 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:32,516 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 58 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-18 00:36:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-03-18 00:36:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 147 states have internal predecessors, (148), 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) [2022-03-18 00:36:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2022-03-18 00:36:32,604 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2022-03-18 00:36:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:32,604 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2022-03-18 00:36:32,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2022-03-18 00:36:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-18 00:36:32,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:32,606 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:32,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:32,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:32,827 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 112649724, now seen corresponding path program 139 times [2022-03-18 00:36:32,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:32,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1544316118] [2022-03-18 00:36:33,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:33,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash 112649724, now seen corresponding path program 140 times [2022-03-18 00:36:33,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:33,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002988393] [2022-03-18 00:36:33,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:33,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:34,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:34,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002988393] [2022-03-18 00:36:34,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002988393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:34,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622219710] [2022-03-18 00:36:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:36:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:34,664 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) [2022-03-18 00:36:34,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 00:36:34,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:36:34,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:34,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-18 00:36:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:35,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622219710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:40,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-18 00:36:40,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1544316118] [2022-03-18 00:36:40,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1544316118] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:40,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:40,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 00:36:40,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15007495] [2022-03-18 00:36:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:40,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 00:36:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 00:36:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10452, Invalid=11898, Unknown=0, NotChecked=0, Total=22350 [2022-03-18 00:36:40,124 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand has 76 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:41,960 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-18 00:36:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 00:36:41,960 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 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 [2022-03-18 00:36:41,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:41,961 INFO L225 Difference]: With dead ends: 160 [2022-03-18 00:36:41,961 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 00:36:41,964 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=20758, Invalid=28748, Unknown=0, NotChecked=0, Total=49506 [2022-03-18 00:36:41,964 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:41,964 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 43 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 00:36:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-18 00:36:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 149 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-18 00:36:42,024 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2022-03-18 00:36:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:42,025 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-18 00:36:42,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9342105263157894) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-18 00:36:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-18 00:36:42,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:42,026 INFO L500 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:42,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:42,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:42,239 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1982350776, now seen corresponding path program 141 times [2022-03-18 00:36:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1789124181] [2022-03-18 00:36:42,643 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:42,643 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1982350776, now seen corresponding path program 142 times [2022-03-18 00:36:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773987566] [2022-03-18 00:36:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:42,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773987566] [2022-03-18 00:36:44,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773987566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597572503] [2022-03-18 00:36:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:36:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:44,023 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) [2022-03-18 00:36:44,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 00:36:44,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:36:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 00:36:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:44,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:49,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597572503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:49,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:49,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-18 00:36:49,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:49,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1789124181] [2022-03-18 00:36:49,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1789124181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:49,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:49,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 00:36:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548572062] [2022-03-18 00:36:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:49,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 00:36:49,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 00:36:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10743, Invalid=12209, Unknown=0, NotChecked=0, Total=22952 [2022-03-18 00:36:49,305 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand has 77 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:51,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:51,343 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-03-18 00:36:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-18 00:36:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 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 [2022-03-18 00:36:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:51,344 INFO L225 Difference]: With dead ends: 162 [2022-03-18 00:36:51,344 INFO L226 Difference]: Without dead ends: 157 [2022-03-18 00:36:51,346 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=21338, Invalid=29512, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 00:36:51,347 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 154 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:51,347 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 43 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-18 00:36:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-03-18 00:36:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 151 states have internal predecessors, (152), 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) [2022-03-18 00:36:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2022-03-18 00:36:51,389 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2022-03-18 00:36:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:51,389 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2022-03-18 00:36:51,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.9350649350649352) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:36:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2022-03-18 00:36:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 00:36:51,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:51,390 INFO L500 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:51,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-18 00:36:51,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:51,597 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:51,597 INFO L85 PathProgramCache]: Analyzing trace with hash -826235276, now seen corresponding path program 143 times [2022-03-18 00:36:51,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:51,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1133803726] [2022-03-18 00:36:51,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:36:51,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash -826235276, now seen corresponding path program 144 times [2022-03-18 00:36:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:51,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355723747] [2022-03-18 00:36:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:53,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:53,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355723747] [2022-03-18 00:36:53,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355723747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434298419] [2022-03-18 00:36:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:36:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:53,855 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) [2022-03-18 00:36:53,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 00:36:54,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-03-18 00:36:54,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 00:36:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:54,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:36:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434298419] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:58,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:58,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-18 00:36:58,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:58,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1133803726] [2022-03-18 00:36:58,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1133803726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:58,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:58,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 00:36:58,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877404908] [2022-03-18 00:36:58,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:58,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 00:36:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:58,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 00:36:58,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11038, Invalid=12524, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 00:36:58,083 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand has 78 states, 78 states have (on average 1.935897435897436) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:00,180 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-03-18 00:37:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 00:37:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.935897435897436) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-18 00:37:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:00,181 INFO L225 Difference]: With dead ends: 164 [2022-03-18 00:37:00,181 INFO L226 Difference]: Without dead ends: 159 [2022-03-18 00:37:00,185 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=21926, Invalid=30286, Unknown=0, NotChecked=0, Total=52212 [2022-03-18 00:37:00,185 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 156 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:00,185 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 48 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:00,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-18 00:37:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-18 00:37:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 153 states have internal predecessors, (154), 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) [2022-03-18 00:37:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-03-18 00:37:00,225 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2022-03-18 00:37:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:00,225 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-03-18 00:37:00,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.935897435897436) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-03-18 00:37:00,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-18 00:37:00,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:00,226 INFO L500 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:00,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:00,443 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,SelfDestructingSolverStorable72 [2022-03-18 00:37:00,443 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1656997936, now seen corresponding path program 145 times [2022-03-18 00:37:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [233957773] [2022-03-18 00:37:01,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:01,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:01,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1656997936, now seen corresponding path program 146 times [2022-03-18 00:37:01,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:01,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866578084] [2022-03-18 00:37:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:01,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:02,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866578084] [2022-03-18 00:37:02,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866578084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:02,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863735544] [2022-03-18 00:37:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:37:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:02,341 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) [2022-03-18 00:37:02,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 00:37:02,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:37:02,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 00:37:02,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:02,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:06,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:06,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863735544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:06,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:06,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-18 00:37:06,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:06,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [233957773] [2022-03-18 00:37:06,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [233957773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:06,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:06,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 00:37:06,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102615116] [2022-03-18 00:37:06,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:06,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 00:37:06,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 00:37:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11337, Invalid=12843, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 00:37:06,845 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:09,318 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-03-18 00:37:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-18 00:37:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 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 [2022-03-18 00:37:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:09,319 INFO L225 Difference]: With dead ends: 166 [2022-03-18 00:37:09,319 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 00:37:09,322 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=22522, Invalid=31070, Unknown=0, NotChecked=0, Total=53592 [2022-03-18 00:37:09,324 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 158 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:09,324 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 48 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 00:37:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-18 00:37:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 155 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2022-03-18 00:37:09,365 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2022-03-18 00:37:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:09,365 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2022-03-18 00:37:09,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.9367088607594938) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2022-03-18 00:37:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-18 00:37:09,365 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:09,366 INFO L500 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:09,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:09,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:09,583 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:09,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash 42298092, now seen corresponding path program 147 times [2022-03-18 00:37:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:09,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1667883414] [2022-03-18 00:37:10,456 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:10,456 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 42298092, now seen corresponding path program 148 times [2022-03-18 00:37:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913542384] [2022-03-18 00:37:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913542384] [2022-03-18 00:37:11,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913542384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:11,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083141554] [2022-03-18 00:37:11,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:37:11,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:11,959 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) [2022-03-18 00:37:11,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 00:37:12,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:37:12,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-18 00:37:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:12,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:17,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083141554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:17,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:17,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-18 00:37:17,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:17,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1667883414] [2022-03-18 00:37:17,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1667883414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:17,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:17,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 00:37:17,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851551285] [2022-03-18 00:37:17,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:17,503 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 00:37:17,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 00:37:17,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11640, Invalid=13166, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 00:37:17,505 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand has 80 states, 80 states have (on average 1.9375) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:19,453 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-03-18 00:37:19,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 00:37:19,453 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9375) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 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 [2022-03-18 00:37:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:19,454 INFO L225 Difference]: With dead ends: 168 [2022-03-18 00:37:19,454 INFO L226 Difference]: Without dead ends: 163 [2022-03-18 00:37:19,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=23126, Invalid=31864, Unknown=0, NotChecked=0, Total=54990 [2022-03-18 00:37:19,457 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 160 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:19,457 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 48 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-18 00:37:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-18 00:37:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 157 states have internal predecessors, (158), 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) [2022-03-18 00:37:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2022-03-18 00:37:19,521 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2022-03-18 00:37:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:19,522 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2022-03-18 00:37:19,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9375) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2022-03-18 00:37:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-18 00:37:19,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:19,522 INFO L500 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:19,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:19,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:19,739 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1201058136, now seen corresponding path program 149 times [2022-03-18 00:37:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2129735974] [2022-03-18 00:37:20,082 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:20,082 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1201058136, now seen corresponding path program 150 times [2022-03-18 00:37:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:20,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370678562] [2022-03-18 00:37:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:21,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:21,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370678562] [2022-03-18 00:37:21,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370678562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:21,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53210036] [2022-03-18 00:37:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:37:21,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:21,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:21,344 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) [2022-03-18 00:37:21,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 00:37:21,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-18 00:37:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:21,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 00:37:21,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:27,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53210036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:27,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:27,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-18 00:37:27,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2129735974] [2022-03-18 00:37:27,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2129735974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:27,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:27,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 00:37:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10184580] [2022-03-18 00:37:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:27,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 00:37:27,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 00:37:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11947, Invalid=13493, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 00:37:27,085 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:29,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:29,055 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-18 00:37:29,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-18 00:37:29,055 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-18 00:37:29,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:29,056 INFO L225 Difference]: With dead ends: 170 [2022-03-18 00:37:29,056 INFO L226 Difference]: Without dead ends: 165 [2022-03-18 00:37:29,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=23738, Invalid=32668, Unknown=0, NotChecked=0, Total=56406 [2022-03-18 00:37:29,059 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 162 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:29,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 53 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:29,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-18 00:37:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-03-18 00:37:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 159 states have internal predecessors, (160), 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) [2022-03-18 00:37:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-18 00:37:29,140 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2022-03-18 00:37:29,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:29,140 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-18 00:37:29,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:29,140 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-18 00:37:29,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 00:37:29,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:29,141 INFO L500 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:29,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:29,362 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,SelfDestructingSolverStorable75 [2022-03-18 00:37:29,362 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:29,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2065484956, now seen corresponding path program 151 times [2022-03-18 00:37:29,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:29,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865983378] [2022-03-18 00:37:29,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:29,734 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2065484956, now seen corresponding path program 152 times [2022-03-18 00:37:29,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:29,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429259278] [2022-03-18 00:37:29,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:31,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:31,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:31,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429259278] [2022-03-18 00:37:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429259278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:31,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726476440] [2022-03-18 00:37:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:37:31,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:31,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:31,091 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) [2022-03-18 00:37:31,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 00:37:31,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:37:31,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 00:37:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:31,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:36,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726476440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:36,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:36,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-18 00:37:36,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:36,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865983378] [2022-03-18 00:37:36,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865983378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:36,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:36,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 00:37:36,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623786354] [2022-03-18 00:37:36,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:36,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 00:37:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 00:37:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12258, Invalid=13824, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 00:37:36,252 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand has 82 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:38,574 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-03-18 00:37:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 00:37:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 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 [2022-03-18 00:37:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:38,575 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:37:38,575 INFO L226 Difference]: Without dead ends: 167 [2022-03-18 00:37:38,579 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=24358, Invalid=33482, Unknown=0, NotChecked=0, Total=57840 [2022-03-18 00:37:38,580 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 164 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:38,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 63 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-18 00:37:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-18 00:37:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0062111801242235) internal successors, (162), 161 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:38,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-03-18 00:37:38,647 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2022-03-18 00:37:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:38,647 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-03-18 00:37:38,647 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9390243902439024) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:38,648 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-03-18 00:37:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-18 00:37:38,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:38,648 INFO L500 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:38,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:38,876 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,SelfDestructingSolverStorable76 [2022-03-18 00:37:38,877 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 443996448, now seen corresponding path program 153 times [2022-03-18 00:37:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:38,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [526989078] [2022-03-18 00:37:39,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:39,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:39,836 INFO L85 PathProgramCache]: Analyzing trace with hash 443996448, now seen corresponding path program 154 times [2022-03-18 00:37:39,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:39,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113569791] [2022-03-18 00:37:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:41,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113569791] [2022-03-18 00:37:41,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113569791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:41,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465873641] [2022-03-18 00:37:41,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:37:41,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:41,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:41,961 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) [2022-03-18 00:37:41,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 00:37:42,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:37:42,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:42,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 00:37:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:47,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465873641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:47,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:47,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-18 00:37:47,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:47,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [526989078] [2022-03-18 00:37:47,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [526989078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:47,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:47,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 00:37:47,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337287192] [2022-03-18 00:37:47,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:47,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 00:37:47,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:47,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 00:37:47,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12573, Invalid=14159, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 00:37:47,064 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand has 83 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:49,418 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-03-18 00:37:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-18 00:37:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 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 [2022-03-18 00:37:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:49,420 INFO L225 Difference]: With dead ends: 174 [2022-03-18 00:37:49,420 INFO L226 Difference]: Without dead ends: 169 [2022-03-18 00:37:49,424 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=24986, Invalid=34306, Unknown=0, NotChecked=0, Total=59292 [2022-03-18 00:37:49,424 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 166 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:49,425 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 48 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:37:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-18 00:37:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-18 00:37:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0061349693251533) internal successors, (164), 163 states have internal predecessors, (164), 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) [2022-03-18 00:37:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-03-18 00:37:49,498 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2022-03-18 00:37:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:49,499 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-03-18 00:37:49,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.9397590361445782) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:37:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-03-18 00:37:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 00:37:49,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:49,500 INFO L500 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:49,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:49,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:49,716 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:49,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:49,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1715994660, now seen corresponding path program 155 times [2022-03-18 00:37:49,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:49,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218629415] [2022-03-18 00:37:51,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:37:51,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1715994660, now seen corresponding path program 156 times [2022-03-18 00:37:51,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:51,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22612386] [2022-03-18 00:37:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:51,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:53,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22612386] [2022-03-18 00:37:53,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22612386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:53,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005425546] [2022-03-18 00:37:53,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:37:53,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:53,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:53,211 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) [2022-03-18 00:37:53,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 00:37:53,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-18 00:37:53,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:53,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-18 00:37:53,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:53,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:37:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005425546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:59,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:59,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-18 00:37:59,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:59,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218629415] [2022-03-18 00:37:59,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218629415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:59,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:59,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 00:37:59,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811389025] [2022-03-18 00:37:59,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:59,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 00:37:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:59,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 00:37:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12892, Invalid=14498, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 00:37:59,190 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:38:01,692 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-03-18 00:38:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 00:38:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-18 00:38:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:38:01,693 INFO L225 Difference]: With dead ends: 176 [2022-03-18 00:38:01,693 INFO L226 Difference]: Without dead ends: 171 [2022-03-18 00:38:01,695 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=25622, Invalid=35140, Unknown=0, NotChecked=0, Total=60762 [2022-03-18 00:38:01,695 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 168 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:38:01,696 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 33 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:38:01,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-18 00:38:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-18 00:38:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.006060606060606) internal successors, (166), 165 states have internal predecessors, (166), 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) [2022-03-18 00:38:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2022-03-18 00:38:01,740 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2022-03-18 00:38:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:38:01,740 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2022-03-18 00:38:01,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9404761904761905) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:01,740 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2022-03-18 00:38:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-18 00:38:01,741 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:38:01,741 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:38:01,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 00:38:01,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:01,959 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:38:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:38:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1296721816, now seen corresponding path program 157 times [2022-03-18 00:38:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:01,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049271356] [2022-03-18 00:38:02,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:38:02,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:38:02,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1296721816, now seen corresponding path program 158 times [2022-03-18 00:38:02,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:38:02,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653225106] [2022-03-18 00:38:02,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:38:02,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:38:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:04,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:38:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:04,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:38:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653225106] [2022-03-18 00:38:04,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653225106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:38:04,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26596206] [2022-03-18 00:38:04,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:38:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:04,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:38:04,428 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) [2022-03-18 00:38:04,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 00:38:04,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:38:04,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:38:04,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 00:38:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:38:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:04,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:38:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:10,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26596206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:38:10,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:38:10,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-18 00:38:10,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:38:10,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049271356] [2022-03-18 00:38:10,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049271356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:38:10,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:38:10,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 00:38:10,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453801990] [2022-03-18 00:38:10,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:38:10,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 00:38:10,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:10,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 00:38:10,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13215, Invalid=14841, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 00:38:10,634 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:38:13,250 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-03-18 00:38:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-18 00:38:13,250 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 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 [2022-03-18 00:38:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:38:13,251 INFO L225 Difference]: With dead ends: 178 [2022-03-18 00:38:13,251 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 00:38:13,254 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=26266, Invalid=35984, Unknown=0, NotChecked=0, Total=62250 [2022-03-18 00:38:13,267 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:38:13,267 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 53 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:38:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 00:38:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-18 00:38:13,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0059880239520957) internal successors, (168), 167 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2022-03-18 00:38:13,331 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2022-03-18 00:38:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:38:13,331 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2022-03-18 00:38:13,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.9411764705882353) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2022-03-18 00:38:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-18 00:38:13,332 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:38:13,332 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:38:13,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-18 00:38:13,547 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,SelfDestructingSolverStorable79 [2022-03-18 00:38:13,548 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:38:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:38:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1709297748, now seen corresponding path program 159 times [2022-03-18 00:38:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247894123] [2022-03-18 00:38:14,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:38:14,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:38:14,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1709297748, now seen corresponding path program 160 times [2022-03-18 00:38:14,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:38:14,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132162114] [2022-03-18 00:38:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:38:14,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:38:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:16,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:38:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:38:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132162114] [2022-03-18 00:38:16,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132162114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:38:16,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339090149] [2022-03-18 00:38:16,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:38:16,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:16,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:38:16,256 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) [2022-03-18 00:38:16,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 00:38:16,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:38:16,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:38:16,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 00:38:16,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:38:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:16,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:38:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339090149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:38:22,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:38:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-18 00:38:22,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:38:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247894123] [2022-03-18 00:38:22,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247894123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:38:22,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:38:22,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 00:38:22,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557506788] [2022-03-18 00:38:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:38:22,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 00:38:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 00:38:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13542, Invalid=15188, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 00:38:22,267 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand has 86 states, 86 states have (on average 1.941860465116279) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:38:25,089 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-03-18 00:38:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 00:38:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.941860465116279) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 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 [2022-03-18 00:38:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:38:25,090 INFO L225 Difference]: With dead ends: 180 [2022-03-18 00:38:25,090 INFO L226 Difference]: Without dead ends: 175 [2022-03-18 00:38:25,094 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4776 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=26918, Invalid=36838, Unknown=0, NotChecked=0, Total=63756 [2022-03-18 00:38:25,095 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 172 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:38:25,095 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 33 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:38:25,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-18 00:38:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-18 00:38:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0059171597633136) internal successors, (170), 169 states have internal predecessors, (170), 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) [2022-03-18 00:38:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-03-18 00:38:25,173 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2022-03-18 00:38:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:38:25,173 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-03-18 00:38:25,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.941860465116279) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-03-18 00:38:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 00:38:25,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:38:25,191 INFO L500 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:38:25,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-18 00:38:25,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:25,407 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:38:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:38:25,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1237190128, now seen corresponding path program 161 times [2022-03-18 00:38:25,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:25,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971082420] [2022-03-18 00:38:25,797 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:38:25,797 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:38:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1237190128, now seen corresponding path program 162 times [2022-03-18 00:38:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:38:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184556264] [2022-03-18 00:38:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:38:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:38:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:38:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:27,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:38:27,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184556264] [2022-03-18 00:38:27,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184556264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:38:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230409544] [2022-03-18 00:38:27,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:38:27,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:27,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:38:27,550 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) [2022-03-18 00:38:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 00:38:27,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-03-18 00:38:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:38:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 00:38:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:38:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:28,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:38:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:33,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230409544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:38:33,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:38:33,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-18 00:38:33,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:38:33,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971082420] [2022-03-18 00:38:33,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971082420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:38:33,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:38:33,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 00:38:33,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566475194] [2022-03-18 00:38:33,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:38:33,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 00:38:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 00:38:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13873, Invalid=15539, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 00:38:33,375 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand has 87 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:38:37,110 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-03-18 00:38:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-18 00:38:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-18 00:38:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:38:37,111 INFO L225 Difference]: With dead ends: 182 [2022-03-18 00:38:37,111 INFO L226 Difference]: Without dead ends: 177 [2022-03-18 00:38:37,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=27578, Invalid=37702, Unknown=0, NotChecked=0, Total=65280 [2022-03-18 00:38:37,115 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:38:37,115 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 43 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:38:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-18 00:38:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-03-18 00:38:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0058479532163742) internal successors, (172), 171 states have internal predecessors, (172), 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) [2022-03-18 00:38:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2022-03-18 00:38:37,167 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2022-03-18 00:38:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:38:37,168 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2022-03-18 00:38:37,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9425287356321839) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2022-03-18 00:38:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-18 00:38:37,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:38:37,168 INFO L500 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:38:37,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 00:38:37,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:37,387 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:38:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:38:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1866376396, now seen corresponding path program 163 times [2022-03-18 00:38:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:37,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1452509241] [2022-03-18 00:38:37,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:38:37,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:38:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1866376396, now seen corresponding path program 164 times [2022-03-18 00:38:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:38:37,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156686144] [2022-03-18 00:38:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:38:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:38:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:40,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:38:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:38:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156686144] [2022-03-18 00:38:40,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156686144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:38:40,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800837812] [2022-03-18 00:38:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:38:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:38:40,289 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) [2022-03-18 00:38:40,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 00:38:40,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:38:40,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:38:40,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-18 00:38:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:38:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:40,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:38:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:48,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800837812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:38:48,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:38:48,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-18 00:38:48,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:38:48,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1452509241] [2022-03-18 00:38:48,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1452509241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:38:48,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:38:48,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 00:38:48,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107340617] [2022-03-18 00:38:48,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:38:48,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 00:38:48,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 00:38:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14208, Invalid=15894, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 00:38:48,065 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:38:50,853 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-03-18 00:38:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 00:38:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 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 [2022-03-18 00:38:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:38:50,854 INFO L225 Difference]: With dead ends: 184 [2022-03-18 00:38:50,854 INFO L226 Difference]: Without dead ends: 179 [2022-03-18 00:38:50,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=28246, Invalid=38576, Unknown=0, NotChecked=0, Total=66822 [2022-03-18 00:38:50,857 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 176 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:38:50,857 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 48 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:38:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-18 00:38:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-18 00:38:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0057803468208093) internal successors, (174), 173 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2022-03-18 00:38:50,929 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2022-03-18 00:38:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:38:50,929 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2022-03-18 00:38:50,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9431818181818181) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:38:50,929 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2022-03-18 00:38:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-18 00:38:50,930 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:38:50,930 INFO L500 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:38:50,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 00:38:51,133 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,SelfDestructingSolverStorable82 [2022-03-18 00:38:51,133 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:38:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:38:51,133 INFO L85 PathProgramCache]: Analyzing trace with hash -608464760, now seen corresponding path program 165 times [2022-03-18 00:38:51,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:38:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847247069] [2022-03-18 00:38:51,631 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:38:51,631 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:38:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -608464760, now seen corresponding path program 166 times [2022-03-18 00:38:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:38:51,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632170613] [2022-03-18 00:38:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:38:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:38:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:38:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:38:53,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:53,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:38:53,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632170613] [2022-03-18 00:38:53,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632170613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:38:53,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480661557] [2022-03-18 00:38:53,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:38:53,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:38:53,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:38:53,840 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) [2022-03-18 00:38:53,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 00:38:53,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:38:53,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:38:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 00:38:53,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:38:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:38:54,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:02,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480661557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:02,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:02,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-18 00:39:02,166 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:02,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847247069] [2022-03-18 00:39:02,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847247069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:02,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:02,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 00:39:02,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537703840] [2022-03-18 00:39:02,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:02,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 00:39:02,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 00:39:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14547, Invalid=16253, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 00:39:02,169 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:04,980 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2022-03-18 00:39:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-18 00:39:04,980 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 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 [2022-03-18 00:39:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:04,981 INFO L225 Difference]: With dead ends: 186 [2022-03-18 00:39:04,981 INFO L226 Difference]: Without dead ends: 181 [2022-03-18 00:39:04,985 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=28922, Invalid=39460, Unknown=0, NotChecked=0, Total=68382 [2022-03-18 00:39:04,986 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 178 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:04,986 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 48 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:39:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-18 00:39:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-18 00:39:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0057142857142858) internal successors, (176), 175 states have internal predecessors, (176), 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) [2022-03-18 00:39:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2022-03-18 00:39:05,060 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2022-03-18 00:39:05,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:05,060 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2022-03-18 00:39:05,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:05,060 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2022-03-18 00:39:05,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-18 00:39:05,061 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:05,061 INFO L500 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:05,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-18 00:39:05,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:05,264 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:05,264 INFO L85 PathProgramCache]: Analyzing trace with hash 481066308, now seen corresponding path program 167 times [2022-03-18 00:39:05,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:05,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390573954] [2022-03-18 00:39:05,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:39:05,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:39:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash 481066308, now seen corresponding path program 168 times [2022-03-18 00:39:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:05,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593457513] [2022-03-18 00:39:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:05,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:08,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:08,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593457513] [2022-03-18 00:39:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593457513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172854396] [2022-03-18 00:39:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:39:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:08,177 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) [2022-03-18 00:39:08,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 00:39:08,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-03-18 00:39:08,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 00:39:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:08,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172854396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:14,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:14,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-18 00:39:14,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:14,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390573954] [2022-03-18 00:39:14,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390573954] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:14,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:14,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 00:39:14,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241161747] [2022-03-18 00:39:14,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:14,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 00:39:14,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 00:39:14,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14890, Invalid=16616, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 00:39:14,546 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand has 90 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:17,050 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2022-03-18 00:39:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 00:39:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-18 00:39:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:17,051 INFO L225 Difference]: With dead ends: 188 [2022-03-18 00:39:17,051 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 00:39:17,054 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=29606, Invalid=40354, Unknown=0, NotChecked=0, Total=69960 [2022-03-18 00:39:17,054 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 180 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:17,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 48 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 00:39:17,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-03-18 00:39:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0056497175141244) internal successors, (178), 177 states have internal predecessors, (178), 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) [2022-03-18 00:39:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2022-03-18 00:39:17,105 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2022-03-18 00:39:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:17,105 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2022-03-18 00:39:17,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9444444444444444) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2022-03-18 00:39:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-18 00:39:17,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:17,107 INFO L500 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:17,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-18 00:39:17,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:17,325 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash -451597568, now seen corresponding path program 169 times [2022-03-18 00:39:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:17,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113052737] [2022-03-18 00:39:18,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:39:18,312 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:39:18,312 INFO L85 PathProgramCache]: Analyzing trace with hash -451597568, now seen corresponding path program 170 times [2022-03-18 00:39:18,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:18,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511569128] [2022-03-18 00:39:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:18,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:21,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:21,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:21,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511569128] [2022-03-18 00:39:21,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511569128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:21,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479738782] [2022-03-18 00:39:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:39:21,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:21,096 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) [2022-03-18 00:39:21,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 00:39:21,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:39:21,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 00:39:21,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:21,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:27,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479738782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:27,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:27,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-18 00:39:27,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113052737] [2022-03-18 00:39:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113052737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:27,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:27,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 00:39:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59293421] [2022-03-18 00:39:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:27,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 00:39:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 00:39:27,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15237, Invalid=16983, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 00:39:27,558 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand has 91 states, 91 states have (on average 1.945054945054945) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:30,364 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-03-18 00:39:30,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-18 00:39:30,364 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.945054945054945) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 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 [2022-03-18 00:39:30,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:30,365 INFO L225 Difference]: With dead ends: 190 [2022-03-18 00:39:30,365 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 00:39:30,368 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=30298, Invalid=41258, Unknown=0, NotChecked=0, Total=71556 [2022-03-18 00:39:30,368 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:30,368 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 48 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 00:39:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-18 00:39:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.005586592178771) internal successors, (180), 179 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-03-18 00:39:30,421 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2022-03-18 00:39:30,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:30,421 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-03-18 00:39:30,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.945054945054945) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:30,421 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-03-18 00:39:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-18 00:39:30,421 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:30,422 INFO L500 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:30,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-18 00:39:30,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:30,640 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:30,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:30,640 INFO L85 PathProgramCache]: Analyzing trace with hash 906582460, now seen corresponding path program 171 times [2022-03-18 00:39:30,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:30,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1659718141] [2022-03-18 00:39:31,199 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:39:31,199 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:39:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 906582460, now seen corresponding path program 172 times [2022-03-18 00:39:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793601395] [2022-03-18 00:39:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:33,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793601395] [2022-03-18 00:39:33,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793601395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598590954] [2022-03-18 00:39:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:39:33,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:33,085 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) [2022-03-18 00:39:33,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 00:39:33,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:39:33,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:33,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 00:39:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:38,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598590954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:38,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:38,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-18 00:39:38,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1659718141] [2022-03-18 00:39:38,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1659718141] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:38,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:38,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 00:39:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176191421] [2022-03-18 00:39:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:38,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 00:39:38,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:38,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 00:39:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15588, Invalid=17354, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 00:39:38,469 INFO L87 Difference]: Start difference. First operand 184 states and 184 transitions. Second operand has 92 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:41,107 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-03-18 00:39:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 00:39:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 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 [2022-03-18 00:39:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:41,109 INFO L225 Difference]: With dead ends: 192 [2022-03-18 00:39:41,109 INFO L226 Difference]: Without dead ends: 187 [2022-03-18 00:39:41,112 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=30998, Invalid=42172, Unknown=0, NotChecked=0, Total=73170 [2022-03-18 00:39:41,112 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 184 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:41,112 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 48 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:39:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-18 00:39:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-03-18 00:39:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0055248618784531) internal successors, (182), 181 states have internal predecessors, (182), 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) [2022-03-18 00:39:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2022-03-18 00:39:41,206 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2022-03-18 00:39:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:41,206 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2022-03-18 00:39:41,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2022-03-18 00:39:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 00:39:41,211 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:41,211 INFO L500 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:41,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 00:39:41,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:41,424 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:41,424 INFO L85 PathProgramCache]: Analyzing trace with hash 447531384, now seen corresponding path program 173 times [2022-03-18 00:39:41,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:41,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485692819] [2022-03-18 00:39:41,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:39:41,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:39:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 447531384, now seen corresponding path program 174 times [2022-03-18 00:39:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000652171] [2022-03-18 00:39:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:44,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000652171] [2022-03-18 00:39:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000652171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100540974] [2022-03-18 00:39:44,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:39:44,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:44,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:44,168 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) [2022-03-18 00:39:44,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 00:39:44,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-18 00:39:44,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 00:39:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:44,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:39:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:50,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100540974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:39:50,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:39:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-18 00:39:50,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:39:50,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485692819] [2022-03-18 00:39:50,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485692819] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:39:50,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:39:50,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 00:39:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825986704] [2022-03-18 00:39:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:39:50,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 00:39:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 00:39:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15943, Invalid=17729, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 00:39:50,043 INFO L87 Difference]: Start difference. First operand 186 states and 186 transitions. Second operand has 93 states, 93 states have (on average 1.946236559139785) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:39:52,809 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2022-03-18 00:39:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-18 00:39:52,809 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.946236559139785) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-18 00:39:52,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:39:52,810 INFO L225 Difference]: With dead ends: 194 [2022-03-18 00:39:52,810 INFO L226 Difference]: Without dead ends: 189 [2022-03-18 00:39:52,813 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=31706, Invalid=43096, Unknown=0, NotChecked=0, Total=74802 [2022-03-18 00:39:52,813 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 186 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:39:52,813 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 73 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:39:52,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-18 00:39:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-18 00:39:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.005464480874317) internal successors, (184), 183 states have internal predecessors, (184), 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) [2022-03-18 00:39:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2022-03-18 00:39:52,871 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2022-03-18 00:39:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:39:52,871 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2022-03-18 00:39:52,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.946236559139785) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:39:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2022-03-18 00:39:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-18 00:39:52,888 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:39:52,888 INFO L500 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:39:52,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 00:39:53,105 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:53,105 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:39:53,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:39:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1681078836, now seen corresponding path program 175 times [2022-03-18 00:39:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:39:53,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742321802] [2022-03-18 00:39:53,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:39:53,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:39:53,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1681078836, now seen corresponding path program 176 times [2022-03-18 00:39:53,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:39:53,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732797705] [2022-03-18 00:39:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:39:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:39:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:55,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:39:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:39:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:55,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:39:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732797705] [2022-03-18 00:39:55,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732797705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:39:55,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325233267] [2022-03-18 00:39:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:39:55,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:39:55,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:39:55,830 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) [2022-03-18 00:39:55,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 00:39:55,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:39:55,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:39:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-18 00:39:55,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:39:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:39:56,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:01,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325233267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:01,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-18 00:40:01,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:01,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742321802] [2022-03-18 00:40:01,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742321802] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:01,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:01,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 00:40:01,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434245739] [2022-03-18 00:40:01,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:01,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 00:40:01,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:01,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 00:40:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16302, Invalid=18108, Unknown=0, NotChecked=0, Total=34410 [2022-03-18 00:40:01,307 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand has 94 states, 94 states have (on average 1.946808510638298) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:04,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:04,175 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2022-03-18 00:40:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 00:40:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.946808510638298) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 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 [2022-03-18 00:40:04,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:04,176 INFO L225 Difference]: With dead ends: 196 [2022-03-18 00:40:04,176 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 00:40:04,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=32422, Invalid=44030, Unknown=0, NotChecked=0, Total=76452 [2022-03-18 00:40:04,181 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 188 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:04,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 38 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:40:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 00:40:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-18 00:40:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0054054054054054) internal successors, (186), 185 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2022-03-18 00:40:04,271 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2022-03-18 00:40:04,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:04,271 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2022-03-18 00:40:04,272 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.946808510638298) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:04,272 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2022-03-18 00:40:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-18 00:40:04,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:04,273 INFO L500 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:04,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-18 00:40:04,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-18 00:40:04,499 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:04,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1709206512, now seen corresponding path program 177 times [2022-03-18 00:40:04,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:04,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583185242] [2022-03-18 00:40:06,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:40:06,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:40:06,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1709206512, now seen corresponding path program 178 times [2022-03-18 00:40:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:06,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359643445] [2022-03-18 00:40:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359643445] [2022-03-18 00:40:08,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359643445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:08,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765463973] [2022-03-18 00:40:08,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:40:08,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:08,213 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) [2022-03-18 00:40:08,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 00:40:08,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:40:08,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 00:40:08,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:08,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:14,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765463973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:14,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:14,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-18 00:40:14,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583185242] [2022-03-18 00:40:14,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583185242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:14,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:14,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 00:40:14,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706622652] [2022-03-18 00:40:14,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:14,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 00:40:14,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 00:40:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16665, Invalid=18491, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 00:40:14,814 INFO L87 Difference]: Start difference. First operand 190 states and 190 transitions. Second operand has 95 states, 95 states have (on average 1.9473684210526316) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:17,319 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2022-03-18 00:40:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-18 00:40:17,319 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.9473684210526316) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 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 [2022-03-18 00:40:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:17,319 INFO L225 Difference]: With dead ends: 198 [2022-03-18 00:40:17,319 INFO L226 Difference]: Without dead ends: 193 [2022-03-18 00:40:17,323 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=33146, Invalid=44974, Unknown=0, NotChecked=0, Total=78120 [2022-03-18 00:40:17,323 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:17,323 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 43 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:40:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-18 00:40:17,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-18 00:40:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 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) [2022-03-18 00:40:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2022-03-18 00:40:17,393 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2022-03-18 00:40:17,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:17,393 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2022-03-18 00:40:17,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.9473684210526316) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2022-03-18 00:40:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 00:40:17,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:17,395 INFO L500 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:17,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-18 00:40:17,613 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,SelfDestructingSolverStorable89 [2022-03-18 00:40:17,613 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:17,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1324867924, now seen corresponding path program 179 times [2022-03-18 00:40:17,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:17,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971651484] [2022-03-18 00:40:18,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:40:18,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:40:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1324867924, now seen corresponding path program 180 times [2022-03-18 00:40:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304669679] [2022-03-18 00:40:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:20,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:20,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304669679] [2022-03-18 00:40:20,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304669679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:20,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862874588] [2022-03-18 00:40:20,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:40:20,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:20,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:20,355 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) [2022-03-18 00:40:20,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 00:40:20,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-18 00:40:20,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-18 00:40:20,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:20,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:28,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862874588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:28,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:28,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-18 00:40:28,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:28,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971651484] [2022-03-18 00:40:28,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971651484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:28,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:28,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 00:40:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772010764] [2022-03-18 00:40:28,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:28,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 00:40:28,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 00:40:28,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17032, Invalid=18878, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 00:40:28,064 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 96 states, 96 states have (on average 1.9479166666666667) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:30,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:30,653 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-18 00:40:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 00:40:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.9479166666666667) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-18 00:40:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:30,654 INFO L225 Difference]: With dead ends: 200 [2022-03-18 00:40:30,654 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 00:40:30,657 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=33878, Invalid=45928, Unknown=0, NotChecked=0, Total=79806 [2022-03-18 00:40:30,657 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:30,657 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 43 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:40:30,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 00:40:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-18 00:40:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0052910052910053) internal successors, (190), 189 states have internal predecessors, (190), 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) [2022-03-18 00:40:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-03-18 00:40:30,724 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2022-03-18 00:40:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:30,725 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-03-18 00:40:30,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.9479166666666667) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-03-18 00:40:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-18 00:40:30,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:30,725 INFO L500 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:30,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-18 00:40:30,942 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:30,942 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:30,943 INFO L85 PathProgramCache]: Analyzing trace with hash -787606936, now seen corresponding path program 181 times [2022-03-18 00:40:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:30,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1522740197] [2022-03-18 00:40:31,636 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:40:31,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:40:31,637 INFO L85 PathProgramCache]: Analyzing trace with hash -787606936, now seen corresponding path program 182 times [2022-03-18 00:40:31,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:31,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252705762] [2022-03-18 00:40:31,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:31,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:31,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:33,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:33,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252705762] [2022-03-18 00:40:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252705762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:33,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509778993] [2022-03-18 00:40:33,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:40:33,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:33,803 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) [2022-03-18 00:40:33,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 00:40:33,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:40:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:33,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 00:40:33,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:42,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509778993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:42,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:42,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-03-18 00:40:42,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1522740197] [2022-03-18 00:40:42,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1522740197] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:42,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:42,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 00:40:42,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366202105] [2022-03-18 00:40:42,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:42,386 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 00:40:42,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 00:40:42,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17403, Invalid=19269, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 00:40:42,389 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:45,027 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2022-03-18 00:40:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-18 00:40:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 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 [2022-03-18 00:40:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:45,052 INFO L225 Difference]: With dead ends: 202 [2022-03-18 00:40:45,052 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 00:40:45,056 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=34618, Invalid=46892, Unknown=0, NotChecked=0, Total=81510 [2022-03-18 00:40:45,057 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 194 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:45,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 28 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:40:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 00:40:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-18 00:40:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2022-03-18 00:40:45,131 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2022-03-18 00:40:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:45,131 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2022-03-18 00:40:45,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.9484536082474226) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2022-03-18 00:40:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-18 00:40:45,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:45,132 INFO L500 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:45,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-18 00:40:45,349 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:45,349 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 124127012, now seen corresponding path program 183 times [2022-03-18 00:40:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:45,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [581969158] [2022-03-18 00:40:45,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:40:45,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:40:45,637 INFO L85 PathProgramCache]: Analyzing trace with hash 124127012, now seen corresponding path program 184 times [2022-03-18 00:40:45,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:45,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49974462] [2022-03-18 00:40:45,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:45,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:47,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:47,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:47,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49974462] [2022-03-18 00:40:47,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49974462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:47,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250317343] [2022-03-18 00:40:47,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:40:47,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:47,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:47,466 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) [2022-03-18 00:40:47,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 00:40:47,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:40:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 00:40:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:40:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:47,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:40:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250317343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:40:53,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:40:53,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-18 00:40:53,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:40:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [581969158] [2022-03-18 00:40:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [581969158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:40:53,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:40:53,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 00:40:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844490012] [2022-03-18 00:40:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:40:53,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 00:40:53,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 00:40:53,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17778, Invalid=19664, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 00:40:53,331 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand has 98 states, 98 states have (on average 1.9489795918367347) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:56,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:40:56,958 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2022-03-18 00:40:56,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 00:40:56,958 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.9489795918367347) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 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 [2022-03-18 00:40:56,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:40:56,959 INFO L225 Difference]: With dead ends: 204 [2022-03-18 00:40:56,959 INFO L226 Difference]: Without dead ends: 199 [2022-03-18 00:40:56,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=35366, Invalid=47866, Unknown=0, NotChecked=0, Total=83232 [2022-03-18 00:40:56,962 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:40:56,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 48 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:40:56,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-18 00:40:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-03-18 00:40:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.005181347150259) internal successors, (194), 193 states have internal predecessors, (194), 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) [2022-03-18 00:40:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2022-03-18 00:40:57,021 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2022-03-18 00:40:57,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:40:57,021 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2022-03-18 00:40:57,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.9489795918367347) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:40:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2022-03-18 00:40:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-18 00:40:57,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:40:57,022 INFO L500 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:40:57,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-18 00:40:57,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:57,239 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:40:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:40:57,239 INFO L85 PathProgramCache]: Analyzing trace with hash 127122656, now seen corresponding path program 185 times [2022-03-18 00:40:57,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:40:57,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [905135806] [2022-03-18 00:40:57,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:40:57,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:40:57,663 INFO L85 PathProgramCache]: Analyzing trace with hash 127122656, now seen corresponding path program 186 times [2022-03-18 00:40:57,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:40:57,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483965268] [2022-03-18 00:40:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:40:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:40:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:40:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:40:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:40:59,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:40:59,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483965268] [2022-03-18 00:40:59,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483965268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:40:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047251974] [2022-03-18 00:40:59,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:40:59,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:40:59,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:40:59,736 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) [2022-03-18 00:40:59,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 00:40:59,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-03-18 00:40:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:40:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 00:40:59,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:00,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:06,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047251974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:06,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:06,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-18 00:41:06,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:06,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [905135806] [2022-03-18 00:41:06,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [905135806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:06,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:06,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 00:41:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135922188] [2022-03-18 00:41:06,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:06,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 00:41:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:06,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 00:41:06,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18157, Invalid=20063, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 00:41:06,843 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand has 99 states, 99 states have (on average 1.9494949494949494) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:10,166 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2022-03-18 00:41:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-18 00:41:10,166 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9494949494949494) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-18 00:41:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:10,167 INFO L225 Difference]: With dead ends: 206 [2022-03-18 00:41:10,167 INFO L226 Difference]: Without dead ends: 201 [2022-03-18 00:41:10,170 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6154 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=36122, Invalid=48850, Unknown=0, NotChecked=0, Total=84972 [2022-03-18 00:41:10,170 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 198 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:10,170 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 63 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:41:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-18 00:41:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-03-18 00:41:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.005128205128205) internal successors, (196), 195 states have internal predecessors, (196), 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) [2022-03-18 00:41:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-03-18 00:41:10,256 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2022-03-18 00:41:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:10,256 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-03-18 00:41:10,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9494949494949494) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-03-18 00:41:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-18 00:41:10,257 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:10,257 INFO L500 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:10,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:10,457 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:10,457 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:10,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1289030756, now seen corresponding path program 187 times [2022-03-18 00:41:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582490068] [2022-03-18 00:41:10,981 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:41:10,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:41:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1289030756, now seen corresponding path program 188 times [2022-03-18 00:41:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849655111] [2022-03-18 00:41:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:10,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:13,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:13,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849655111] [2022-03-18 00:41:13,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849655111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546779592] [2022-03-18 00:41:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:41:13,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:13,539 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) [2022-03-18 00:41:13,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 00:41:13,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:41:13,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:13,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-18 00:41:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:14,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:20,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:20,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546779592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:20,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:20,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-18 00:41:20,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:20,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582490068] [2022-03-18 00:41:20,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582490068] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:20,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:20,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 00:41:20,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106876402] [2022-03-18 00:41:20,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:20,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 00:41:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:20,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 00:41:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 00:41:20,729 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand has 100 states, 100 states have (on average 1.95) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:23,905 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2022-03-18 00:41:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 00:41:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.95) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 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 [2022-03-18 00:41:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:23,907 INFO L225 Difference]: With dead ends: 208 [2022-03-18 00:41:23,907 INFO L226 Difference]: Without dead ends: 203 [2022-03-18 00:41:23,913 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=36886, Invalid=49844, Unknown=0, NotChecked=0, Total=86730 [2022-03-18 00:41:23,913 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 200 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:23,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 53 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:41:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-18 00:41:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-18 00:41:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0050761421319796) internal successors, (198), 197 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2022-03-18 00:41:23,998 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2022-03-18 00:41:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:23,998 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2022-03-18 00:41:23,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.95) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2022-03-18 00:41:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-18 00:41:23,999 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:23,999 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:24,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 00:41:24,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:24,213 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash -707826856, now seen corresponding path program 189 times [2022-03-18 00:41:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:24,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060172036] [2022-03-18 00:41:27,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:41:27,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:41:27,240 INFO L85 PathProgramCache]: Analyzing trace with hash -707826856, now seen corresponding path program 190 times [2022-03-18 00:41:27,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:27,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847288126] [2022-03-18 00:41:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:30,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847288126] [2022-03-18 00:41:30,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847288126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407431576] [2022-03-18 00:41:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:41:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:30,123 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) [2022-03-18 00:41:30,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 00:41:30,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:41:30,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 00:41:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:30,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407431576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:36,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:36,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-18 00:41:36,631 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:36,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060172036] [2022-03-18 00:41:36,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060172036] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:36,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:36,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 00:41:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400096540] [2022-03-18 00:41:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:36,631 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 00:41:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 00:41:36,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18927, Invalid=20873, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 00:41:36,634 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand has 101 states, 101 states have (on average 1.9504950495049505) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:39,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:39,766 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-03-18 00:41:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-18 00:41:39,767 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9504950495049505) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 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 [2022-03-18 00:41:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:39,768 INFO L225 Difference]: With dead ends: 210 [2022-03-18 00:41:39,768 INFO L226 Difference]: Without dead ends: 205 [2022-03-18 00:41:39,772 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=37658, Invalid=50848, Unknown=0, NotChecked=0, Total=88506 [2022-03-18 00:41:39,772 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 202 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:39,772 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 43 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:41:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-18 00:41:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-03-18 00:41:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0050251256281406) internal successors, (200), 199 states have internal predecessors, (200), 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) [2022-03-18 00:41:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2022-03-18 00:41:39,845 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2022-03-18 00:41:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:39,845 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2022-03-18 00:41:39,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9504950495049505) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2022-03-18 00:41:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 00:41:39,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:39,846 INFO L500 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:39,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:40,063 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,SelfDestructingSolverStorable95 [2022-03-18 00:41:40,064 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:40,064 INFO L85 PathProgramCache]: Analyzing trace with hash -516627436, now seen corresponding path program 191 times [2022-03-18 00:41:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:40,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234285381] [2022-03-18 00:41:40,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:41:40,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:41:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash -516627436, now seen corresponding path program 192 times [2022-03-18 00:41:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:40,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538161917] [2022-03-18 00:41:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:40,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:43,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:41:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:41:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:41:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538161917] [2022-03-18 00:41:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538161917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:41:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268325976] [2022-03-18 00:41:43,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:41:43,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:43,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:41:43,924 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) [2022-03-18 00:41:43,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 00:41:44,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-03-18 00:41:44,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:41:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 00:41:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:41:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:44,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:41:53,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:41:53,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268325976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:41:53,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:41:53,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-18 00:41:53,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:41:53,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234285381] [2022-03-18 00:41:53,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234285381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:41:53,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:41:53,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 00:41:53,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556926003] [2022-03-18 00:41:53,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:41:53,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 00:41:53,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 00:41:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19318, Invalid=21284, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 00:41:53,929 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand has 102 states, 102 states have (on average 1.9509803921568627) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:57,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:41:57,685 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-03-18 00:41:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 00:41:57,685 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.9509803921568627) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-18 00:41:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:41:57,686 INFO L225 Difference]: With dead ends: 212 [2022-03-18 00:41:57,686 INFO L226 Difference]: Without dead ends: 207 [2022-03-18 00:41:57,689 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=38438, Invalid=51862, Unknown=0, NotChecked=0, Total=90300 [2022-03-18 00:41:57,689 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:41:57,689 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 53 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:41:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-18 00:41:57,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-03-18 00:41:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0049751243781095) internal successors, (202), 201 states have internal predecessors, (202), 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) [2022-03-18 00:41:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2022-03-18 00:41:57,774 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2022-03-18 00:41:57,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:41:57,774 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2022-03-18 00:41:57,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.9509803921568627) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:41:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2022-03-18 00:41:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-18 00:41:57,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:41:57,775 INFO L500 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:41:57,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 00:41:57,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:41:57,977 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:41:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:41:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1457578544, now seen corresponding path program 193 times [2022-03-18 00:41:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:41:57,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2000847445] [2022-03-18 00:41:58,422 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:41:58,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:41:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1457578544, now seen corresponding path program 194 times [2022-03-18 00:41:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:41:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348819925] [2022-03-18 00:41:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:41:58,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:41:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:42:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:00,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:42:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348819925] [2022-03-18 00:42:00,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348819925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:42:00,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022610482] [2022-03-18 00:42:00,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:42:00,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:00,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:42:00,503 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) [2022-03-18 00:42:00,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 00:42:00,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:42:00,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:42:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 00:42:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:42:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:00,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:42:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022610482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:42:07,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:42:07,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2022-03-18 00:42:07,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:42:07,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2000847445] [2022-03-18 00:42:07,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2000847445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:42:07,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:42:07,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 00:42:07,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973367704] [2022-03-18 00:42:07,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:42:07,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 00:42:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 00:42:07,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19713, Invalid=21699, Unknown=0, NotChecked=0, Total=41412 [2022-03-18 00:42:07,100 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand has 103 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:42:10,237 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-03-18 00:42:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-18 00:42:10,237 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 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 [2022-03-18 00:42:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:42:10,238 INFO L225 Difference]: With dead ends: 214 [2022-03-18 00:42:10,238 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 00:42:10,241 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6612 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=39226, Invalid=52886, Unknown=0, NotChecked=0, Total=92112 [2022-03-18 00:42:10,252 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 206 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:42:10,252 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 48 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:42:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 00:42:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-03-18 00:42:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0049261083743843) internal successors, (204), 203 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2022-03-18 00:42:10,316 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 205 [2022-03-18 00:42:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:42:10,316 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2022-03-18 00:42:10,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.9514563106796117) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2022-03-18 00:42:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-18 00:42:10,317 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:42:10,317 INFO L500 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:42:10,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-18 00:42:10,534 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:10,534 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:42:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:42:10,534 INFO L85 PathProgramCache]: Analyzing trace with hash 526506124, now seen corresponding path program 195 times [2022-03-18 00:42:10,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:10,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465206585] [2022-03-18 00:42:10,958 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:42:10,958 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:42:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash 526506124, now seen corresponding path program 196 times [2022-03-18 00:42:10,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:42:10,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377454603] [2022-03-18 00:42:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:42:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:42:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:13,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:42:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:13,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:42:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377454603] [2022-03-18 00:42:13,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377454603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:42:13,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229362678] [2022-03-18 00:42:13,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:42:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:42:13,494 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) [2022-03-18 00:42:13,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 00:42:13,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:42:13,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:42:13,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 102 conjunts are in the unsatisfiable core [2022-03-18 00:42:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:42:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:13,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:42:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:20,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229362678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:42:20,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:42:20,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103, 103] total 206 [2022-03-18 00:42:20,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:42:20,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465206585] [2022-03-18 00:42:20,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465206585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:42:20,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:42:20,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-18 00:42:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450071139] [2022-03-18 00:42:20,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:42:20,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-18 00:42:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-18 00:42:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20112, Invalid=22118, Unknown=0, NotChecked=0, Total=42230 [2022-03-18 00:42:20,690 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand has 104 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:42:23,889 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-03-18 00:42:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 00:42:23,889 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 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 [2022-03-18 00:42:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:42:23,890 INFO L225 Difference]: With dead ends: 216 [2022-03-18 00:42:23,890 INFO L226 Difference]: Without dead ends: 211 [2022-03-18 00:42:23,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6729 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=40022, Invalid=53920, Unknown=0, NotChecked=0, Total=93942 [2022-03-18 00:42:23,894 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 208 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:42:23,894 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 63 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:42:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-18 00:42:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-03-18 00:42:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0048780487804878) internal successors, (206), 205 states have internal predecessors, (206), 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) [2022-03-18 00:42:23,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-03-18 00:42:23,960 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 207 [2022-03-18 00:42:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:42:23,960 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-03-18 00:42:23,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.9519230769230769) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:23,960 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-03-18 00:42:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-18 00:42:23,961 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:42:23,961 INFO L500 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:42:23,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-18 00:42:24,178 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,SelfDestructingSolverStorable98 [2022-03-18 00:42:24,178 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:42:24,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:42:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 266392648, now seen corresponding path program 197 times [2022-03-18 00:42:24,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:24,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1205146874] [2022-03-18 00:42:25,020 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:42:25,020 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:42:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash 266392648, now seen corresponding path program 198 times [2022-03-18 00:42:25,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:42:25,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904008286] [2022-03-18 00:42:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:42:25,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:42:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:27,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:42:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:42:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904008286] [2022-03-18 00:42:27,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904008286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:42:27,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040156581] [2022-03-18 00:42:27,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:42:27,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:27,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:42:27,757 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) [2022-03-18 00:42:27,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 00:42:27,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-03-18 00:42:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:42:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 00:42:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:42:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:28,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:42:35,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:35,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040156581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:42:35,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:42:35,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 208 [2022-03-18 00:42:35,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:42:35,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1205146874] [2022-03-18 00:42:35,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1205146874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:42:35,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:42:35,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-18 00:42:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076607163] [2022-03-18 00:42:35,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:42:35,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-18 00:42:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-18 00:42:35,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-03-18 00:42:35,163 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:42:38,760 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2022-03-18 00:42:38,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-18 00:42:38,760 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-18 00:42:38,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:42:38,764 INFO L225 Difference]: With dead ends: 218 [2022-03-18 00:42:38,764 INFO L226 Difference]: Without dead ends: 213 [2022-03-18 00:42:38,769 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6847 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=40826, Invalid=54964, Unknown=0, NotChecked=0, Total=95790 [2022-03-18 00:42:38,769 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:42:38,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 48 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:42:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-18 00:42:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-03-18 00:42:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0048309178743962) internal successors, (208), 207 states have internal predecessors, (208), 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) [2022-03-18 00:42:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-03-18 00:42:38,885 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-03-18 00:42:38,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:42:38,886 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-03-18 00:42:38,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:38,886 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-03-18 00:42:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-18 00:42:38,887 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:42:38,887 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:42:38,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-18 00:42:39,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:39,107 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:42:39,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:42:39,108 INFO L85 PathProgramCache]: Analyzing trace with hash -594554620, now seen corresponding path program 199 times [2022-03-18 00:42:39,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:39,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1264693742] [2022-03-18 00:42:44,034 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:42:44,035 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:42:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -594554620, now seen corresponding path program 200 times [2022-03-18 00:42:44,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:42:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940158404] [2022-03-18 00:42:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:42:44,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:42:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:42:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:42:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:47,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:42:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940158404] [2022-03-18 00:42:47,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940158404] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:42:47,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491524596] [2022-03-18 00:42:47,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:42:47,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:47,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:42:47,505 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) [2022-03-18 00:42:47,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 00:42:47,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:42:47,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:42:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 00:42:47,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:42:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:47,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:42:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:42:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491524596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:42:55,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:42:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 105, 105] total 210 [2022-03-18 00:42:55,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:42:55,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1264693742] [2022-03-18 00:42:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1264693742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:42:55,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:42:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-18 00:42:55,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871126157] [2022-03-18 00:42:55,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:42:55,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-18 00:42:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:55,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-18 00:42:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20922, Invalid=22968, Unknown=0, NotChecked=0, Total=43890 [2022-03-18 00:42:55,142 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand has 106 states, 106 states have (on average 1.9528301886792452) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:58,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:42:58,137 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2022-03-18 00:42:58,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 00:42:58,138 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.9528301886792452) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 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 [2022-03-18 00:42:58,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:42:58,139 INFO L225 Difference]: With dead ends: 220 [2022-03-18 00:42:58,139 INFO L226 Difference]: Without dead ends: 215 [2022-03-18 00:42:58,143 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6966 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=41638, Invalid=56018, Unknown=0, NotChecked=0, Total=97656 [2022-03-18 00:42:58,143 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 212 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:42:58,143 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 63 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:42:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-18 00:42:58,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-03-18 00:42:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0047846889952152) internal successors, (210), 209 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions. [2022-03-18 00:42:58,214 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 211 [2022-03-18 00:42:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:42:58,214 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 214 transitions. [2022-03-18 00:42:58,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.9528301886792452) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:42:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions. [2022-03-18 00:42:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-18 00:42:58,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:42:58,216 INFO L500 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:42:58,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-18 00:42:58,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:42:58,435 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:42:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:42:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash 963808960, now seen corresponding path program 201 times [2022-03-18 00:42:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:42:58,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235589458] [2022-03-18 00:42:59,160 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:42:59,160 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:42:59,160 INFO L85 PathProgramCache]: Analyzing trace with hash 963808960, now seen corresponding path program 202 times [2022-03-18 00:42:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:42:59,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639666627] [2022-03-18 00:42:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:42:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:42:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:01,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:01,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639666627] [2022-03-18 00:43:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639666627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:01,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570735031] [2022-03-18 00:43:01,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:43:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:01,516 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) [2022-03-18 00:43:01,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 00:43:01,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:43:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 00:43:01,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:09,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570735031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:09,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:09,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2022-03-18 00:43:09,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:09,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235589458] [2022-03-18 00:43:09,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235589458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:09,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:09,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-18 00:43:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529908616] [2022-03-18 00:43:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:09,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-18 00:43:09,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-18 00:43:09,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21333, Invalid=23399, Unknown=0, NotChecked=0, Total=44732 [2022-03-18 00:43:09,696 INFO L87 Difference]: Start difference. First operand 214 states and 214 transitions. Second operand has 107 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:13,334 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2022-03-18 00:43:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-18 00:43:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 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 [2022-03-18 00:43:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:13,340 INFO L225 Difference]: With dead ends: 222 [2022-03-18 00:43:13,340 INFO L226 Difference]: Without dead ends: 217 [2022-03-18 00:43:13,345 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 322 SyntacticMatches, 1 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7086 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=42458, Invalid=57082, Unknown=0, NotChecked=0, Total=99540 [2022-03-18 00:43:13,345 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 214 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:13,346 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 48 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:43:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-18 00:43:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-03-18 00:43:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.004739336492891) internal successors, (212), 211 states have internal predecessors, (212), 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) [2022-03-18 00:43:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 216 transitions. [2022-03-18 00:43:13,420 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 216 transitions. Word has length 213 [2022-03-18 00:43:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:13,420 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 216 transitions. [2022-03-18 00:43:13,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 216 transitions. [2022-03-18 00:43:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-18 00:43:13,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:13,421 INFO L500 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:13,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:13,627 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,SelfDestructingSolverStorable101 [2022-03-18 00:43:13,628 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -392376964, now seen corresponding path program 203 times [2022-03-18 00:43:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309442926] [2022-03-18 00:43:14,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:43:14,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -392376964, now seen corresponding path program 204 times [2022-03-18 00:43:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:14,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959289558] [2022-03-18 00:43:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:16,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:16,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:16,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959289558] [2022-03-18 00:43:16,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959289558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:16,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138006388] [2022-03-18 00:43:16,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:43:16,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:16,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:16,494 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) [2022-03-18 00:43:16,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 00:43:16,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2022-03-18 00:43:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-18 00:43:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:17,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138006388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:23,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2022-03-18 00:43:23,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:23,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [309442926] [2022-03-18 00:43:23,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [309442926] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:23,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:23,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-18 00:43:23,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713969691] [2022-03-18 00:43:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:23,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-18 00:43:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-18 00:43:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21748, Invalid=23834, Unknown=0, NotChecked=0, Total=45582 [2022-03-18 00:43:23,557 INFO L87 Difference]: Start difference. First operand 216 states and 216 transitions. Second operand has 108 states, 108 states have (on average 1.9537037037037037) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:27,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:27,052 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2022-03-18 00:43:27,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 00:43:27,052 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.9537037037037037) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-03-18 00:43:27,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:27,053 INFO L225 Difference]: With dead ends: 224 [2022-03-18 00:43:27,053 INFO L226 Difference]: Without dead ends: 219 [2022-03-18 00:43:27,057 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7207 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=43286, Invalid=58156, Unknown=0, NotChecked=0, Total=101442 [2022-03-18 00:43:27,057 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 216 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:27,057 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 68 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:43:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-18 00:43:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-03-18 00:43:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0046948356807512) internal successors, (214), 213 states have internal predecessors, (214), 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) [2022-03-18 00:43:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2022-03-18 00:43:27,128 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 215 [2022-03-18 00:43:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:27,128 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2022-03-18 00:43:27,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.9537037037037037) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2022-03-18 00:43:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-18 00:43:27,129 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:27,129 INFO L500 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:27,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:27,336 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,SelfDestructingSolverStorable102 [2022-03-18 00:43:27,336 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:27,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:27,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1983008056, now seen corresponding path program 205 times [2022-03-18 00:43:27,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:27,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1290371567] [2022-03-18 00:43:27,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:43:27,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1983008056, now seen corresponding path program 206 times [2022-03-18 00:43:27,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:27,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957208367] [2022-03-18 00:43:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:27,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:30,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957208367] [2022-03-18 00:43:30,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957208367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908424457] [2022-03-18 00:43:30,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:43:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:30,218 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) [2022-03-18 00:43:30,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 00:43:30,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:43:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 00:43:30,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:30,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908424457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:38,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 216 [2022-03-18 00:43:38,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:38,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1290371567] [2022-03-18 00:43:38,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1290371567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:38,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-18 00:43:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368150215] [2022-03-18 00:43:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:38,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-18 00:43:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-18 00:43:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22167, Invalid=24273, Unknown=0, NotChecked=0, Total=46440 [2022-03-18 00:43:38,986 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand has 109 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:42,632 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2022-03-18 00:43:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-18 00:43:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 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 [2022-03-18 00:43:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:42,633 INFO L225 Difference]: With dead ends: 226 [2022-03-18 00:43:42,633 INFO L226 Difference]: Without dead ends: 221 [2022-03-18 00:43:42,636 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 320 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7329 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=44122, Invalid=59240, Unknown=0, NotChecked=0, Total=103362 [2022-03-18 00:43:42,636 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 218 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:42,636 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 48 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:43:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-18 00:43:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-03-18 00:43:42,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0046511627906978) internal successors, (216), 215 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:42,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2022-03-18 00:43:42,708 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 217 [2022-03-18 00:43:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:42,708 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2022-03-18 00:43:42,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.9541284403669725) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:42,708 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2022-03-18 00:43:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-18 00:43:42,708 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:42,708 INFO L500 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:42,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 00:43:42,917 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash -194589196, now seen corresponding path program 207 times [2022-03-18 00:43:42,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:42,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1374023008] [2022-03-18 00:43:43,612 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:43:43,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash -194589196, now seen corresponding path program 208 times [2022-03-18 00:43:43,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:43,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203212784] [2022-03-18 00:43:43,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:43,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:47,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:47,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203212784] [2022-03-18 00:43:47,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203212784] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:47,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815580060] [2022-03-18 00:43:47,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:43:47,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:47,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:47,042 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) [2022-03-18 00:43:47,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-18 00:43:47,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:43:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:47,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-18 00:43:47,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:43:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815580060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:55,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:55,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 109, 109] total 218 [2022-03-18 00:43:55,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:55,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1374023008] [2022-03-18 00:43:55,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1374023008] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:55,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:55,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-18 00:43:55,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139270963] [2022-03-18 00:43:55,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:55,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-18 00:43:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:55,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-18 00:43:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22590, Invalid=24716, Unknown=0, NotChecked=0, Total=47306 [2022-03-18 00:43:55,317 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand has 110 states, 110 states have (on average 1.9545454545454546) internal successors, (215), 108 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:59,143 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2022-03-18 00:43:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 00:43:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9545454545454546) internal successors, (215), 108 states have internal predecessors, (215), 2 states have call successors, (3), 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 [2022-03-18 00:43:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:59,144 INFO L225 Difference]: With dead ends: 228 [2022-03-18 00:43:59,144 INFO L226 Difference]: Without dead ends: 223 [2022-03-18 00:43:59,147 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7452 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=44966, Invalid=60334, Unknown=0, NotChecked=0, Total=105300 [2022-03-18 00:43:59,147 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 220 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:59,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 48 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:43:59,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-03-18 00:43:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-03-18 00:43:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0046082949308757) internal successors, (218), 217 states have internal predecessors, (218), 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) [2022-03-18 00:43:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2022-03-18 00:43:59,222 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 219 [2022-03-18 00:43:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:59,222 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2022-03-18 00:43:59,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.9545454545454546) internal successors, (215), 108 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:43:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2022-03-18 00:43:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 00:43:59,224 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:59,224 INFO L500 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:59,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-18 00:43:59,428 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:59,428 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:59,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1216475216, now seen corresponding path program 209 times [2022-03-18 00:43:59,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:59,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172457680] [2022-03-18 00:44:00,010 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:44:00,010 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:44:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1216475216, now seen corresponding path program 210 times [2022-03-18 00:44:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:44:00,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162139270] [2022-03-18 00:44:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:44:00,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:44:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:44:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:44:02,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162139270] [2022-03-18 00:44:02,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162139270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:44:02,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984478513] [2022-03-18 00:44:02,839 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:44:02,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:44:02,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:44:02,841 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) [2022-03-18 00:44:02,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-18 00:44:03,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 106 check-sat command(s) [2022-03-18 00:44:03,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:44:03,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 00:44:03,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:44:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:03,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:44:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:13,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984478513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:44:13,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:44:13,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110, 110] total 220 [2022-03-18 00:44:13,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:44:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172457680] [2022-03-18 00:44:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172457680] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:44:13,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:44:13,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-18 00:44:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331813050] [2022-03-18 00:44:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:44:13,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-18 00:44:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-18 00:44:13,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23017, Invalid=25163, Unknown=0, NotChecked=0, Total=48180 [2022-03-18 00:44:13,434 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand has 111 states, 111 states have (on average 1.954954954954955) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:44:17,248 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2022-03-18 00:44:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-18 00:44:17,248 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.954954954954955) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-03-18 00:44:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:44:17,249 INFO L225 Difference]: With dead ends: 230 [2022-03-18 00:44:17,249 INFO L226 Difference]: Without dead ends: 225 [2022-03-18 00:44:17,252 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 334 SyntacticMatches, 1 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7576 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=45818, Invalid=61438, Unknown=0, NotChecked=0, Total=107256 [2022-03-18 00:44:17,253 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 222 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:44:17,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 63 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:44:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-18 00:44:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-03-18 00:44:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.004566210045662) internal successors, (220), 219 states have internal predecessors, (220), 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) [2022-03-18 00:44:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2022-03-18 00:44:17,343 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 221 [2022-03-18 00:44:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:44:17,343 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2022-03-18 00:44:17,343 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.954954954954955) internal successors, (217), 109 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2022-03-18 00:44:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-18 00:44:17,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:44:17,344 INFO L500 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:44:17,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-18 00:44:17,559 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,SelfDestructingSolverStorable105 [2022-03-18 00:44:17,559 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:44:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:44:17,559 INFO L85 PathProgramCache]: Analyzing trace with hash 298570348, now seen corresponding path program 211 times [2022-03-18 00:44:17,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:17,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [707184135] [2022-03-18 00:44:18,219 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:44:18,219 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:44:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 298570348, now seen corresponding path program 212 times [2022-03-18 00:44:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:44:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281777988] [2022-03-18 00:44:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:44:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:44:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:21,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:44:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:44:21,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281777988] [2022-03-18 00:44:21,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281777988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:44:21,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974361557] [2022-03-18 00:44:21,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:44:21,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:44:21,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:44:21,474 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) [2022-03-18 00:44:21,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-18 00:44:21,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:44:21,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:44:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1215 conjuncts, 110 conjunts are in the unsatisfiable core [2022-03-18 00:44:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:44:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:21,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:44:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974361557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:44:33,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:44:33,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 111, 111] total 222 [2022-03-18 00:44:33,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:44:33,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [707184135] [2022-03-18 00:44:33,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [707184135] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:44:33,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:44:33,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-03-18 00:44:33,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597650195] [2022-03-18 00:44:33,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:44:33,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-03-18 00:44:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:33,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-03-18 00:44:33,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23448, Invalid=25614, Unknown=0, NotChecked=0, Total=49062 [2022-03-18 00:44:33,355 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 110 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:44:38,073 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2022-03-18 00:44:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 00:44:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 110 states have internal predecessors, (219), 2 states have call successors, (3), 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 [2022-03-18 00:44:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:44:38,074 INFO L225 Difference]: With dead ends: 232 [2022-03-18 00:44:38,074 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 00:44:38,078 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7701 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=46678, Invalid=62552, Unknown=0, NotChecked=0, Total=109230 [2022-03-18 00:44:38,078 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 224 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:44:38,078 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 38 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:44:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 00:44:38,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-03-18 00:44:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.004524886877828) internal successors, (222), 221 states have internal predecessors, (222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:38,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 226 transitions. [2022-03-18 00:44:38,171 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 226 transitions. Word has length 223 [2022-03-18 00:44:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:44:38,172 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 226 transitions. [2022-03-18 00:44:38,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9553571428571428) internal successors, (219), 110 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 226 transitions. [2022-03-18 00:44:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-03-18 00:44:38,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:44:38,172 INFO L500 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:44:38,190 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-18 00:44:38,381 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-18 00:44:38,381 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:44:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:44:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash 263444008, now seen corresponding path program 213 times [2022-03-18 00:44:38,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:38,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636846272] [2022-03-18 00:44:39,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:44:39,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:44:39,309 INFO L85 PathProgramCache]: Analyzing trace with hash 263444008, now seen corresponding path program 214 times [2022-03-18 00:44:39,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:44:39,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162922676] [2022-03-18 00:44:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:44:39,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:44:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:42,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:44:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:44:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:42,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:44:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162922676] [2022-03-18 00:44:42,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162922676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:44:42,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588053484] [2022-03-18 00:44:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:44:42,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:44:42,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:44:42,975 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) [2022-03-18 00:44:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-18 00:44:43,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:44:43,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:44:43,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 00:44:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:44:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:43,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:44:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:44:53,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588053484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:44:53,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:44:53,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 224 [2022-03-18 00:44:53,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:44:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636846272] [2022-03-18 00:44:53,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636846272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:44:53,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:44:53,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-18 00:44:53,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205344037] [2022-03-18 00:44:53,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:44:53,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-18 00:44:53,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-18 00:44:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23883, Invalid=26069, Unknown=0, NotChecked=0, Total=49952 [2022-03-18 00:44:53,150 INFO L87 Difference]: Start difference. First operand 226 states and 226 transitions. Second operand has 113 states, 113 states have (on average 1.9557522123893805) internal successors, (221), 111 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:44:57,854 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2022-03-18 00:44:57,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-18 00:44:57,854 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.9557522123893805) internal successors, (221), 111 states have internal predecessors, (221), 2 states have call successors, (3), 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 [2022-03-18 00:44:57,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:44:57,855 INFO L225 Difference]: With dead ends: 234 [2022-03-18 00:44:57,855 INFO L226 Difference]: Without dead ends: 229 [2022-03-18 00:44:57,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 673 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7827 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=47546, Invalid=63676, Unknown=0, NotChecked=0, Total=111222 [2022-03-18 00:44:57,858 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 226 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:44:57,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 58 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:44:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-18 00:44:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-03-18 00:44:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0044843049327354) internal successors, (224), 223 states have internal predecessors, (224), 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) [2022-03-18 00:44:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2022-03-18 00:44:57,934 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 225 [2022-03-18 00:44:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:44:57,934 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2022-03-18 00:44:57,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.9557522123893805) internal successors, (221), 111 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:44:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2022-03-18 00:44:57,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-03-18 00:44:57,935 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:44:57,935 INFO L500 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:44:57,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-18 00:44:58,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:44:58,139 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:44:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:44:58,139 INFO L85 PathProgramCache]: Analyzing trace with hash 866769636, now seen corresponding path program 215 times [2022-03-18 00:44:58,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:44:58,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889586097] [2022-03-18 00:44:58,684 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:44:58,685 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:44:58,685 INFO L85 PathProgramCache]: Analyzing trace with hash 866769636, now seen corresponding path program 216 times [2022-03-18 00:44:58,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:44:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705418136] [2022-03-18 00:44:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:44:58,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:44:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:01,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:01,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:01,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705418136] [2022-03-18 00:45:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705418136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:01,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058334456] [2022-03-18 00:45:01,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:45:01,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:01,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:01,624 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) [2022-03-18 00:45:01,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-18 00:45:01,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2022-03-18 00:45:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:01,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-18 00:45:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:02,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058334456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:11,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:11,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 113, 113] total 226 [2022-03-18 00:45:11,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:11,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889586097] [2022-03-18 00:45:11,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889586097] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:11,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:11,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-03-18 00:45:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721870402] [2022-03-18 00:45:11,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:11,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-03-18 00:45:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-03-18 00:45:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24322, Invalid=26528, Unknown=0, NotChecked=0, Total=50850 [2022-03-18 00:45:11,442 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand has 114 states, 114 states have (on average 1.956140350877193) internal successors, (223), 112 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:16,080 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2022-03-18 00:45:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 00:45:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.956140350877193) internal successors, (223), 112 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-03-18 00:45:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:16,081 INFO L225 Difference]: With dead ends: 236 [2022-03-18 00:45:16,081 INFO L226 Difference]: Without dead ends: 231 [2022-03-18 00:45:16,087 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7954 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=48422, Invalid=64810, Unknown=0, NotChecked=0, Total=113232 [2022-03-18 00:45:16,087 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:16,087 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 43 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-18 00:45:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-03-18 00:45:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0044444444444445) internal successors, (226), 225 states have internal predecessors, (226), 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) [2022-03-18 00:45:16,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2022-03-18 00:45:16,221 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 227 [2022-03-18 00:45:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:16,221 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2022-03-18 00:45:16,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.956140350877193) internal successors, (223), 112 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2022-03-18 00:45:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-03-18 00:45:16,222 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:16,222 INFO L500 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:16,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:16,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:16,435 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash 842113184, now seen corresponding path program 217 times [2022-03-18 00:45:16,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201782408] [2022-03-18 00:45:17,286 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:45:17,286 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:45:17,286 INFO L85 PathProgramCache]: Analyzing trace with hash 842113184, now seen corresponding path program 218 times [2022-03-18 00:45:17,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498888958] [2022-03-18 00:45:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:17,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:20,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:20,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498888958] [2022-03-18 00:45:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498888958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:20,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231466093] [2022-03-18 00:45:20,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:45:20,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:20,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:20,285 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) [2022-03-18 00:45:20,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-18 00:45:20,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:45:20,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 00:45:20,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:20,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:31,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231466093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:31,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:31,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 114] total 228 [2022-03-18 00:45:31,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:31,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201782408] [2022-03-18 00:45:31,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201782408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:31,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:31,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-18 00:45:31,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740193690] [2022-03-18 00:45:31,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:31,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-18 00:45:31,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-18 00:45:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24765, Invalid=26991, Unknown=0, NotChecked=0, Total=51756 [2022-03-18 00:45:31,947 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand has 115 states, 115 states have (on average 1.9565217391304348) internal successors, (225), 113 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:36,357 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2022-03-18 00:45:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-18 00:45:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.9565217391304348) internal successors, (225), 113 states have internal predecessors, (225), 2 states have call successors, (3), 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 [2022-03-18 00:45:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:36,358 INFO L225 Difference]: With dead ends: 238 [2022-03-18 00:45:36,358 INFO L226 Difference]: Without dead ends: 233 [2022-03-18 00:45:36,363 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8082 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=49306, Invalid=65954, Unknown=0, NotChecked=0, Total=115260 [2022-03-18 00:45:36,363 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 230 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:36,363 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 53 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-18 00:45:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-03-18 00:45:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0044052863436124) internal successors, (228), 227 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2022-03-18 00:45:36,465 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 229 [2022-03-18 00:45:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:36,465 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2022-03-18 00:45:36,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.9565217391304348) internal successors, (225), 113 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2022-03-18 00:45:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-03-18 00:45:36,466 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:36,466 INFO L500 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:36,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-18 00:45:36,684 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,SelfDestructingSolverStorable109 [2022-03-18 00:45:36,684 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:36,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1377900708, now seen corresponding path program 219 times [2022-03-18 00:45:36,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1421745419] [2022-03-18 00:45:37,392 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:45:37,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:45:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1377900708, now seen corresponding path program 220 times [2022-03-18 00:45:37,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:37,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428849976] [2022-03-18 00:45:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:40,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:45:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:45:40,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:40,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:45:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428849976] [2022-03-18 00:45:40,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428849976] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:45:40,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301275439] [2022-03-18 00:45:40,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:45:40,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:40,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:45:40,863 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) [2022-03-18 00:45:40,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-18 00:45:41,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:45:41,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:45:41,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1259 conjuncts, 114 conjunts are in the unsatisfiable core [2022-03-18 00:45:41,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:45:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:41,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:45:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:45:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301275439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:45:52,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:45:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 115, 115] total 230 [2022-03-18 00:45:52,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:45:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1421745419] [2022-03-18 00:45:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1421745419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:45:52,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:45:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-03-18 00:45:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428725028] [2022-03-18 00:45:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:45:52,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-03-18 00:45:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-03-18 00:45:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25212, Invalid=27458, Unknown=0, NotChecked=0, Total=52670 [2022-03-18 00:45:52,777 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand has 116 states, 116 states have (on average 1.956896551724138) internal successors, (227), 114 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:45:57,385 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2022-03-18 00:45:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 00:45:57,386 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.956896551724138) internal successors, (227), 114 states have internal predecessors, (227), 2 states have call successors, (3), 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 [2022-03-18 00:45:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:45:57,386 INFO L225 Difference]: With dead ends: 240 [2022-03-18 00:45:57,386 INFO L226 Difference]: Without dead ends: 235 [2022-03-18 00:45:57,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8211 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=50198, Invalid=67108, Unknown=0, NotChecked=0, Total=117306 [2022-03-18 00:45:57,391 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 232 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:45:57,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 43 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:45:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-18 00:45:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-03-18 00:45:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0043668122270741) internal successors, (230), 229 states have internal predecessors, (230), 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) [2022-03-18 00:45:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 234 transitions. [2022-03-18 00:45:57,489 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 234 transitions. Word has length 231 [2022-03-18 00:45:57,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:45:57,489 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 234 transitions. [2022-03-18 00:45:57,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.956896551724138) internal successors, (227), 114 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:45:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 234 transitions. [2022-03-18 00:45:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-18 00:45:57,490 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:45:57,490 INFO L500 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:45:57,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-18 00:45:57,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:45:57,690 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:45:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:45:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -212504808, now seen corresponding path program 221 times [2022-03-18 00:45:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:45:57,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267760006] [2022-03-18 00:45:58,826 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:45:58,826 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:45:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash -212504808, now seen corresponding path program 222 times [2022-03-18 00:45:58,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:45:58,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288051312] [2022-03-18 00:45:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:45:58,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:45:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:01,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:01,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288051312] [2022-03-18 00:46:01,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288051312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:01,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428107811] [2022-03-18 00:46:01,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:46:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:01,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:01,261 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) [2022-03-18 00:46:01,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-18 00:46:01,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 112 check-sat command(s) [2022-03-18 00:46:01,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:01,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 00:46:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:01,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:46:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:11,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428107811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:46:11,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:46:11,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 232 [2022-03-18 00:46:11,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:46:11,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267760006] [2022-03-18 00:46:11,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267760006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:46:11,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:46:11,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-18 00:46:11,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470755698] [2022-03-18 00:46:11,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:46:11,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-18 00:46:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-18 00:46:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25663, Invalid=27929, Unknown=0, NotChecked=0, Total=53592 [2022-03-18 00:46:11,422 INFO L87 Difference]: Start difference. First operand 234 states and 234 transitions. Second operand has 117 states, 117 states have (on average 1.9572649572649572) internal successors, (229), 115 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:46:15,713 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2022-03-18 00:46:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-18 00:46:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.9572649572649572) internal successors, (229), 115 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-03-18 00:46:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:46:15,714 INFO L225 Difference]: With dead ends: 242 [2022-03-18 00:46:15,714 INFO L226 Difference]: Without dead ends: 237 [2022-03-18 00:46:15,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 352 SyntacticMatches, 1 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8341 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=51098, Invalid=68272, Unknown=0, NotChecked=0, Total=119370 [2022-03-18 00:46:15,718 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 234 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:46:15,718 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 38 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:46:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-18 00:46:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-03-18 00:46:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0043290043290043) internal successors, (232), 231 states have internal predecessors, (232), 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) [2022-03-18 00:46:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2022-03-18 00:46:15,801 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 233 [2022-03-18 00:46:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:46:15,801 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2022-03-18 00:46:15,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.9572649572649572) internal successors, (229), 115 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:46:15,802 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2022-03-18 00:46:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-03-18 00:46:15,802 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:46:15,802 INFO L500 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:46:15,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-18 00:46:16,015 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,SelfDestructingSolverStorable111 [2022-03-18 00:46:16,015 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:46:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:46:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1253509164, now seen corresponding path program 223 times [2022-03-18 00:46:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:46:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [533705219] [2022-03-18 00:46:16,725 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-18 00:46:16,726 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:46:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1253509164, now seen corresponding path program 224 times [2022-03-18 00:46:16,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:46:16,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879831508] [2022-03-18 00:46:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:46:16,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:46:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:46:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:46:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:46:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879831508] [2022-03-18 00:46:19,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879831508] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:46:19,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882313035] [2022-03-18 00:46:19,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:46:19,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:46:19,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:46:19,419 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) [2022-03-18 00:46:19,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-18 00:46:19,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:46:19,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:46:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 00:46:19,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:46:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:46:20,011 INFO L328 TraceCheckSpWp]: Computing backward predicates...