/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-b030c9e [2022-03-20 18:28:22,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:28:22,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:28:22,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:28:22,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:28:22,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:28:22,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:28:22,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:28:22,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:28:22,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:28:22,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:28:22,856 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:28:22,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:28:22,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:28:22,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:28:22,858 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:28:22,858 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:28:22,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:28:22,858 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:28:22,858 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:28:23,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:28:23,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:28:23,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:28:23,070 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:28:23,070 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:28:23,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-20 18:28:23,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeea6c38/a48e59cd2a52404db45993a56e2e5883/FLAG07b54dccf [2022-03-20 18:28:23,432 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:28:23,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet.i [2022-03-20 18:28:23,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeea6c38/a48e59cd2a52404db45993a56e2e5883/FLAG07b54dccf [2022-03-20 18:28:23,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfeea6c38/a48e59cd2a52404db45993a56e2e5883 [2022-03-20 18:28:23,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:28:23,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:28:23,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:28:23,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:28:23,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:28:23,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:28:23" (1/1) ... [2022-03-20 18:28:23,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60029929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:23, skipping insertion in model container [2022-03-20 18:28:23,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:28:23" (1/1) ... [2022-03-20 18:28:23,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:28:23,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:28:24,001 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] [2022-03-20 18:28:24,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:28:24,016 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:28:24,025 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] [2022-03-20 18:28:24,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:28:24,036 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:28:24,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24 WrapperNode [2022-03-20 18:28:24,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:28:24,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:28:24,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:28:24,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:28:24,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,050 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:28:24,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:28:24,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:28:24,055 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:28:24,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (1/1) ... [2022-03-20 18:28:24,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:28:24,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:24,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:28:24,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:28:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:28:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:28:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:28:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:28:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:28:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:28:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:28:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:28:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:28:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:28:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:28:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:28:24,160 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:28:24,161 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:28:24,234 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:28:24,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:28:24,239 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:28:24,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:28:24 BoogieIcfgContainer [2022-03-20 18:28:24,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:28:24,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:28:24,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:28:24,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:28:24,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:28:23" (1/3) ... [2022-03-20 18:28:24,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dede51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:28:24, skipping insertion in model container [2022-03-20 18:28:24,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:28:24" (2/3) ... [2022-03-20 18:28:24,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27dede51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:28:24, skipping insertion in model container [2022-03-20 18:28:24,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:28:24" (3/3) ... [2022-03-20 18:28:24,252 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2022-03-20 18:28:24,256 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:28:24,256 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:28:24,291 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:28:24,296 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:28:24,297 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:28:24,306 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) [2022-03-20 18:28:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 18:28:24,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:24,312 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:24,313 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:24,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2089905556, now seen corresponding path program 1 times [2022-03-20 18:28:24,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:24,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637665078] [2022-03-20 18:28:24,333 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:28:24,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2089905556, now seen corresponding path program 2 times [2022-03-20 18:28:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365089998] [2022-03-20 18:28:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:24,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:24,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365089998] [2022-03-20 18:28:24,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365089998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:24,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:24,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:24,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637665078] [2022-03-20 18:28:24,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637665078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:24,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:24,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 18:28:24,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804164449] [2022-03-20 18:28:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:24,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 18:28:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:24,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 18:28:24,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 18:28:24,502 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) [2022-03-20 18:28:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:24,593 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-03-20 18:28:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 18:28:24,596 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 [2022-03-20 18:28:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:24,600 INFO L225 Difference]: With dead ends: 36 [2022-03-20 18:28:24,601 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 18:28:24,603 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 18:28:24,606 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:24,607 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:28:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 18:28:24,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-03-20 18:28:24,631 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) [2022-03-20 18:28:24,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-03-20 18:28:24,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2022-03-20 18:28:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:24,633 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-03-20 18:28:24,633 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) [2022-03-20 18:28:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-03-20 18:28:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 18:28:24,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:24,634 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:24,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 18:28:24,635 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash -545306800, now seen corresponding path program 1 times [2022-03-20 18:28:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [981613304] [2022-03-20 18:28:25,154 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:25,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -545306800, now seen corresponding path program 2 times [2022-03-20 18:28:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532053954] [2022-03-20 18:28:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:25,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532053954] [2022-03-20 18:28:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532053954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:25,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029675258] [2022-03-20 18:28:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:25,234 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) [2022-03-20 18:28:25,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:28:25,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:25,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 18:28:25,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:25,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029675258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:25,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:25,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-20 18:28:25,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:25,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [981613304] [2022-03-20 18:28:25,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [981613304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:25,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:25,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 18:28:25,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678302353] [2022-03-20 18:28:25,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:25,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 18:28:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 18:28:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 18:28:25,482 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) [2022-03-20 18:28:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:25,531 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2022-03-20 18:28:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 18:28:25,532 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 [2022-03-20 18:28:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:25,534 INFO L225 Difference]: With dead ends: 21 [2022-03-20 18:28:25,534 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 18:28:25,536 INFO L912 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 [2022-03-20 18:28:25,538 INFO L913 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 [2022-03-20 18:28:25,542 INFO L914 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] [2022-03-20 18:28:25,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 18:28:25,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-20 18:28:25,549 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) [2022-03-20 18:28:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-03-20 18:28:25,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2022-03-20 18:28:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:25,551 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-03-20 18:28:25,551 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) [2022-03-20 18:28:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-03-20 18:28:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 18:28:25,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:25,552 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:25,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 18:28:25,767 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 [2022-03-20 18:28:25,768 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1046323724, now seen corresponding path program 3 times [2022-03-20 18:28:25,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:25,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933937021] [2022-03-20 18:28:26,190 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:26,190 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1046323724, now seen corresponding path program 4 times [2022-03-20 18:28:26,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:26,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708580711] [2022-03-20 18:28:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:26,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:26,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:26,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:26,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708580711] [2022-03-20 18:28:26,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708580711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:26,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819136363] [2022-03-20 18:28:26,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:26,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:26,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:26,324 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) [2022-03-20 18:28:26,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:28:26,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 18:28:26,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:26,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:26,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819136363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:26,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:26,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 18:28:26,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933937021] [2022-03-20 18:28:26,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933937021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:26,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:26,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 18:28:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419897880] [2022-03-20 18:28:26,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:26,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:28:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:28:26,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:28:26,490 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) [2022-03-20 18:28:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:26,561 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 18:28:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:28:26,561 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 [2022-03-20 18:28:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:26,562 INFO L225 Difference]: With dead ends: 24 [2022-03-20 18:28:26,562 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 18:28:26,562 INFO L912 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 [2022-03-20 18:28:26,563 INFO L913 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 [2022-03-20 18:28:26,564 INFO L914 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] [2022-03-20 18:28:26,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 18:28:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-03-20 18:28:26,567 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) [2022-03-20 18:28:26,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-03-20 18:28:26,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2022-03-20 18:28:26,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:26,568 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-03-20 18:28:26,568 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) [2022-03-20 18:28:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-03-20 18:28:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 18:28:26,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:26,569 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:26,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:26,787 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 [2022-03-20 18:28:26,787 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:26,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1594899912, now seen corresponding path program 5 times [2022-03-20 18:28:26,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [693456795] [2022-03-20 18:28:27,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:27,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1594899912, now seen corresponding path program 6 times [2022-03-20 18:28:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268922536] [2022-03-20 18:28:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:27,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268922536] [2022-03-20 18:28:27,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268922536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622810818] [2022-03-20 18:28:27,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:27,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:27,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:27,300 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) [2022-03-20 18:28:27,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:28:27,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 18:28:27,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 18:28:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:27,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622810818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:27,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:27,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-03-20 18:28:27,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:27,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [693456795] [2022-03-20 18:28:27,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [693456795] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:27,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:27,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:28:27,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133896602] [2022-03-20 18:28:27,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:27,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 18:28:27,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:27,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 18:28:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:28:27,480 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) [2022-03-20 18:28:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:27,567 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 18:28:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 18:28:27,567 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 [2022-03-20 18:28:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:27,569 INFO L225 Difference]: With dead ends: 26 [2022-03-20 18:28:27,569 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 18:28:27,570 INFO L912 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 [2022-03-20 18:28:27,572 INFO L913 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 [2022-03-20 18:28:27,573 INFO L914 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] [2022-03-20 18:28:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 18:28:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-20 18:28:27,580 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) [2022-03-20 18:28:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2022-03-20 18:28:27,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2022-03-20 18:28:27,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:27,581 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2022-03-20 18:28:27,581 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) [2022-03-20 18:28:27,581 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2022-03-20 18:28:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 18:28:27,582 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:27,582 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:27,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:27,795 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 [2022-03-20 18:28:27,796 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:27,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash 495639172, now seen corresponding path program 7 times [2022-03-20 18:28:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:27,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [900450328] [2022-03-20 18:28:30,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:30,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash 495639172, now seen corresponding path program 8 times [2022-03-20 18:28:30,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443379135] [2022-03-20 18:28:30,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:30,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:30,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:30,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443379135] [2022-03-20 18:28:30,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443379135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:30,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857925021] [2022-03-20 18:28:30,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:30,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:30,816 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) [2022-03-20 18:28:30,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:28:30,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:30,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 18:28:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:30,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:30,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857925021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:30,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:30,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 18:28:30,999 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:30,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [900450328] [2022-03-20 18:28:30,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [900450328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:30,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:30,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 18:28:31,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41133715] [2022-03-20 18:28:31,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:31,000 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:28:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:28:31,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:28:31,001 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) [2022-03-20 18:28:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:31,085 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 18:28:31,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:28:31,086 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 [2022-03-20 18:28:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:31,086 INFO L225 Difference]: With dead ends: 28 [2022-03-20 18:28:31,086 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 18:28:31,087 INFO L912 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 [2022-03-20 18:28:31,088 INFO L913 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 [2022-03-20 18:28:31,088 INFO L914 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] [2022-03-20 18:28:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 18:28:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-03-20 18:28:31,091 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) [2022-03-20 18:28:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-03-20 18:28:31,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2022-03-20 18:28:31,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:31,092 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-03-20 18:28:31,092 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) [2022-03-20 18:28:31,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-03-20 18:28:31,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 18:28:31,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:31,093 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:31,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:31,307 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 [2022-03-20 18:28:31,307 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:31,308 INFO L85 PathProgramCache]: Analyzing trace with hash 668022848, now seen corresponding path program 9 times [2022-03-20 18:28:31,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:31,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785842934] [2022-03-20 18:28:31,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:31,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash 668022848, now seen corresponding path program 10 times [2022-03-20 18:28:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:31,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255205088] [2022-03-20 18:28:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:31,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:31,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:31,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255205088] [2022-03-20 18:28:31,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255205088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:31,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238460021] [2022-03-20 18:28:31,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:31,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:31,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:31,762 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) [2022-03-20 18:28:31,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:28:31,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:31,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:31,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 18:28:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:31,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:31,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238460021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:31,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:31,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 18:28:31,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785842934] [2022-03-20 18:28:31,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785842934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:31,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:31,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:28:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216898300] [2022-03-20 18:28:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:31,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 18:28:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 18:28:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:28:31,992 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) [2022-03-20 18:28:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:32,104 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 18:28:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 18:28:32,105 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 [2022-03-20 18:28:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:32,106 INFO L225 Difference]: With dead ends: 30 [2022-03-20 18:28:32,106 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 18:28:32,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:28:32,108 INFO L913 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 [2022-03-20 18:28:32,108 INFO L914 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] [2022-03-20 18:28:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 18:28:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-20 18:28:32,113 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) [2022-03-20 18:28:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2022-03-20 18:28:32,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2022-03-20 18:28:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:32,116 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2022-03-20 18:28:32,117 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) [2022-03-20 18:28:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2022-03-20 18:28:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 18:28:32,117 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:32,118 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:32,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:32,340 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 [2022-03-20 18:28:32,341 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1174989060, now seen corresponding path program 11 times [2022-03-20 18:28:32,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:32,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592688372] [2022-03-20 18:28:32,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:32,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1174989060, now seen corresponding path program 12 times [2022-03-20 18:28:32,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:32,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791456756] [2022-03-20 18:28:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791456756] [2022-03-20 18:28:32,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791456756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:32,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465079183] [2022-03-20 18:28:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:32,936 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) [2022-03-20 18:28:32,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:28:32,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 18:28:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 18:28:32,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:33,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:33,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465079183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:33,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:33,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-20 18:28:33,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592688372] [2022-03-20 18:28:33,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592688372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:33,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:33,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 18:28:33,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612754127] [2022-03-20 18:28:33,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:33,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:28:33,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:28:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:28:33,190 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) [2022-03-20 18:28:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:33,313 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 18:28:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:28:33,313 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 [2022-03-20 18:28:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:33,314 INFO L225 Difference]: With dead ends: 32 [2022-03-20 18:28:33,314 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 18:28:33,314 INFO L912 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 [2022-03-20 18:28:33,315 INFO L913 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 [2022-03-20 18:28:33,315 INFO L914 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] [2022-03-20 18:28:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 18:28:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 18:28:33,319 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) [2022-03-20 18:28:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2022-03-20 18:28:33,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2022-03-20 18:28:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:33,320 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2022-03-20 18:28:33,320 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) [2022-03-20 18:28:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2022-03-20 18:28:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 18:28:33,321 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:33,321 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:33,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:33,524 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 [2022-03-20 18:28:33,525 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:33,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1512060600, now seen corresponding path program 13 times [2022-03-20 18:28:33,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592819110] [2022-03-20 18:28:34,132 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:34,132 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:34,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1512060600, now seen corresponding path program 14 times [2022-03-20 18:28:34,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:34,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916261885] [2022-03-20 18:28:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:34,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:34,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916261885] [2022-03-20 18:28:34,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916261885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337982678] [2022-03-20 18:28:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:34,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:34,223 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) [2022-03-20 18:28:34,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:28:34,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:34,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 18:28:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:34,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:34,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337982678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:34,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:34,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 18:28:34,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:34,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592819110] [2022-03-20 18:28:34,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592819110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:34,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:34,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:28:34,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628030579] [2022-03-20 18:28:34,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:34,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 18:28:34,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:34,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 18:28:34,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:28:34,497 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) [2022-03-20 18:28:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:34,623 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 18:28:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 18:28:34,624 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 [2022-03-20 18:28:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:34,624 INFO L225 Difference]: With dead ends: 34 [2022-03-20 18:28:34,624 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 18:28:34,625 INFO L912 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 [2022-03-20 18:28:34,626 INFO L913 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 [2022-03-20 18:28:34,626 INFO L914 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] [2022-03-20 18:28:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 18:28:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-20 18:28:34,630 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) [2022-03-20 18:28:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-03-20 18:28:34,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2022-03-20 18:28:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:34,630 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-03-20 18:28:34,631 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) [2022-03-20 18:28:34,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-03-20 18:28:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 18:28:34,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:34,631 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:34,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:34,839 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 [2022-03-20 18:28:34,839 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:34,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1803528332, now seen corresponding path program 15 times [2022-03-20 18:28:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:34,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1068406453] [2022-03-20 18:28:38,734 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:38,735 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:38,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1803528332, now seen corresponding path program 16 times [2022-03-20 18:28:38,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:38,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39491812] [2022-03-20 18:28:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:38,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:38,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:38,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39491812] [2022-03-20 18:28:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39491812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097687972] [2022-03-20 18:28:38,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:38,844 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) [2022-03-20 18:28:38,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:28:38,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:38,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 18:28:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:38,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:39,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097687972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:39,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:39,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 18:28:39,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1068406453] [2022-03-20 18:28:39,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1068406453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:39,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:39,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 18:28:39,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846649159] [2022-03-20 18:28:39,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:39,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:28:39,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:39,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:28:39,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:28:39,140 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) [2022-03-20 18:28:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:39,278 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 18:28:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:28:39,278 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 [2022-03-20 18:28:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:39,279 INFO L225 Difference]: With dead ends: 36 [2022-03-20 18:28:39,279 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 18:28:39,280 INFO L912 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 [2022-03-20 18:28:39,280 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:39,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:28:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 18:28:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-03-20 18:28:39,284 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) [2022-03-20 18:28:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2022-03-20 18:28:39,285 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2022-03-20 18:28:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:39,285 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2022-03-20 18:28:39,285 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) [2022-03-20 18:28:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2022-03-20 18:28:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 18:28:39,286 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:39,286 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:39,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:39,499 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 [2022-03-20 18:28:39,500 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1218758352, now seen corresponding path program 17 times [2022-03-20 18:28:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371747872] [2022-03-20 18:28:39,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:39,841 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1218758352, now seen corresponding path program 18 times [2022-03-20 18:28:39,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559299256] [2022-03-20 18:28:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559299256] [2022-03-20 18:28:39,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559299256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:39,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286117993] [2022-03-20 18:28:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:39,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:39,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:39,954 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) [2022-03-20 18:28:39,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:28:40,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 18:28:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 18:28:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:40,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:40,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:40,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286117993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:40,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:40,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-03-20 18:28:40,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:40,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371747872] [2022-03-20 18:28:40,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371747872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:40,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:40,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:28:40,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677008894] [2022-03-20 18:28:40,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:40,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 18:28:40,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 18:28:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=491, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:28:40,319 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) [2022-03-20 18:28:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:40,460 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 18:28:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 18:28:40,461 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 [2022-03-20 18:28:40,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:40,462 INFO L225 Difference]: With dead ends: 38 [2022-03-20 18:28:40,462 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 18:28:40,463 INFO L912 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 [2022-03-20 18:28:40,464 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:40,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:28:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 18:28:40,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-03-20 18:28:40,471 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) [2022-03-20 18:28:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2022-03-20 18:28:40,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2022-03-20 18:28:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:40,475 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2022-03-20 18:28:40,475 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) [2022-03-20 18:28:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-03-20 18:28:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 18:28:40,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:40,476 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:40,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:40,689 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 [2022-03-20 18:28:40,690 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1895523348, now seen corresponding path program 19 times [2022-03-20 18:28:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:40,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241025382] [2022-03-20 18:28:41,388 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:41,388 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1895523348, now seen corresponding path program 20 times [2022-03-20 18:28:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:41,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521354192] [2022-03-20 18:28:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:41,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:41,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521354192] [2022-03-20 18:28:41,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521354192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:41,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327139961] [2022-03-20 18:28:41,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:41,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:41,526 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) [2022-03-20 18:28:41,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:28:41,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:41,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 18:28:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:41,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:41,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327139961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:41,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:41,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 18:28:41,888 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:41,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241025382] [2022-03-20 18:28:41,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241025382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:41,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:41,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 18:28:41,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647815559] [2022-03-20 18:28:41,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:41,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:28:41,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:41,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:28:41,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:28:41,889 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) [2022-03-20 18:28:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:42,035 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 18:28:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:28:42,035 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 [2022-03-20 18:28:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:42,035 INFO L225 Difference]: With dead ends: 40 [2022-03-20 18:28:42,036 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 18:28:42,036 INFO L912 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 [2022-03-20 18:28:42,037 INFO L913 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 [2022-03-20 18:28:42,037 INFO L914 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] [2022-03-20 18:28:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 18:28:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-20 18:28:42,041 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) [2022-03-20 18:28:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2022-03-20 18:28:42,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 31 [2022-03-20 18:28:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:42,042 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2022-03-20 18:28:42,042 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) [2022-03-20 18:28:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2022-03-20 18:28:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 18:28:42,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:42,043 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:42,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:42,251 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 [2022-03-20 18:28:42,251 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:42,252 INFO L85 PathProgramCache]: Analyzing trace with hash 568344488, now seen corresponding path program 21 times [2022-03-20 18:28:42,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:42,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619894674] [2022-03-20 18:28:42,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:42,640 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 568344488, now seen corresponding path program 22 times [2022-03-20 18:28:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:42,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501009208] [2022-03-20 18:28:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:42,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:42,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:42,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501009208] [2022-03-20 18:28:42,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501009208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:42,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966659965] [2022-03-20 18:28:42,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:42,798 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) [2022-03-20 18:28:42,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:28:42,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:42,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 18:28:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:42,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:43,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966659965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:43,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:43,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 18:28:43,169 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619894674] [2022-03-20 18:28:43,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619894674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:43,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:43,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:28:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437128404] [2022-03-20 18:28:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:43,170 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 18:28:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 18:28:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=629, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:28:43,171 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) [2022-03-20 18:28:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:43,337 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 18:28:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 18:28:43,337 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 [2022-03-20 18:28:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:43,338 INFO L225 Difference]: With dead ends: 42 [2022-03-20 18:28:43,338 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 18:28:43,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=698, Invalid=1372, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:28:43,339 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:43,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:28:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 18:28:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 18:28:43,343 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) [2022-03-20 18:28:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2022-03-20 18:28:43,344 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 33 [2022-03-20 18:28:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:43,344 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2022-03-20 18:28:43,344 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) [2022-03-20 18:28:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2022-03-20 18:28:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 18:28:43,345 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:43,345 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:43,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:43,563 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 [2022-03-20 18:28:43,563 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:43,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:43,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1818354788, now seen corresponding path program 23 times [2022-03-20 18:28:43,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:43,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117431611] [2022-03-20 18:28:44,000 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:44,000 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1818354788, now seen corresponding path program 24 times [2022-03-20 18:28:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:44,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828329465] [2022-03-20 18:28:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:44,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:44,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828329465] [2022-03-20 18:28:44,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828329465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:44,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003391731] [2022-03-20 18:28:44,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:44,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:44,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:44,132 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) [2022-03-20 18:28:44,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:28:44,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 18:28:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 18:28:44,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:44,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003391731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:44,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:44,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-03-20 18:28:44,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:44,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117431611] [2022-03-20 18:28:44,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117431611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:44,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:44,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 18:28:44,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881068750] [2022-03-20 18:28:44,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:44,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:28:44,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:44,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:28:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=704, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:28:44,521 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) [2022-03-20 18:28:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:44,725 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 18:28:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:28:44,726 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 [2022-03-20 18:28:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:44,726 INFO L225 Difference]: With dead ends: 44 [2022-03-20 18:28:44,726 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 18:28:44,727 INFO L912 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 [2022-03-20 18:28:44,728 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:44,728 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:28:44,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 18:28:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-20 18:28:44,732 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) [2022-03-20 18:28:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-03-20 18:28:44,733 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 35 [2022-03-20 18:28:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:44,733 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-03-20 18:28:44,733 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) [2022-03-20 18:28:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-03-20 18:28:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 18:28:44,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:44,734 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:44,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:44,934 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 [2022-03-20 18:28:44,935 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:44,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:44,935 INFO L85 PathProgramCache]: Analyzing trace with hash 487410208, now seen corresponding path program 25 times [2022-03-20 18:28:44,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:44,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1506007655] [2022-03-20 18:28:45,376 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:45,376 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:45,376 INFO L85 PathProgramCache]: Analyzing trace with hash 487410208, now seen corresponding path program 26 times [2022-03-20 18:28:45,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:45,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64879240] [2022-03-20 18:28:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:45,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:45,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64879240] [2022-03-20 18:28:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64879240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507064818] [2022-03-20 18:28:45,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:45,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:45,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:45,542 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) [2022-03-20 18:28:45,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:28:45,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:45,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 18:28:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:45,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:45,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507064818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:45,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:45,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 18:28:45,967 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1506007655] [2022-03-20 18:28:45,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1506007655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:45,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:45,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:28:45,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909679898] [2022-03-20 18:28:45,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:45,968 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 18:28:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 18:28:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:28:45,969 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) [2022-03-20 18:28:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:46,184 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 18:28:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 18:28:46,185 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 [2022-03-20 18:28:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:46,185 INFO L225 Difference]: With dead ends: 46 [2022-03-20 18:28:46,185 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 18:28:46,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=922, Invalid=1730, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:28:46,186 INFO L913 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 [2022-03-20 18:28:46,187 INFO L914 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] [2022-03-20 18:28:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 18:28:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-03-20 18:28:46,192 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) [2022-03-20 18:28:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2022-03-20 18:28:46,192 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 37 [2022-03-20 18:28:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:46,193 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2022-03-20 18:28:46,193 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) [2022-03-20 18:28:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2022-03-20 18:28:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 18:28:46,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:46,194 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:46,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:46,395 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 [2022-03-20 18:28:46,395 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1349923036, now seen corresponding path program 27 times [2022-03-20 18:28:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:46,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955221809] [2022-03-20 18:28:46,761 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:46,762 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:46,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1349923036, now seen corresponding path program 28 times [2022-03-20 18:28:46,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:46,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529256598] [2022-03-20 18:28:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:46,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:46,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:46,951 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:46,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529256598] [2022-03-20 18:28:46,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529256598] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:46,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577974182] [2022-03-20 18:28:46,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:46,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:46,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:46,955 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) [2022-03-20 18:28:46,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:28:46,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 18:28:46,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:47,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:47,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577974182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:47,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:47,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 18:28:47,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:47,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955221809] [2022-03-20 18:28:47,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955221809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:47,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:47,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 18:28:47,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559752302] [2022-03-20 18:28:47,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:47,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:28:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:47,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:28:47,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=866, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:28:47,423 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) [2022-03-20 18:28:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:47,627 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 18:28:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:28:47,627 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 [2022-03-20 18:28:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:47,627 INFO L225 Difference]: With dead ends: 48 [2022-03-20 18:28:47,628 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 18:28:47,629 INFO L912 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 [2022-03-20 18:28:47,629 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:47,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:28:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 18:28:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-20 18:28:47,635 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) [2022-03-20 18:28:47,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2022-03-20 18:28:47,635 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 39 [2022-03-20 18:28:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:47,636 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2022-03-20 18:28:47,636 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) [2022-03-20 18:28:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2022-03-20 18:28:47,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 18:28:47,636 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:47,636 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:47,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:47,843 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 [2022-03-20 18:28:47,843 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1296062616, now seen corresponding path program 29 times [2022-03-20 18:28:47,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:47,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [681740728] [2022-03-20 18:28:48,111 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:48,111 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:48,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1296062616, now seen corresponding path program 30 times [2022-03-20 18:28:48,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:48,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935901737] [2022-03-20 18:28:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:48,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935901737] [2022-03-20 18:28:48,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935901737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:48,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94257285] [2022-03-20 18:28:48,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:48,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:48,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:48,297 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) [2022-03-20 18:28:48,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:28:48,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 18:28:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 18:28:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:48,445 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:48,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94257285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:48,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:48,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-03-20 18:28:48,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:48,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [681740728] [2022-03-20 18:28:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [681740728] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:48,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:48,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:28:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78639559] [2022-03-20 18:28:48,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:48,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 18:28:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 18:28:48,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=953, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:28:48,820 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) [2022-03-20 18:28:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:49,060 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 18:28:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 18:28:49,060 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 [2022-03-20 18:28:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:49,061 INFO L225 Difference]: With dead ends: 50 [2022-03-20 18:28:49,061 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 18:28:49,062 INFO L912 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 [2022-03-20 18:28:49,062 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:49,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:28:49,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 18:28:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-03-20 18:28:49,071 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) [2022-03-20 18:28:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2022-03-20 18:28:49,072 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 41 [2022-03-20 18:28:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:49,072 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2022-03-20 18:28:49,072 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) [2022-03-20 18:28:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2022-03-20 18:28:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 18:28:49,074 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:49,074 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:49,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:49,274 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 [2022-03-20 18:28:49,275 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:49,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1075806548, now seen corresponding path program 31 times [2022-03-20 18:28:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:49,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985258817] [2022-03-20 18:28:49,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:49,615 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:49,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1075806548, now seen corresponding path program 32 times [2022-03-20 18:28:49,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:49,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330761897] [2022-03-20 18:28:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:49,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:49,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:49,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330761897] [2022-03-20 18:28:49,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330761897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:49,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049874676] [2022-03-20 18:28:49,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:49,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:49,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:49,816 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) [2022-03-20 18:28:49,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:28:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:49,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 18:28:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:49,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:50,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049874676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:50,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:50,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 18:28:50,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:50,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985258817] [2022-03-20 18:28:50,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985258817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:50,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:50,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 18:28:50,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430440864] [2022-03-20 18:28:50,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:50,333 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:28:50,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:50,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:28:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1044, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:28:50,334 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) [2022-03-20 18:28:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:50,569 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 18:28:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:28:50,569 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 [2022-03-20 18:28:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:50,570 INFO L225 Difference]: With dead ends: 52 [2022-03-20 18:28:50,570 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 18:28:50,571 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1318, Invalid=2342, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 18:28:50,571 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:50,571 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 43 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:28:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 18:28:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-20 18:28:50,577 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) [2022-03-20 18:28:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2022-03-20 18:28:50,578 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 43 [2022-03-20 18:28:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:50,579 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2022-03-20 18:28:50,579 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) [2022-03-20 18:28:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2022-03-20 18:28:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 18:28:50,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:50,580 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:50,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 18:28:50,787 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 [2022-03-20 18:28:50,787 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:50,788 INFO L85 PathProgramCache]: Analyzing trace with hash -136877296, now seen corresponding path program 33 times [2022-03-20 18:28:50,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:50,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804641021] [2022-03-20 18:28:51,296 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:51,296 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:51,296 INFO L85 PathProgramCache]: Analyzing trace with hash -136877296, now seen corresponding path program 34 times [2022-03-20 18:28:51,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:51,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368328086] [2022-03-20 18:28:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:51,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:51,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:51,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368328086] [2022-03-20 18:28:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368328086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227372585] [2022-03-20 18:28:51,489 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:28:51,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:51,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:51,492 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) [2022-03-20 18:28:51,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:28:51,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:28:51,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:51,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 18:28:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:51,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227372585] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:52,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:52,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 18:28:52,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804641021] [2022-03-20 18:28:52,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804641021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:52,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:52,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:28:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507688824] [2022-03-20 18:28:52,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:52,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 18:28:52,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 18:28:52,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=1139, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:28:52,064 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) [2022-03-20 18:28:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:52,367 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 18:28:52,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 18:28:52,367 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 [2022-03-20 18:28:52,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:52,368 INFO L225 Difference]: With dead ends: 54 [2022-03-20 18:28:52,368 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 18:28:52,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1466, Invalid=2566, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:28:52,370 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:28:52,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 53 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:28:52,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 18:28:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-03-20 18:28:52,381 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) [2022-03-20 18:28:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-03-20 18:28:52,381 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 45 [2022-03-20 18:28:52,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:52,381 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-03-20 18:28:52,381 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) [2022-03-20 18:28:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-03-20 18:28:52,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 18:28:52,384 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:52,384 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:52,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:52,607 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 [2022-03-20 18:28:52,607 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:52,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1589914164, now seen corresponding path program 35 times [2022-03-20 18:28:52,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:52,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1946591444] [2022-03-20 18:28:53,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:53,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1589914164, now seen corresponding path program 36 times [2022-03-20 18:28:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:53,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448910997] [2022-03-20 18:28:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:53,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:53,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:53,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448910997] [2022-03-20 18:28:53,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448910997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:53,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113830586] [2022-03-20 18:28:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:28:53,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:53,424 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) [2022-03-20 18:28:53,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:28:53,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 18:28:53,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 18:28:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:53,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:54,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113830586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:54,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:54,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-03-20 18:28:54,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:54,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1946591444] [2022-03-20 18:28:54,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1946591444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:54,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:54,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 18:28:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685031584] [2022-03-20 18:28:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:54,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:28:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:54,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:28:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=832, Invalid=1238, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:28:54,084 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) [2022-03-20 18:28:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:54,362 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 18:28:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:28:54,363 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 [2022-03-20 18:28:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:54,363 INFO L225 Difference]: With dead ends: 56 [2022-03-20 18:28:54,363 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 18:28:54,364 INFO L912 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 [2022-03-20 18:28:54,365 INFO L913 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 [2022-03-20 18:28:54,365 INFO L914 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] [2022-03-20 18:28:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 18:28:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 18:28:54,370 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) [2022-03-20 18:28:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2022-03-20 18:28:54,370 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 47 [2022-03-20 18:28:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:54,370 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2022-03-20 18:28:54,370 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) [2022-03-20 18:28:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2022-03-20 18:28:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 18:28:54,371 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:54,371 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:54,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:54,571 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 [2022-03-20 18:28:54,572 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2093973112, now seen corresponding path program 37 times [2022-03-20 18:28:54,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117386331] [2022-03-20 18:28:58,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:28:58,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:28:58,501 INFO L85 PathProgramCache]: Analyzing trace with hash -2093973112, now seen corresponding path program 38 times [2022-03-20 18:28:58,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:28:58,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434014132] [2022-03-20 18:28:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:28:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:28:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:58,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:28:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:28:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:28:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434014132] [2022-03-20 18:28:58,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434014132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:28:58,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603988873] [2022-03-20 18:28:58,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:28:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:28:58,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:28:58,736 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) [2022-03-20 18:28:58,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:28:58,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:28:58,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:28:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 18:28:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:28:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:58,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:28:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:28:59,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603988873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:28:59,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:28:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 18:28:59,385 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:28:59,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117386331] [2022-03-20 18:28:59,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117386331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:28:59,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:28:59,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:28:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563405673] [2022-03-20 18:28:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:28:59,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 18:28:59,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 18:28:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=1341, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:28:59,386 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) [2022-03-20 18:28:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:28:59,709 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 18:28:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 18:28:59,709 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 [2022-03-20 18:28:59,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:28:59,710 INFO L225 Difference]: With dead ends: 58 [2022-03-20 18:28:59,710 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 18:28:59,711 INFO L912 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 [2022-03-20 18:28:59,712 INFO L913 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 [2022-03-20 18:28:59,712 INFO L914 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] [2022-03-20 18:28:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 18:28:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-20 18:28:59,718 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) [2022-03-20 18:28:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2022-03-20 18:28:59,719 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 49 [2022-03-20 18:28:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:28:59,719 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2022-03-20 18:28:59,719 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) [2022-03-20 18:28:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2022-03-20 18:28:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 18:28:59,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:28:59,719 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:28:59,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 18:28:59,927 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 [2022-03-20 18:28:59,927 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:28:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:28:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1163317692, now seen corresponding path program 39 times [2022-03-20 18:28:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:28:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1932508219] [2022-03-20 18:29:00,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:00,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1163317692, now seen corresponding path program 40 times [2022-03-20 18:29:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:00,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935387115] [2022-03-20 18:29:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935387115] [2022-03-20 18:29:00,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935387115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:00,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801236948] [2022-03-20 18:29:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:00,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:00,681 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) [2022-03-20 18:29:00,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:29:00,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:00,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:00,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 18:29:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:00,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:01,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801236948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:01,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:01,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 18:29:01,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1932508219] [2022-03-20 18:29:01,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1932508219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:01,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:01,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 18:29:01,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229455313] [2022-03-20 18:29:01,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:01,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:29:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:29:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1002, Invalid=1448, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:29:01,340 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) [2022-03-20 18:29:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:01,645 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 18:29:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:29:01,645 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 [2022-03-20 18:29:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:01,646 INFO L225 Difference]: With dead ends: 60 [2022-03-20 18:29:01,646 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 18:29:01,647 INFO L912 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 [2022-03-20 18:29:01,647 INFO L913 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 [2022-03-20 18:29:01,648 INFO L914 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] [2022-03-20 18:29:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 18:29:01,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-03-20 18:29:01,653 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) [2022-03-20 18:29:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2022-03-20 18:29:01,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 51 [2022-03-20 18:29:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:01,653 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2022-03-20 18:29:01,653 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) [2022-03-20 18:29:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2022-03-20 18:29:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 18:29:01,654 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:01,654 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:01,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 18:29:01,854 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 [2022-03-20 18:29:01,854 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:01,855 INFO L85 PathProgramCache]: Analyzing trace with hash -156656640, now seen corresponding path program 41 times [2022-03-20 18:29:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:01,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89410548] [2022-03-20 18:29:02,302 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:02,302 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash -156656640, now seen corresponding path program 42 times [2022-03-20 18:29:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:02,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280522352] [2022-03-20 18:29:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:02,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:02,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280522352] [2022-03-20 18:29:02,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280522352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53324149] [2022-03-20 18:29:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:02,588 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) [2022-03-20 18:29:02,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:29:02,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 18:29:02,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:02,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 18:29:02,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:02,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:03,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53324149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:03,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:03,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-03-20 18:29:03,327 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:03,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89410548] [2022-03-20 18:29:03,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89410548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:03,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:03,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:29:03,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600611375] [2022-03-20 18:29:03,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:03,327 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 18:29:03,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 18:29:03,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=1559, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:29:03,328 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) [2022-03-20 18:29:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:03,645 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 18:29:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 18:29:03,647 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 [2022-03-20 18:29:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:03,647 INFO L225 Difference]: With dead ends: 62 [2022-03-20 18:29:03,647 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 18:29:03,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2138, Invalid=3562, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:29:03,649 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:29:03,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:29:03,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 18:29:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-03-20 18:29:03,655 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) [2022-03-20 18:29:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2022-03-20 18:29:03,656 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 53 [2022-03-20 18:29:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:03,656 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2022-03-20 18:29:03,656 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) [2022-03-20 18:29:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2022-03-20 18:29:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 18:29:03,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:03,657 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:03,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 18:29:03,867 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 [2022-03-20 18:29:03,867 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:03,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash 876972732, now seen corresponding path program 43 times [2022-03-20 18:29:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:03,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [755290821] [2022-03-20 18:29:04,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:04,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 876972732, now seen corresponding path program 44 times [2022-03-20 18:29:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:04,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584528696] [2022-03-20 18:29:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584528696] [2022-03-20 18:29:04,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584528696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:04,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136273412] [2022-03-20 18:29:04,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:04,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:04,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:04,493 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) [2022-03-20 18:29:04,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:29:04,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:04,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 18:29:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:04,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:05,295 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:05,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136273412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:05,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:05,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 18:29:05,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:05,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [755290821] [2022-03-20 18:29:05,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [755290821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:05,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:05,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 18:29:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44854484] [2022-03-20 18:29:05,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:05,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:29:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:29:05,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:29:05,298 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) [2022-03-20 18:29:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:05,657 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 18:29:05,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:29:05,658 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 [2022-03-20 18:29:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:05,658 INFO L225 Difference]: With dead ends: 64 [2022-03-20 18:29:05,658 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 18:29:05,659 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2326, Invalid=3836, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 18:29:05,659 INFO L913 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 [2022-03-20 18:29:05,660 INFO L914 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] [2022-03-20 18:29:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 18:29:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-20 18:29:05,665 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) [2022-03-20 18:29:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-03-20 18:29:05,666 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 55 [2022-03-20 18:29:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:05,666 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-03-20 18:29:05,666 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) [2022-03-20 18:29:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-03-20 18:29:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 18:29:05,666 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:05,666 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:05,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 18:29:05,867 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 [2022-03-20 18:29:05,867 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:05,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2057353848, now seen corresponding path program 45 times [2022-03-20 18:29:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068958565] [2022-03-20 18:29:06,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:06,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2057353848, now seen corresponding path program 46 times [2022-03-20 18:29:06,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386446728] [2022-03-20 18:29:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:06,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:06,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:06,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386446728] [2022-03-20 18:29:06,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386446728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:06,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85436878] [2022-03-20 18:29:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:06,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:06,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:06,617 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) [2022-03-20 18:29:06,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:29:06,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:06,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:06,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 18:29:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:06,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:07,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85436878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:07,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:07,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 18:29:07,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:07,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068958565] [2022-03-20 18:29:07,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068958565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:07,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:07,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:29:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480170888] [2022-03-20 18:29:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:07,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 18:29:07,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 18:29:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1287, Invalid=1793, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:29:07,431 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) [2022-03-20 18:29:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:07,807 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 18:29:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 18:29:07,807 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 [2022-03-20 18:29:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:07,808 INFO L225 Difference]: With dead ends: 66 [2022-03-20 18:29:07,808 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 18:29:07,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2522, Invalid=4120, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:29:07,809 INFO L913 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 [2022-03-20 18:29:07,809 INFO L914 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] [2022-03-20 18:29:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 18:29:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-03-20 18:29:07,816 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) [2022-03-20 18:29:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2022-03-20 18:29:07,817 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 57 [2022-03-20 18:29:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:07,817 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2022-03-20 18:29:07,817 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) [2022-03-20 18:29:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2022-03-20 18:29:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 18:29:07,818 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:07,818 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:07,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 18:29:08,023 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 [2022-03-20 18:29:08,023 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:08,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1762727116, now seen corresponding path program 47 times [2022-03-20 18:29:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610478541] [2022-03-20 18:29:08,502 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:08,502 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:08,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1762727116, now seen corresponding path program 48 times [2022-03-20 18:29:08,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:08,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179426820] [2022-03-20 18:29:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:08,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:08,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:08,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:08,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179426820] [2022-03-20 18:29:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179426820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778046802] [2022-03-20 18:29:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:08,840 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) [2022-03-20 18:29:08,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:29:08,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 18:29:08,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:08,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-20 18:29:08,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:09,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:09,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778046802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:09,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:09,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 58 [2022-03-20 18:29:09,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610478541] [2022-03-20 18:29:09,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610478541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:09,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:09,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 18:29:09,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432036997] [2022-03-20 18:29:09,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:09,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:29:09,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:09,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:29:09,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1390, Invalid=1916, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:29:09,747 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) [2022-03-20 18:29:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:10,160 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 18:29:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:29:10,160 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 [2022-03-20 18:29:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:10,161 INFO L225 Difference]: With dead ends: 68 [2022-03-20 18:29:10,161 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 18:29:10,162 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2726, Invalid=4414, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 18:29:10,162 INFO L913 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 [2022-03-20 18:29:10,162 INFO L914 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] [2022-03-20 18:29:10,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 18:29:10,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 18:29:10,170 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) [2022-03-20 18:29:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2022-03-20 18:29:10,170 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 59 [2022-03-20 18:29:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:10,170 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2022-03-20 18:29:10,170 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) [2022-03-20 18:29:10,171 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2022-03-20 18:29:10,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 18:29:10,171 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:10,171 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:10,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 18:29:10,387 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 [2022-03-20 18:29:10,387 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:10,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash -663495440, now seen corresponding path program 49 times [2022-03-20 18:29:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:10,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989605474] [2022-03-20 18:29:10,683 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:10,684 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -663495440, now seen corresponding path program 50 times [2022-03-20 18:29:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736813341] [2022-03-20 18:29:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:10,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:11,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736813341] [2022-03-20 18:29:11,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736813341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:11,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398450465] [2022-03-20 18:29:11,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:11,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:11,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:11,030 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) [2022-03-20 18:29:11,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:29:11,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:11,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:11,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 18:29:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:11,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:11,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398450465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:11,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:11,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 18:29:11,959 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:11,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989605474] [2022-03-20 18:29:11,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989605474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:11,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:11,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:29:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371564429] [2022-03-20 18:29:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:11,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 18:29:11,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 18:29:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2043, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:29:11,961 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) [2022-03-20 18:29:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:12,368 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 18:29:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 18:29:12,369 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 [2022-03-20 18:29:12,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:12,370 INFO L225 Difference]: With dead ends: 70 [2022-03-20 18:29:12,370 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 18:29:12,371 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2938, Invalid=4718, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:29:12,371 INFO L913 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 [2022-03-20 18:29:12,371 INFO L914 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] [2022-03-20 18:29:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 18:29:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-03-20 18:29:12,380 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) [2022-03-20 18:29:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2022-03-20 18:29:12,380 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 61 [2022-03-20 18:29:12,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:12,381 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2022-03-20 18:29:12,381 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) [2022-03-20 18:29:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2022-03-20 18:29:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 18:29:12,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:12,381 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:12,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 18:29:12,603 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 [2022-03-20 18:29:12,603 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash -863809620, now seen corresponding path program 51 times [2022-03-20 18:29:12,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:12,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1116539479] [2022-03-20 18:29:13,062 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:13,063 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -863809620, now seen corresponding path program 52 times [2022-03-20 18:29:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106032471] [2022-03-20 18:29:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:13,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:13,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:13,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106032471] [2022-03-20 18:29:13,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106032471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803269567] [2022-03-20 18:29:13,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:13,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:13,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:13,446 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) [2022-03-20 18:29:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:29:13,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:13,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 18:29:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:13,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:14,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803269567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:14,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:14,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 18:29:14,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1116539479] [2022-03-20 18:29:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1116539479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:14,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 18:29:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798720536] [2022-03-20 18:29:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:14,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:29:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:29:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1608, Invalid=2174, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:29:14,493 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) [2022-03-20 18:29:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:14,931 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 18:29:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:29:14,931 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 [2022-03-20 18:29:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:14,932 INFO L225 Difference]: With dead ends: 72 [2022-03-20 18:29:14,932 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 18:29:14,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3158, Invalid=5032, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 18:29:14,936 INFO L913 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 [2022-03-20 18:29:14,937 INFO L914 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] [2022-03-20 18:29:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 18:29:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-20 18:29:14,951 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) [2022-03-20 18:29:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2022-03-20 18:29:14,951 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 63 [2022-03-20 18:29:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:14,951 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2022-03-20 18:29:14,952 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) [2022-03-20 18:29:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2022-03-20 18:29:14,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 18:29:14,953 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:14,953 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:14,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 18:29:15,167 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 [2022-03-20 18:29:15,167 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:15,168 INFO L85 PathProgramCache]: Analyzing trace with hash -92208280, now seen corresponding path program 53 times [2022-03-20 18:29:15,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:15,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594763091] [2022-03-20 18:29:15,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:15,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -92208280, now seen corresponding path program 54 times [2022-03-20 18:29:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:15,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873572377] [2022-03-20 18:29:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:15,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:15,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:15,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873572377] [2022-03-20 18:29:15,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873572377] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947208375] [2022-03-20 18:29:15,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:15,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:15,891 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) [2022-03-20 18:29:15,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:29:15,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 18:29:15,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 18:29:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:16,077 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:16,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947208375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:16,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:16,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2022-03-20 18:29:16,958 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594763091] [2022-03-20 18:29:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594763091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:16,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:16,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:29:16,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742597861] [2022-03-20 18:29:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:16,959 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 18:29:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 18:29:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1723, Invalid=2309, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:29:16,960 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) [2022-03-20 18:29:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:17,427 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 18:29:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 18:29:17,427 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 [2022-03-20 18:29:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:17,427 INFO L225 Difference]: With dead ends: 74 [2022-03-20 18:29:17,427 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 18:29:17,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3386, Invalid=5356, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:29:17,429 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 18:29:17,429 INFO L914 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] [2022-03-20 18:29:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 18:29:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-03-20 18:29:17,436 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) [2022-03-20 18:29:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2022-03-20 18:29:17,436 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 65 [2022-03-20 18:29:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:17,436 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2022-03-20 18:29:17,436 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) [2022-03-20 18:29:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2022-03-20 18:29:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 18:29:17,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:17,437 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:17,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 18:29:17,645 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 [2022-03-20 18:29:17,645 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1612662748, now seen corresponding path program 55 times [2022-03-20 18:29:17,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:17,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998326153] [2022-03-20 18:29:18,087 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:18,087 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1612662748, now seen corresponding path program 56 times [2022-03-20 18:29:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:18,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874563862] [2022-03-20 18:29:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:18,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:18,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874563862] [2022-03-20 18:29:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874563862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435228137] [2022-03-20 18:29:18,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:18,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:18,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:18,461 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) [2022-03-20 18:29:18,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:29:18,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:18,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:18,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 18:29:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:18,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:19,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435228137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:19,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:19,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 18:29:19,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:19,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998326153] [2022-03-20 18:29:19,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998326153] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:19,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:19,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 18:29:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318633864] [2022-03-20 18:29:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:19,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:29:19,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:29:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1842, Invalid=2448, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:29:19,551 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) [2022-03-20 18:29:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:20,082 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 18:29:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:29:20,082 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 [2022-03-20 18:29:20,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:20,083 INFO L225 Difference]: With dead ends: 76 [2022-03-20 18:29:20,083 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 18:29:20,084 INFO L912 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 [2022-03-20 18:29:20,084 INFO L913 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 [2022-03-20 18:29:20,084 INFO L914 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] [2022-03-20 18:29:20,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 18:29:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-03-20 18:29:20,094 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) [2022-03-20 18:29:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2022-03-20 18:29:20,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 67 [2022-03-20 18:29:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:20,095 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2022-03-20 18:29:20,095 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) [2022-03-20 18:29:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2022-03-20 18:29:20,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 18:29:20,096 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:20,096 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:20,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 18:29:20,299 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 [2022-03-20 18:29:20,299 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1814441440, now seen corresponding path program 57 times [2022-03-20 18:29:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664911612] [2022-03-20 18:29:20,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:20,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:20,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1814441440, now seen corresponding path program 58 times [2022-03-20 18:29:20,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:20,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13028336] [2022-03-20 18:29:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:20,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:21,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13028336] [2022-03-20 18:29:21,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13028336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:21,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591878285] [2022-03-20 18:29:21,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:21,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:21,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:21,348 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) [2022-03-20 18:29:21,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:29:21,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:21,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:21,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 18:29:21,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:21,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:22,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591878285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:22,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:22,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 18:29:22,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:22,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664911612] [2022-03-20 18:29:22,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664911612] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:22,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:22,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:29:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586577612] [2022-03-20 18:29:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:22,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 18:29:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 18:29:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1965, Invalid=2591, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:29:22,506 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) [2022-03-20 18:29:23,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:23,026 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 18:29:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 18:29:23,027 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 [2022-03-20 18:29:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:23,027 INFO L225 Difference]: With dead ends: 78 [2022-03-20 18:29:23,027 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 18:29:23,028 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3866, Invalid=6034, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:29:23,028 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 18:29:23,028 INFO L914 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] [2022-03-20 18:29:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 18:29:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-03-20 18:29:23,039 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) [2022-03-20 18:29:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2022-03-20 18:29:23,040 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 69 [2022-03-20 18:29:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:23,040 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2022-03-20 18:29:23,040 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) [2022-03-20 18:29:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2022-03-20 18:29:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 18:29:23,041 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:23,041 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:23,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-20 18:29:23,263 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 [2022-03-20 18:29:23,264 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:23,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:23,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1021650076, now seen corresponding path program 59 times [2022-03-20 18:29:23,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:23,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026293527] [2022-03-20 18:29:23,614 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:23,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1021650076, now seen corresponding path program 60 times [2022-03-20 18:29:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542237296] [2022-03-20 18:29:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:24,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542237296] [2022-03-20 18:29:24,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542237296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737833180] [2022-03-20 18:29:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:24,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:24,093 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) [2022-03-20 18:29:24,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:29:24,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 18:29:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 18:29:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:24,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:25,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737833180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:25,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:25,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 18:29:25,449 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:25,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026293527] [2022-03-20 18:29:25,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026293527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:25,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:25,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 18:29:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209985187] [2022-03-20 18:29:25,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:25,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:29:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:29:25,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2092, Invalid=2738, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:29:25,451 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) [2022-03-20 18:29:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:26,039 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 18:29:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:29:26,040 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 [2022-03-20 18:29:26,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:26,040 INFO L225 Difference]: With dead ends: 80 [2022-03-20 18:29:26,040 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 18:29:26,041 INFO L912 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 [2022-03-20 18:29:26,042 INFO L913 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 [2022-03-20 18:29:26,042 INFO L914 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] [2022-03-20 18:29:26,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 18:29:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-03-20 18:29:26,054 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) [2022-03-20 18:29:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2022-03-20 18:29:26,054 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 71 [2022-03-20 18:29:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:26,054 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2022-03-20 18:29:26,054 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) [2022-03-20 18:29:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2022-03-20 18:29:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 18:29:26,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:26,055 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:26,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-20 18:29:26,255 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 [2022-03-20 18:29:26,255 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash -641639336, now seen corresponding path program 61 times [2022-03-20 18:29:26,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:26,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804018546] [2022-03-20 18:29:26,809 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:26,809 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash -641639336, now seen corresponding path program 62 times [2022-03-20 18:29:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:26,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406470436] [2022-03-20 18:29:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:26,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:27,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406470436] [2022-03-20 18:29:27,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406470436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:27,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973590276] [2022-03-20 18:29:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:27,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:27,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:27,315 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) [2022-03-20 18:29:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:29:27,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:27,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:27,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 18:29:27,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:27,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973590276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:28,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:28,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 18:29:28,664 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804018546] [2022-03-20 18:29:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804018546] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:28,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:28,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:29:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825017989] [2022-03-20 18:29:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:28,665 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 18:29:28,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 18:29:28,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2223, Invalid=2889, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:29:28,666 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) [2022-03-20 18:29:29,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:29,248 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 18:29:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 18:29:29,248 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 [2022-03-20 18:29:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:29,249 INFO L225 Difference]: With dead ends: 82 [2022-03-20 18:29:29,249 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 18:29:29,250 INFO L912 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 [2022-03-20 18:29:29,250 INFO L913 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 [2022-03-20 18:29:29,250 INFO L914 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] [2022-03-20 18:29:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 18:29:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-03-20 18:29:29,258 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) [2022-03-20 18:29:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2022-03-20 18:29:29,259 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 73 [2022-03-20 18:29:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:29,259 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2022-03-20 18:29:29,259 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) [2022-03-20 18:29:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2022-03-20 18:29:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 18:29:29,259 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:29,259 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:29,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 18:29:29,460 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 [2022-03-20 18:29:29,460 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1334930156, now seen corresponding path program 63 times [2022-03-20 18:29:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:29,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [751236020] [2022-03-20 18:29:29,907 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:29,907 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1334930156, now seen corresponding path program 64 times [2022-03-20 18:29:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:29,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57073212] [2022-03-20 18:29:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:29,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:30,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:30,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57073212] [2022-03-20 18:29:30,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57073212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475147263] [2022-03-20 18:29:30,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:30,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:30,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:30,432 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) [2022-03-20 18:29:30,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:29:30,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:30,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:30,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 18:29:30,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:30,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:31,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:31,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475147263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:31,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:31,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 18:29:31,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:31,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [751236020] [2022-03-20 18:29:31,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [751236020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:31,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:31,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 18:29:31,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749939122] [2022-03-20 18:29:31,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:31,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:29:31,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:31,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:29:31,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2358, Invalid=3044, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:29:31,784 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) [2022-03-20 18:29:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:32,360 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 18:29:32,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:29:32,361 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 [2022-03-20 18:29:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:32,361 INFO L225 Difference]: With dead ends: 84 [2022-03-20 18:29:32,361 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 18:29:32,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4646, Invalid=7126, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 18:29:32,363 INFO L913 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 [2022-03-20 18:29:32,363 INFO L914 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] [2022-03-20 18:29:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 18:29:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-20 18:29:32,378 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) [2022-03-20 18:29:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2022-03-20 18:29:32,378 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 75 [2022-03-20 18:29:32,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:32,378 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2022-03-20 18:29:32,378 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) [2022-03-20 18:29:32,378 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2022-03-20 18:29:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 18:29:32,379 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:32,379 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:32,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 18:29:32,579 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 [2022-03-20 18:29:32,579 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:32,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1867477296, now seen corresponding path program 65 times [2022-03-20 18:29:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:32,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1456647034] [2022-03-20 18:29:32,960 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:32,960 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:32,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1867477296, now seen corresponding path program 66 times [2022-03-20 18:29:32,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:32,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467652015] [2022-03-20 18:29:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:32,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:33,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:33,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467652015] [2022-03-20 18:29:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467652015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211587002] [2022-03-20 18:29:33,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:33,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:33,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:33,524 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) [2022-03-20 18:29:33,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:29:33,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 18:29:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 18:29:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:33,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:35,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211587002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:35,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:35,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 76 [2022-03-20 18:29:35,068 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:35,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1456647034] [2022-03-20 18:29:35,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1456647034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:35,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:35,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:29:35,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347533046] [2022-03-20 18:29:35,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:35,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 18:29:35,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:35,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 18:29:35,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2497, Invalid=3203, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:29:35,070 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) [2022-03-20 18:29:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:35,704 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 18:29:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 18:29:35,705 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 [2022-03-20 18:29:35,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:35,705 INFO L225 Difference]: With dead ends: 86 [2022-03-20 18:29:35,705 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 18:29:35,707 INFO L912 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 [2022-03-20 18:29:35,707 INFO L913 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 [2022-03-20 18:29:35,707 INFO L914 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] [2022-03-20 18:29:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 18:29:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-03-20 18:29:35,717 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) [2022-03-20 18:29:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2022-03-20 18:29:35,717 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 77 [2022-03-20 18:29:35,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:35,718 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2022-03-20 18:29:35,718 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) [2022-03-20 18:29:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2022-03-20 18:29:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 18:29:35,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:35,718 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:35,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 18:29:35,918 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 [2022-03-20 18:29:35,919 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:35,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1750796684, now seen corresponding path program 67 times [2022-03-20 18:29:35,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:35,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1745230264] [2022-03-20 18:29:36,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:36,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1750796684, now seen corresponding path program 68 times [2022-03-20 18:29:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:36,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147081641] [2022-03-20 18:29:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:36,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:36,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147081641] [2022-03-20 18:29:36,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147081641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754945143] [2022-03-20 18:29:36,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:36,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:36,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:36,959 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) [2022-03-20 18:29:36,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 18:29:37,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 18:29:37,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:37,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:38,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754945143] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:38,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:38,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 18:29:38,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:38,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1745230264] [2022-03-20 18:29:38,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1745230264] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:38,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:38,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 18:29:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340899181] [2022-03-20 18:29:38,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:38,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:29:38,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:38,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:29:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2640, Invalid=3366, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:29:38,489 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) [2022-03-20 18:29:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:39,131 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 18:29:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:29:39,132 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 [2022-03-20 18:29:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:39,132 INFO L225 Difference]: With dead ends: 88 [2022-03-20 18:29:39,132 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 18:29:39,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5206, Invalid=7904, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 18:29:39,134 INFO L913 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 [2022-03-20 18:29:39,134 INFO L914 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] [2022-03-20 18:29:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 18:29:39,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-03-20 18:29:39,143 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) [2022-03-20 18:29:39,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2022-03-20 18:29:39,143 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 79 [2022-03-20 18:29:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:39,143 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2022-03-20 18:29:39,143 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) [2022-03-20 18:29:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2022-03-20 18:29:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 18:29:39,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:39,144 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:39,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 18:29:39,344 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 [2022-03-20 18:29:39,345 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:39,345 INFO L85 PathProgramCache]: Analyzing trace with hash -11418296, now seen corresponding path program 69 times [2022-03-20 18:29:39,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:39,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1094112495] [2022-03-20 18:29:39,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:39,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash -11418296, now seen corresponding path program 70 times [2022-03-20 18:29:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901974334] [2022-03-20 18:29:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:40,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901974334] [2022-03-20 18:29:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901974334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:40,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813547366] [2022-03-20 18:29:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:40,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:40,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:40,234 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) [2022-03-20 18:29:40,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 18:29:40,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 18:29:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:40,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813547366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:41,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:41,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 18:29:41,793 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:41,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1094112495] [2022-03-20 18:29:41,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1094112495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:41,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:41,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:29:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017726716] [2022-03-20 18:29:41,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:41,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 18:29:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:41,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 18:29:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2787, Invalid=3533, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:29:41,798 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) [2022-03-20 18:29:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:42,465 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 18:29:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 18:29:42,466 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 [2022-03-20 18:29:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:42,466 INFO L225 Difference]: With dead ends: 90 [2022-03-20 18:29:42,466 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 18:29:42,467 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5498, Invalid=8308, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:29:42,468 INFO L913 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 [2022-03-20 18:29:42,468 INFO L914 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] [2022-03-20 18:29:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 18:29:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-03-20 18:29:42,478 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) [2022-03-20 18:29:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2022-03-20 18:29:42,478 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 81 [2022-03-20 18:29:42,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:42,479 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2022-03-20 18:29:42,479 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) [2022-03-20 18:29:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2022-03-20 18:29:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 18:29:42,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:42,479 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:42,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 18:29:42,680 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 [2022-03-20 18:29:42,680 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1282899452, now seen corresponding path program 71 times [2022-03-20 18:29:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:42,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1175228778] [2022-03-20 18:29:42,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:42,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:42,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1282899452, now seen corresponding path program 72 times [2022-03-20 18:29:42,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:42,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513950157] [2022-03-20 18:29:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:43,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:43,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513950157] [2022-03-20 18:29:43,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513950157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:43,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763922109] [2022-03-20 18:29:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:43,553 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) [2022-03-20 18:29:43,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 18:29:43,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 18:29:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 18:29:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:43,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763922109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:45,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:45,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 82 [2022-03-20 18:29:45,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:45,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1175228778] [2022-03-20 18:29:45,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1175228778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:45,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:45,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 18:29:45,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653696846] [2022-03-20 18:29:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:45,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:29:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:29:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2938, Invalid=3704, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:29:45,186 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) [2022-03-20 18:29:45,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:45,891 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 18:29:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:29:45,891 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 [2022-03-20 18:29:45,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:45,892 INFO L225 Difference]: With dead ends: 92 [2022-03-20 18:29:45,892 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 18:29:45,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5798, Invalid=8722, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 18:29:45,894 INFO L913 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 [2022-03-20 18:29:45,894 INFO L914 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] [2022-03-20 18:29:45,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 18:29:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-03-20 18:29:45,904 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) [2022-03-20 18:29:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2022-03-20 18:29:45,905 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 83 [2022-03-20 18:29:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:45,905 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2022-03-20 18:29:45,905 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) [2022-03-20 18:29:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2022-03-20 18:29:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 18:29:45,905 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:45,905 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:45,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 18:29:46,106 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 [2022-03-20 18:29:46,106 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 889388992, now seen corresponding path program 73 times [2022-03-20 18:29:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:46,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531180584] [2022-03-20 18:29:46,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:46,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 889388992, now seen corresponding path program 74 times [2022-03-20 18:29:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26311026] [2022-03-20 18:29:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:47,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:47,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:47,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:47,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26311026] [2022-03-20 18:29:47,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26311026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:47,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555792471] [2022-03-20 18:29:47,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:47,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:47,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:47,181 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) [2022-03-20 18:29:47,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 18:29:47,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:47,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:47,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 18:29:47,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:48,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555792471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:48,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:48,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 18:29:48,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:48,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531180584] [2022-03-20 18:29:48,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531180584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:48,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:48,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:29:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612792707] [2022-03-20 18:29:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:48,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 18:29:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:48,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 18:29:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3093, Invalid=3879, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:29:48,862 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) [2022-03-20 18:29:49,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:49,665 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 18:29:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 18:29:49,666 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 [2022-03-20 18:29:49,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:49,666 INFO L225 Difference]: With dead ends: 94 [2022-03-20 18:29:49,666 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 18:29:49,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6106, Invalid=9146, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:29:49,668 INFO L913 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 [2022-03-20 18:29:49,668 INFO L914 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] [2022-03-20 18:29:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 18:29:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-03-20 18:29:49,681 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) [2022-03-20 18:29:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2022-03-20 18:29:49,681 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 85 [2022-03-20 18:29:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:49,682 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2022-03-20 18:29:49,682 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) [2022-03-20 18:29:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2022-03-20 18:29:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 18:29:49,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:49,682 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:49,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 18:29:49,883 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 [2022-03-20 18:29:49,883 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1104477820, now seen corresponding path program 75 times [2022-03-20 18:29:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:49,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1548058999] [2022-03-20 18:29:50,266 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:50,266 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1104477820, now seen corresponding path program 76 times [2022-03-20 18:29:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520110196] [2022-03-20 18:29:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:50,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:50,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:50,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520110196] [2022-03-20 18:29:50,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520110196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:50,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46869634] [2022-03-20 18:29:50,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:29:50,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:50,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:50,872 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) [2022-03-20 18:29:50,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 18:29:50,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:29:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 18:29:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46869634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:52,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:52,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 18:29:52,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1548058999] [2022-03-20 18:29:52,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1548058999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:52,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:52,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 18:29:52,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13445655] [2022-03-20 18:29:52,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:52,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:29:52,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:52,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:29:52,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=4058, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:29:52,629 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) [2022-03-20 18:29:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:53,391 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 18:29:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:29:53,391 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 [2022-03-20 18:29:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:53,392 INFO L225 Difference]: With dead ends: 96 [2022-03-20 18:29:53,392 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 18:29:53,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6422, Invalid=9580, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 18:29:53,393 INFO L913 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 [2022-03-20 18:29:53,394 INFO L914 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] [2022-03-20 18:29:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 18:29:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-03-20 18:29:53,404 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) [2022-03-20 18:29:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2022-03-20 18:29:53,405 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 87 [2022-03-20 18:29:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:53,405 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2022-03-20 18:29:53,405 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) [2022-03-20 18:29:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2022-03-20 18:29:53,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 18:29:53,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:53,405 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:53,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 18:29:53,606 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 [2022-03-20 18:29:53,606 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:53,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:53,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1646411320, now seen corresponding path program 77 times [2022-03-20 18:29:53,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:53,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1314814708] [2022-03-20 18:29:54,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:54,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1646411320, now seen corresponding path program 78 times [2022-03-20 18:29:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:54,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867670118] [2022-03-20 18:29:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:54,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:54,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:54,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867670118] [2022-03-20 18:29:54,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867670118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517610838] [2022-03-20 18:29:54,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:29:54,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:54,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:54,677 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) [2022-03-20 18:29:54,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 18:29:54,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 18:29:54,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 18:29:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:54,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:29:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:56,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517610838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:29:56,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:29:56,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 88 [2022-03-20 18:29:56,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:29:56,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1314814708] [2022-03-20 18:29:56,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1314814708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:29:56,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:29:56,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:29:56,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914877942] [2022-03-20 18:29:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:29:56,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 18:29:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 18:29:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3415, Invalid=4241, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:29:56,544 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) [2022-03-20 18:29:57,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:29:57,375 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 18:29:57,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 18:29:57,375 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 [2022-03-20 18:29:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:29:57,376 INFO L225 Difference]: With dead ends: 98 [2022-03-20 18:29:57,376 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 18:29:57,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6746, Invalid=10024, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:29:57,378 INFO L913 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 [2022-03-20 18:29:57,378 INFO L914 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] [2022-03-20 18:29:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 18:29:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-03-20 18:29:57,395 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) [2022-03-20 18:29:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2022-03-20 18:29:57,396 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 89 [2022-03-20 18:29:57,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:29:57,396 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2022-03-20 18:29:57,396 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) [2022-03-20 18:29:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2022-03-20 18:29:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 18:29:57,396 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:29:57,396 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:29:57,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 18:29:57,597 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 [2022-03-20 18:29:57,597 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:29:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:29:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1541505292, now seen corresponding path program 79 times [2022-03-20 18:29:57,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:29:57,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918915988] [2022-03-20 18:29:57,991 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:29:57,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:29:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1541505292, now seen corresponding path program 80 times [2022-03-20 18:29:57,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:29:57,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288272592] [2022-03-20 18:29:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:29:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:29:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:58,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:29:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:29:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:29:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288272592] [2022-03-20 18:29:58,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288272592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:29:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686483518] [2022-03-20 18:29:58,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:29:58,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:29:58,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:29:58,650 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) [2022-03-20 18:29:58,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 18:29:58,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:29:58,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:29:58,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 18:29:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:29:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:29:58,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:00,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686483518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:00,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:00,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 18:30:00,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:00,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918915988] [2022-03-20 18:30:00,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918915988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:00,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:00,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 18:30:00,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535648101] [2022-03-20 18:30:00,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:00,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:30:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:30:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3582, Invalid=4428, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:30:00,591 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) [2022-03-20 18:30:01,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:01,462 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 18:30:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:30:01,462 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 [2022-03-20 18:30:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:01,462 INFO L225 Difference]: With dead ends: 100 [2022-03-20 18:30:01,463 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 18:30:01,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7078, Invalid=10478, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 18:30:01,464 INFO L913 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 [2022-03-20 18:30:01,464 INFO L914 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] [2022-03-20 18:30:01,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 18:30:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-03-20 18:30:01,480 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) [2022-03-20 18:30:01,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2022-03-20 18:30:01,481 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 91 [2022-03-20 18:30:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:01,481 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2022-03-20 18:30:01,481 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) [2022-03-20 18:30:01,481 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2022-03-20 18:30:01,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 18:30:01,481 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:01,481 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:01,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 18:30:01,682 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 [2022-03-20 18:30:01,683 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:01,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:01,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1477279920, now seen corresponding path program 81 times [2022-03-20 18:30:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:01,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [254407302] [2022-03-20 18:30:02,076 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:02,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:02,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1477279920, now seen corresponding path program 82 times [2022-03-20 18:30:02,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:02,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999820530] [2022-03-20 18:30:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:02,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:02,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:02,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:02,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999820530] [2022-03-20 18:30:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999820530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651377915] [2022-03-20 18:30:02,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:30:02,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:02,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:02,858 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) [2022-03-20 18:30:02,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 18:30:02,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:30:02,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:02,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 18:30:02,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:03,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:04,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651377915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:04,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 18:30:04,927 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:04,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [254407302] [2022-03-20 18:30:04,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [254407302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:04,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:04,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:30:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496722953] [2022-03-20 18:30:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:04,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 18:30:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 18:30:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3753, Invalid=4619, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:30:04,929 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) [2022-03-20 18:30:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:05,795 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 18:30:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 18:30:05,796 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 [2022-03-20 18:30:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:05,796 INFO L225 Difference]: With dead ends: 102 [2022-03-20 18:30:05,796 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 18:30:05,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7418, Invalid=10942, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:30:05,798 INFO L913 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 [2022-03-20 18:30:05,798 INFO L914 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] [2022-03-20 18:30:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 18:30:05,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-03-20 18:30:05,814 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) [2022-03-20 18:30:05,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-03-20 18:30:05,814 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 93 [2022-03-20 18:30:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:05,815 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-03-20 18:30:05,815 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) [2022-03-20 18:30:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-03-20 18:30:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 18:30:05,815 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:05,815 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:05,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:06,031 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 [2022-03-20 18:30:06,031 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -868023444, now seen corresponding path program 83 times [2022-03-20 18:30:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:06,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024390997] [2022-03-20 18:30:06,647 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:06,647 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash -868023444, now seen corresponding path program 84 times [2022-03-20 18:30:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:06,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740580461] [2022-03-20 18:30:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:06,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:07,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:07,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740580461] [2022-03-20 18:30:07,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740580461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:07,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324113077] [2022-03-20 18:30:07,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:30:07,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:07,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:07,397 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) [2022-03-20 18:30:07,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 18:30:07,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 18:30:07,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-20 18:30:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:07,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:09,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324113077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:09,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:09,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 94 [2022-03-20 18:30:09,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:09,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024390997] [2022-03-20 18:30:09,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024390997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:09,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:09,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 18:30:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923740993] [2022-03-20 18:30:09,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:09,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:30:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:30:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4814, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:30:09,489 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) [2022-03-20 18:30:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:10,420 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 18:30:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:30:10,422 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 [2022-03-20 18:30:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:10,422 INFO L225 Difference]: With dead ends: 104 [2022-03-20 18:30:10,422 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 18:30:10,424 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7766, Invalid=11416, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 18:30:10,424 INFO L913 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 [2022-03-20 18:30:10,424 INFO L914 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] [2022-03-20 18:30:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 18:30:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-03-20 18:30:10,442 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) [2022-03-20 18:30:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2022-03-20 18:30:10,442 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 95 [2022-03-20 18:30:10,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:10,442 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2022-03-20 18:30:10,443 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) [2022-03-20 18:30:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2022-03-20 18:30:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 18:30:10,443 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:10,443 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:10,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:10,666 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 [2022-03-20 18:30:10,667 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:10,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash 153274152, now seen corresponding path program 85 times [2022-03-20 18:30:10,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:10,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1388831479] [2022-03-20 18:30:11,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:11,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash 153274152, now seen corresponding path program 86 times [2022-03-20 18:30:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:11,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251152416] [2022-03-20 18:30:11,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:11,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:12,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:12,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251152416] [2022-03-20 18:30:12,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251152416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:12,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472952422] [2022-03-20 18:30:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:30:12,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:12,057 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) [2022-03-20 18:30:12,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 18:30:12,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:30:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 18:30:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:12,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:14,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472952422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:14,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:14,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 18:30:14,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:14,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1388831479] [2022-03-20 18:30:14,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1388831479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:14,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:14,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:30:14,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805730857] [2022-03-20 18:30:14,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:14,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 18:30:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 18:30:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4107, Invalid=5013, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:30:14,211 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) [2022-03-20 18:30:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:15,157 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 18:30:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 18:30:15,157 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 [2022-03-20 18:30:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:15,157 INFO L225 Difference]: With dead ends: 106 [2022-03-20 18:30:15,158 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 18:30:15,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8122, Invalid=11900, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:30:15,160 INFO L913 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 [2022-03-20 18:30:15,160 INFO L914 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] [2022-03-20 18:30:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 18:30:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-03-20 18:30:15,173 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) [2022-03-20 18:30:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2022-03-20 18:30:15,173 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 97 [2022-03-20 18:30:15,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:15,174 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2022-03-20 18:30:15,174 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) [2022-03-20 18:30:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2022-03-20 18:30:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 18:30:15,174 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:15,174 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:15,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 18:30:15,374 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 [2022-03-20 18:30:15,375 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:15,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:15,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1927246876, now seen corresponding path program 87 times [2022-03-20 18:30:15,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:15,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1338873053] [2022-03-20 18:30:15,814 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:15,814 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:15,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1927246876, now seen corresponding path program 88 times [2022-03-20 18:30:15,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:15,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568502756] [2022-03-20 18:30:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:15,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:16,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:16,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568502756] [2022-03-20 18:30:16,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568502756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:16,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622683657] [2022-03-20 18:30:16,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:30:16,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:16,576 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) [2022-03-20 18:30:16,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 18:30:16,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:30:16,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:16,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 18:30:16,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:16,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:18,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622683657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:18,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:18,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 18:30:18,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1338873053] [2022-03-20 18:30:18,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1338873053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:18,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:18,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 18:30:18,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049805846] [2022-03-20 18:30:18,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:18,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:30:18,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:18,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:30:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=5216, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:30:18,895 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) [2022-03-20 18:30:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:19,917 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 18:30:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:30:19,917 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 [2022-03-20 18:30:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:19,918 INFO L225 Difference]: With dead ends: 108 [2022-03-20 18:30:19,918 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 18:30:19,919 INFO L912 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 [2022-03-20 18:30:19,919 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:19,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 38 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:30:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 18:30:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-03-20 18:30:19,941 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) [2022-03-20 18:30:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2022-03-20 18:30:19,941 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 99 [2022-03-20 18:30:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:19,941 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2022-03-20 18:30:19,941 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) [2022-03-20 18:30:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2022-03-20 18:30:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 18:30:19,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:19,942 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:19,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 18:30:20,143 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 [2022-03-20 18:30:20,143 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 146805152, now seen corresponding path program 89 times [2022-03-20 18:30:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794547827] [2022-03-20 18:30:20,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:20,546 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:20,546 INFO L85 PathProgramCache]: Analyzing trace with hash 146805152, now seen corresponding path program 90 times [2022-03-20 18:30:20,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:20,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335685709] [2022-03-20 18:30:20,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:20,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:21,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:21,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335685709] [2022-03-20 18:30:21,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335685709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:21,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936705372] [2022-03-20 18:30:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:30:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:21,335 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) [2022-03-20 18:30:21,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 18:30:21,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 18:30:21,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 18:30:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:21,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936705372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:23,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 100 [2022-03-20 18:30:23,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:23,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794547827] [2022-03-20 18:30:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794547827] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:23,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:23,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:30:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697473989] [2022-03-20 18:30:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:23,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 18:30:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 18:30:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4477, Invalid=5423, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:30:23,723 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) [2022-03-20 18:30:24,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:24,770 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 18:30:24,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 18:30:24,771 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 [2022-03-20 18:30:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:24,771 INFO L225 Difference]: With dead ends: 110 [2022-03-20 18:30:24,771 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 18:30:24,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8858, Invalid=12898, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 18:30:24,773 INFO L913 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 [2022-03-20 18:30:24,773 INFO L914 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] [2022-03-20 18:30:24,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 18:30:24,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-03-20 18:30:24,795 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) [2022-03-20 18:30:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2022-03-20 18:30:24,796 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 101 [2022-03-20 18:30:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:24,796 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2022-03-20 18:30:24,796 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) [2022-03-20 18:30:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2022-03-20 18:30:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 18:30:24,797 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:24,797 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:24,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 18:30:25,015 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 [2022-03-20 18:30:25,015 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:25,016 INFO L85 PathProgramCache]: Analyzing trace with hash 445978716, now seen corresponding path program 91 times [2022-03-20 18:30:25,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:25,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644274976] [2022-03-20 18:30:25,419 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:25,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash 445978716, now seen corresponding path program 92 times [2022-03-20 18:30:25,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:25,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584640745] [2022-03-20 18:30:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:25,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:26,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584640745] [2022-03-20 18:30:26,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584640745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:26,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116249166] [2022-03-20 18:30:26,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:30:26,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:26,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:26,255 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) [2022-03-20 18:30:26,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 18:30:26,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:30:26,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 18:30:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:26,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:28,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116249166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:28,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:28,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 18:30:28,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644274976] [2022-03-20 18:30:28,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644274976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:28,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:28,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 18:30:28,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12614523] [2022-03-20 18:30:28,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:28,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:30:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:30:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 18:30:28,700 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) [2022-03-20 18:30:29,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:29,885 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 18:30:29,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:30:29,885 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 [2022-03-20 18:30:29,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:29,886 INFO L225 Difference]: With dead ends: 112 [2022-03-20 18:30:29,886 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 18:30:29,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9238, Invalid=13412, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 18:30:29,887 INFO L913 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 [2022-03-20 18:30:29,887 INFO L914 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] [2022-03-20 18:30:29,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 18:30:29,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-20 18:30:29,912 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) [2022-03-20 18:30:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2022-03-20 18:30:29,912 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 103 [2022-03-20 18:30:29,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:29,912 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2022-03-20 18:30:29,913 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) [2022-03-20 18:30:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2022-03-20 18:30:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 18:30:29,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:29,913 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:29,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-20 18:30:30,137 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 [2022-03-20 18:30:30,138 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:30,138 INFO L85 PathProgramCache]: Analyzing trace with hash 188964888, now seen corresponding path program 93 times [2022-03-20 18:30:30,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:30,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670843751] [2022-03-20 18:30:30,466 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:30,466 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 188964888, now seen corresponding path program 94 times [2022-03-20 18:30:30,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:30,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310957093] [2022-03-20 18:30:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:31,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:31,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:31,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310957093] [2022-03-20 18:30:31,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310957093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:31,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673389800] [2022-03-20 18:30:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:30:31,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:31,364 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) [2022-03-20 18:30:31,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 18:30:31,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:30:31,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:31,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 18:30:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:31,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:33,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673389800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:33,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:33,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 18:30:33,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:33,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670843751] [2022-03-20 18:30:33,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670843751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:33,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:33,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:30:33,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154955657] [2022-03-20 18:30:33,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:33,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 18:30:33,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:33,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 18:30:33,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4863, Invalid=5849, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 18:30:33,920 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) [2022-03-20 18:30:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:35,039 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 18:30:35,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 18:30:35,040 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 [2022-03-20 18:30:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:35,041 INFO L225 Difference]: With dead ends: 114 [2022-03-20 18:30:35,041 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 18:30:35,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9626, Invalid=13936, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 18:30:35,043 INFO L913 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 [2022-03-20 18:30:35,043 INFO L914 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] [2022-03-20 18:30:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 18:30:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-03-20 18:30:35,067 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) [2022-03-20 18:30:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2022-03-20 18:30:35,068 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 105 [2022-03-20 18:30:35,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:35,068 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2022-03-20 18:30:35,068 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) [2022-03-20 18:30:35,068 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2022-03-20 18:30:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 18:30:35,069 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:35,069 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:35,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 18:30:35,283 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 [2022-03-20 18:30:35,283 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1988187948, now seen corresponding path program 95 times [2022-03-20 18:30:35,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:35,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000814750] [2022-03-20 18:30:35,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:35,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1988187948, now seen corresponding path program 96 times [2022-03-20 18:30:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:35,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793102809] [2022-03-20 18:30:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:36,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:36,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793102809] [2022-03-20 18:30:36,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793102809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93927247] [2022-03-20 18:30:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:30:36,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:36,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:36,741 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) [2022-03-20 18:30:36,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 18:30:36,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-20 18:30:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:36,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-20 18:30:36,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:37,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:39,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93927247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:39,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:39,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-03-20 18:30:39,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:39,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000814750] [2022-03-20 18:30:39,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000814750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:39,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:39,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 18:30:39,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316578194] [2022-03-20 18:30:39,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:39,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:30:39,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:39,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:30:39,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5062, Invalid=6068, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 18:30:39,408 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) [2022-03-20 18:30:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:40,562 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 18:30:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:30:40,562 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 [2022-03-20 18:30:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:40,563 INFO L225 Difference]: With dead ends: 116 [2022-03-20 18:30:40,563 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 18:30:40,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10022, Invalid=14470, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 18:30:40,564 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:40,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 43 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:30:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 18:30:40,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-03-20 18:30:40,589 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) [2022-03-20 18:30:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2022-03-20 18:30:40,590 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 107 [2022-03-20 18:30:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:40,590 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2022-03-20 18:30:40,590 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) [2022-03-20 18:30:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2022-03-20 18:30:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 18:30:40,590 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:40,591 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:40,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 18:30:40,803 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 [2022-03-20 18:30:40,803 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1711977104, now seen corresponding path program 97 times [2022-03-20 18:30:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:40,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1767991889] [2022-03-20 18:30:41,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:41,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1711977104, now seen corresponding path program 98 times [2022-03-20 18:30:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:41,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035166534] [2022-03-20 18:30:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:41,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:42,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035166534] [2022-03-20 18:30:42,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035166534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132904482] [2022-03-20 18:30:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:30:42,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:42,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:42,162 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) [2022-03-20 18:30:42,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 18:30:42,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:30:42,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 18:30:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:42,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:44,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132904482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:44,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:44,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 18:30:44,929 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:44,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1767991889] [2022-03-20 18:30:44,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1767991889] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:44,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:44,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:30:44,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822653616] [2022-03-20 18:30:44,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:44,930 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 18:30:44,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 18:30:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5265, Invalid=6291, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 18:30:44,931 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) [2022-03-20 18:30:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:46,122 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 18:30:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 18:30:46,123 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 [2022-03-20 18:30:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:46,124 INFO L225 Difference]: With dead ends: 118 [2022-03-20 18:30:46,124 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 18:30:46,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2172 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=10426, Invalid=15014, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 18:30:46,126 INFO L913 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 [2022-03-20 18:30:46,126 INFO L914 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] [2022-03-20 18:30:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 18:30:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-03-20 18:30:46,145 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) [2022-03-20 18:30:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2022-03-20 18:30:46,145 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 109 [2022-03-20 18:30:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:46,146 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2022-03-20 18:30:46,146 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) [2022-03-20 18:30:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2022-03-20 18:30:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 18:30:46,146 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:46,146 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:46,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-20 18:30:46,347 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 [2022-03-20 18:30:46,347 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:46,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:46,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1337670988, now seen corresponding path program 99 times [2022-03-20 18:30:46,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:46,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1343884236] [2022-03-20 18:30:46,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:46,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1337670988, now seen corresponding path program 100 times [2022-03-20 18:30:46,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:46,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151740396] [2022-03-20 18:30:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:46,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:47,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:47,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:47,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151740396] [2022-03-20 18:30:47,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151740396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:47,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677531673] [2022-03-20 18:30:47,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:30:47,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:47,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:47,701 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) [2022-03-20 18:30:47,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 18:30:47,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:30:47,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 18:30:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:48,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:50,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677531673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:50,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:50,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 18:30:50,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:50,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1343884236] [2022-03-20 18:30:50,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1343884236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:50,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:50,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 18:30:50,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700301546] [2022-03-20 18:30:50,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:50,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:30:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:50,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:30:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5472, Invalid=6518, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 18:30:50,605 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) [2022-03-20 18:30:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:51,828 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 18:30:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:30:51,828 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 [2022-03-20 18:30:51,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:51,829 INFO L225 Difference]: With dead ends: 120 [2022-03-20 18:30:51,829 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 18:30:51,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10838, Invalid=15568, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 18:30:51,832 INFO L913 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:51,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 63 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 18:30:51,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 18:30:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-03-20 18:30:51,856 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) [2022-03-20 18:30:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2022-03-20 18:30:51,857 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 111 [2022-03-20 18:30:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:51,857 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2022-03-20 18:30:51,857 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) [2022-03-20 18:30:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2022-03-20 18:30:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 18:30:51,858 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:51,858 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:51,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 18:30:52,058 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 [2022-03-20 18:30:52,058 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1888220920, now seen corresponding path program 101 times [2022-03-20 18:30:52,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:52,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182635645] [2022-03-20 18:30:52,628 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:52,628 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:52,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1888220920, now seen corresponding path program 102 times [2022-03-20 18:30:52,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438957217] [2022-03-20 18:30:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:52,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:53,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:53,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438957217] [2022-03-20 18:30:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438957217] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:53,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411534493] [2022-03-20 18:30:53,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:30:53,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:53,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:53,620 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) [2022-03-20 18:30:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 18:30:53,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 18:30:53,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 18:30:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:53,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:30:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411534493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:30:56,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:30:56,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-03-20 18:30:56,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182635645] [2022-03-20 18:30:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182635645] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:56,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:56,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:30:56,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537974785] [2022-03-20 18:30:56,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:56,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 18:30:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 18:30:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5683, Invalid=6749, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 18:30:56,603 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) [2022-03-20 18:30:57,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:57,972 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 18:30:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 18:30:57,972 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 [2022-03-20 18:30:57,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:57,973 INFO L225 Difference]: With dead ends: 122 [2022-03-20 18:30:57,973 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 18:30:57,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2311 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11258, Invalid=16132, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 18:30:57,974 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:57,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 63 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:30:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 18:30:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-03-20 18:30:58,003 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) [2022-03-20 18:30:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2022-03-20 18:30:58,003 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 113 [2022-03-20 18:30:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:58,003 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2022-03-20 18:30:58,004 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) [2022-03-20 18:30:58,004 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2022-03-20 18:30:58,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 18:30:58,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:58,004 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:58,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 18:30:58,219 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 [2022-03-20 18:30:58,219 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:58,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1003956796, now seen corresponding path program 103 times [2022-03-20 18:30:58,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:58,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163751306] [2022-03-20 18:30:58,892 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:30:58,893 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:30:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1003956796, now seen corresponding path program 104 times [2022-03-20 18:30:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:58,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873605808] [2022-03-20 18:30:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:30:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:59,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873605808] [2022-03-20 18:30:59,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873605808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:30:59,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593809797] [2022-03-20 18:30:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:30:59,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:59,902 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) [2022-03-20 18:30:59,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 18:30:59,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:30:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 18:30:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:00,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:02,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593809797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:02,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:02,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 18:31:02,957 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:02,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163751306] [2022-03-20 18:31:02,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163751306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:02,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:02,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 18:31:02,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507490373] [2022-03-20 18:31:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:02,958 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:31:02,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:02,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:31:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5898, Invalid=6984, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 18:31:02,960 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) [2022-03-20 18:31:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:04,394 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 18:31:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:31:04,395 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 [2022-03-20 18:31:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:04,396 INFO L225 Difference]: With dead ends: 124 [2022-03-20 18:31:04,396 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 18:31:04,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2382 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=11686, Invalid=16706, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 18:31:04,399 INFO L913 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 [2022-03-20 18:31:04,399 INFO L914 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] [2022-03-20 18:31:04,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 18:31:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-03-20 18:31:04,426 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) [2022-03-20 18:31:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2022-03-20 18:31:04,436 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 115 [2022-03-20 18:31:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:04,436 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2022-03-20 18:31:04,436 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) [2022-03-20 18:31:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2022-03-20 18:31:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 18:31:04,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:04,437 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:04,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:04,647 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 [2022-03-20 18:31:04,647 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1629658240, now seen corresponding path program 105 times [2022-03-20 18:31:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:04,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38270736] [2022-03-20 18:31:05,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:05,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1629658240, now seen corresponding path program 106 times [2022-03-20 18:31:05,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:05,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802783358] [2022-03-20 18:31:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:05,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802783358] [2022-03-20 18:31:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802783358] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838716626] [2022-03-20 18:31:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:06,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:06,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:06,126 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) [2022-03-20 18:31:06,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 18:31:06,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:06,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:06,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 18:31:06,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:06,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:09,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838716626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:09,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:09,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 18:31:09,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38270736] [2022-03-20 18:31:09,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38270736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:09,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:09,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:31:09,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595454228] [2022-03-20 18:31:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:09,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 18:31:09,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 18:31:09,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=7223, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 18:31:09,268 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) [2022-03-20 18:31:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:10,634 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 18:31:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 18:31:10,634 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 [2022-03-20 18:31:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:10,635 INFO L225 Difference]: With dead ends: 126 [2022-03-20 18:31:10,635 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 18:31:10,637 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12122, Invalid=17290, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 18:31:10,637 INFO L913 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 [2022-03-20 18:31:10,637 INFO L914 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] [2022-03-20 18:31:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 18:31:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-20 18:31:10,662 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) [2022-03-20 18:31:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2022-03-20 18:31:10,662 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 117 [2022-03-20 18:31:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:10,662 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2022-03-20 18:31:10,662 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) [2022-03-20 18:31:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2022-03-20 18:31:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 18:31:10,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:10,663 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:10,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 18:31:10,863 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 [2022-03-20 18:31:10,864 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1633324484, now seen corresponding path program 107 times [2022-03-20 18:31:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:10,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685550997] [2022-03-20 18:31:11,504 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:11,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1633324484, now seen corresponding path program 108 times [2022-03-20 18:31:11,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:11,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623596822] [2022-03-20 18:31:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:11,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:12,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:12,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623596822] [2022-03-20 18:31:12,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623596822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:12,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495601410] [2022-03-20 18:31:12,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:12,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:12,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:12,614 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) [2022-03-20 18:31:12,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 18:31:12,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-20 18:31:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:12,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-20 18:31:12,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:12,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:15,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495601410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:15,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:15,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 118 [2022-03-20 18:31:15,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:15,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685550997] [2022-03-20 18:31:15,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685550997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:15,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:15,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 18:31:15,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641306941] [2022-03-20 18:31:15,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:15,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:31:15,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:31:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6340, Invalid=7466, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 18:31:15,910 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) [2022-03-20 18:31:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:17,331 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 18:31:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:31:17,331 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 [2022-03-20 18:31:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:17,332 INFO L225 Difference]: With dead ends: 128 [2022-03-20 18:31:17,332 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 18:31:17,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2527 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12566, Invalid=17884, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 18:31:17,333 INFO L913 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 [2022-03-20 18:31:17,334 INFO L914 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] [2022-03-20 18:31:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 18:31:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-20 18:31:17,364 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) [2022-03-20 18:31:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2022-03-20 18:31:17,365 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 119 [2022-03-20 18:31:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:17,365 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2022-03-20 18:31:17,365 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) [2022-03-20 18:31:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2022-03-20 18:31:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 18:31:17,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:17,366 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:17,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 18:31:17,575 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 [2022-03-20 18:31:17,575 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:17,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -861617672, now seen corresponding path program 109 times [2022-03-20 18:31:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:17,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295226806] [2022-03-20 18:31:18,298 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:18,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash -861617672, now seen corresponding path program 110 times [2022-03-20 18:31:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:18,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233754546] [2022-03-20 18:31:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233754546] [2022-03-20 18:31:19,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233754546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:19,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41964854] [2022-03-20 18:31:19,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:19,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:19,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:19,398 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) [2022-03-20 18:31:19,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 18:31:19,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:19,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 18:31:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:19,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41964854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:22,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:22,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 18:31:22,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295226806] [2022-03-20 18:31:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295226806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:22,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:22,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:31:22,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446963722] [2022-03-20 18:31:22,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:22,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 18:31:22,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:22,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 18:31:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6567, Invalid=7713, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 18:31:22,729 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) [2022-03-20 18:31:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:24,173 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 18:31:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 18:31:24,173 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 [2022-03-20 18:31:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:24,174 INFO L225 Difference]: With dead ends: 130 [2022-03-20 18:31:24,174 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 18:31:24,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13018, Invalid=18488, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 18:31:24,175 INFO L913 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 [2022-03-20 18:31:24,175 INFO L914 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] [2022-03-20 18:31:24,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 18:31:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-03-20 18:31:24,198 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) [2022-03-20 18:31:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2022-03-20 18:31:24,198 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 121 [2022-03-20 18:31:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:24,198 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2022-03-20 18:31:24,198 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) [2022-03-20 18:31:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2022-03-20 18:31:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 18:31:24,199 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:24,199 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:24,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 18:31:24,399 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 [2022-03-20 18:31:24,400 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2014253748, now seen corresponding path program 111 times [2022-03-20 18:31:24,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:24,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053284139] [2022-03-20 18:31:25,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:25,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:25,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2014253748, now seen corresponding path program 112 times [2022-03-20 18:31:25,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:25,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556831196] [2022-03-20 18:31:25,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:25,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:26,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:26,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:26,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556831196] [2022-03-20 18:31:26,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556831196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:26,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628381467] [2022-03-20 18:31:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:26,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:26,479 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) [2022-03-20 18:31:26,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 18:31:26,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:26,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 18:31:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:26,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:29,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628381467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:29,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:29,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 18:31:29,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:29,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053284139] [2022-03-20 18:31:29,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053284139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:29,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:29,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 18:31:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672614735] [2022-03-20 18:31:29,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:29,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:31:29,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:29,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:31:29,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6798, Invalid=7964, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 18:31:29,998 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) [2022-03-20 18:31:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:31,525 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 18:31:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:31:31,526 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 [2022-03-20 18:31:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:31,527 INFO L225 Difference]: With dead ends: 132 [2022-03-20 18:31:31,527 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 18:31:31,528 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=13478, Invalid=19102, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 18:31:31,529 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:31,529 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 48 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:31,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 18:31:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-03-20 18:31:31,561 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) [2022-03-20 18:31:31,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2022-03-20 18:31:31,562 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 123 [2022-03-20 18:31:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:31,562 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2022-03-20 18:31:31,562 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) [2022-03-20 18:31:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2022-03-20 18:31:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 18:31:31,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:31,563 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:31,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:31,779 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 [2022-03-20 18:31:31,779 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:31,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:31,780 INFO L85 PathProgramCache]: Analyzing trace with hash -232250256, now seen corresponding path program 113 times [2022-03-20 18:31:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:31,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211705185] [2022-03-20 18:31:32,404 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:32,404 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:32,404 INFO L85 PathProgramCache]: Analyzing trace with hash -232250256, now seen corresponding path program 114 times [2022-03-20 18:31:32,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:32,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451189560] [2022-03-20 18:31:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:32,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451189560] [2022-03-20 18:31:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451189560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634932626] [2022-03-20 18:31:33,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:33,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:33,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:33,643 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) [2022-03-20 18:31:33,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 18:31:33,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-20 18:31:33,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:33,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 18:31:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:33,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:37,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634932626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:37,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:37,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 62] total 124 [2022-03-20 18:31:37,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:37,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211705185] [2022-03-20 18:31:37,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211705185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:37,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:37,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:31:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160281951] [2022-03-20 18:31:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:37,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 18:31:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 18:31:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7033, Invalid=8219, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 18:31:37,246 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) [2022-03-20 18:31:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:38,806 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 18:31:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 18:31:38,806 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 [2022-03-20 18:31:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:38,807 INFO L225 Difference]: With dead ends: 134 [2022-03-20 18:31:38,807 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 18:31:38,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=13946, Invalid=19726, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 18:31:38,809 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:38,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 33 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 18:31:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-03-20 18:31:38,835 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) [2022-03-20 18:31:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2022-03-20 18:31:38,835 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 125 [2022-03-20 18:31:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:38,836 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2022-03-20 18:31:38,836 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) [2022-03-20 18:31:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2022-03-20 18:31:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 18:31:38,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:38,836 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:38,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 18:31:39,037 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 [2022-03-20 18:31:39,037 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1245951788, now seen corresponding path program 115 times [2022-03-20 18:31:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:39,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190910479] [2022-03-20 18:31:39,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:39,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1245951788, now seen corresponding path program 116 times [2022-03-20 18:31:39,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:39,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33261561] [2022-03-20 18:31:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:39,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:40,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:40,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33261561] [2022-03-20 18:31:40,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33261561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126204362] [2022-03-20 18:31:40,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:31:40,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:40,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:40,703 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) [2022-03-20 18:31:40,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 18:31:40,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:31:40,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:40,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 18:31:40,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:41,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126204362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:44,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:44,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 18:31:44,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:44,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190910479] [2022-03-20 18:31:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190910479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:44,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:44,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 18:31:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593600095] [2022-03-20 18:31:44,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:44,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:31:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:31:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7272, Invalid=8478, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 18:31:44,482 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) [2022-03-20 18:31:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:46,107 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 18:31:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:31:46,108 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 [2022-03-20 18:31:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:46,108 INFO L225 Difference]: With dead ends: 136 [2022-03-20 18:31:46,108 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 18:31:46,110 INFO L912 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 [2022-03-20 18:31:46,111 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:46,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 63 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:46,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 18:31:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-03-20 18:31:46,134 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) [2022-03-20 18:31:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2022-03-20 18:31:46,135 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 127 [2022-03-20 18:31:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:46,135 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2022-03-20 18:31:46,135 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) [2022-03-20 18:31:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2022-03-20 18:31:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 18:31:46,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:46,136 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:46,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:46,339 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 [2022-03-20 18:31:46,340 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash 163941096, now seen corresponding path program 117 times [2022-03-20 18:31:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:46,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [127439968] [2022-03-20 18:31:47,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:47,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 163941096, now seen corresponding path program 118 times [2022-03-20 18:31:47,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:47,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30472203] [2022-03-20 18:31:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:47,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:48,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:48,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30472203] [2022-03-20 18:31:48,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30472203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:48,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056950170] [2022-03-20 18:31:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:31:48,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:48,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:48,346 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) [2022-03-20 18:31:48,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 18:31:48,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:31:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 18:31:48,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:48,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056950170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:52,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:52,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 18:31:52,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [127439968] [2022-03-20 18:31:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [127439968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:52,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:52,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:31:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004929172] [2022-03-20 18:31:52,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:52,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 18:31:52,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 18:31:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7515, Invalid=8741, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 18:31:52,159 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) [2022-03-20 18:31:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:53,826 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 18:31:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 18:31:53,827 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 [2022-03-20 18:31:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:53,827 INFO L225 Difference]: With dead ends: 138 [2022-03-20 18:31:53,827 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 18:31:53,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=14906, Invalid=21004, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 18:31:53,829 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:53,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 43 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:31:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 18:31:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-03-20 18:31:53,853 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) [2022-03-20 18:31:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2022-03-20 18:31:53,853 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 129 [2022-03-20 18:31:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:53,853 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2022-03-20 18:31:53,854 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) [2022-03-20 18:31:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2022-03-20 18:31:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 18:31:53,854 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:53,854 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:53,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:54,055 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 [2022-03-20 18:31:54,055 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:54,056 INFO L85 PathProgramCache]: Analyzing trace with hash -266248284, now seen corresponding path program 119 times [2022-03-20 18:31:54,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:54,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1633362404] [2022-03-20 18:31:54,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:31:54,507 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:31:54,507 INFO L85 PathProgramCache]: Analyzing trace with hash -266248284, now seen corresponding path program 120 times [2022-03-20 18:31:54,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:54,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579056908] [2022-03-20 18:31:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:54,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:55,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:31:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:55,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579056908] [2022-03-20 18:31:55,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579056908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:31:55,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819187071] [2022-03-20 18:31:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:31:55,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:55,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:55,806 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) [2022-03-20 18:31:55,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 18:31:55,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-20 18:31:55,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:31:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 18:31:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:56,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:31:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:59,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819187071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:31:59,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:31:59,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 130 [2022-03-20 18:31:59,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:59,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1633362404] [2022-03-20 18:31:59,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1633362404] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:59,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:59,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 18:31:59,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748955301] [2022-03-20 18:31:59,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:59,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:31:59,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:31:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7762, Invalid=9008, Unknown=0, NotChecked=0, Total=16770 [2022-03-20 18:31:59,721 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) [2022-03-20 18:32:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:01,423 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 18:32:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:32:01,423 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 [2022-03-20 18:32:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:01,424 INFO L225 Difference]: With dead ends: 140 [2022-03-20 18:32:01,424 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 18:32:01,426 INFO L912 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 [2022-03-20 18:32:01,426 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:01,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 63 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:32:01,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 18:32:01,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-03-20 18:32:01,453 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) [2022-03-20 18:32:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2022-03-20 18:32:01,453 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 131 [2022-03-20 18:32:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:01,453 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2022-03-20 18:32:01,453 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) [2022-03-20 18:32:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2022-03-20 18:32:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 18:32:01,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:01,454 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:01,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 18:32:01,655 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 [2022-03-20 18:32:01,655 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:01,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1361382048, now seen corresponding path program 121 times [2022-03-20 18:32:01,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:01,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [927793138] [2022-03-20 18:32:02,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:02,140 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1361382048, now seen corresponding path program 122 times [2022-03-20 18:32:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:02,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442312693] [2022-03-20 18:32:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:03,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:03,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442312693] [2022-03-20 18:32:03,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442312693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:03,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645398146] [2022-03-20 18:32:03,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:32:03,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:03,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:03,454 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) [2022-03-20 18:32:03,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 18:32:03,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:32:03,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 18:32:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:03,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:07,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645398146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:07,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:07,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 18:32:07,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [927793138] [2022-03-20 18:32:07,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [927793138] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:07,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:07,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:32:07,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650152765] [2022-03-20 18:32:07,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:07,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 18:32:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 18:32:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8013, Invalid=9279, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 18:32:07,456 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) [2022-03-20 18:32:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:09,226 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 18:32:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 18:32:09,226 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 [2022-03-20 18:32:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:09,227 INFO L225 Difference]: With dead ends: 142 [2022-03-20 18:32:09,227 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 18:32:09,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15898, Invalid=22322, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 18:32:09,229 INFO L913 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:09,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 48 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:32:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 18:32:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-03-20 18:32:09,253 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) [2022-03-20 18:32:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2022-03-20 18:32:09,254 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 133 [2022-03-20 18:32:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:09,254 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2022-03-20 18:32:09,254 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) [2022-03-20 18:32:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2022-03-20 18:32:09,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 18:32:09,255 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:09,255 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:09,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 18:32:09,455 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 [2022-03-20 18:32:09,456 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:09,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1517941732, now seen corresponding path program 123 times [2022-03-20 18:32:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:09,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1152669479] [2022-03-20 18:32:10,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:10,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:10,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1517941732, now seen corresponding path program 124 times [2022-03-20 18:32:10,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:10,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111429645] [2022-03-20 18:32:10,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:10,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:11,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:11,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:11,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111429645] [2022-03-20 18:32:11,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111429645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:11,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140981902] [2022-03-20 18:32:11,418 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:32:11,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:11,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:11,419 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) [2022-03-20 18:32:11,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 18:32:11,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:32:11,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 18:32:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:11,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:15,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140981902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:15,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:15,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 18:32:15,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:15,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1152669479] [2022-03-20 18:32:15,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1152669479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:15,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:15,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 18:32:15,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632005001] [2022-03-20 18:32:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:15,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:32:15,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:15,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:32:15,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8268, Invalid=9554, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 18:32:15,530 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) [2022-03-20 18:32:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:17,324 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 18:32:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:32:17,325 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 [2022-03-20 18:32:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:17,325 INFO L225 Difference]: With dead ends: 144 [2022-03-20 18:32:17,325 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 18:32:17,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3147 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16406, Invalid=22996, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 18:32:17,335 INFO L913 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 [2022-03-20 18:32:17,335 INFO L914 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] [2022-03-20 18:32:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 18:32:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-03-20 18:32:17,362 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) [2022-03-20 18:32:17,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2022-03-20 18:32:17,363 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 135 [2022-03-20 18:32:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:17,363 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2022-03-20 18:32:17,363 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) [2022-03-20 18:32:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2022-03-20 18:32:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 18:32:17,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:17,364 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:17,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:17,566 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 [2022-03-20 18:32:17,566 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1647942696, now seen corresponding path program 125 times [2022-03-20 18:32:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1826460792] [2022-03-20 18:32:18,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:18,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1647942696, now seen corresponding path program 126 times [2022-03-20 18:32:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:18,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066328861] [2022-03-20 18:32:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:19,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066328861] [2022-03-20 18:32:19,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066328861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:19,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004036413] [2022-03-20 18:32:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:32:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:19,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:19,699 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) [2022-03-20 18:32:19,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 18:32:19,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-20 18:32:19,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 18:32:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:20,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:24,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004036413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:24,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:24,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 136 [2022-03-20 18:32:24,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:24,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1826460792] [2022-03-20 18:32:24,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1826460792] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:24,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:24,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:32:24,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929829642] [2022-03-20 18:32:24,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:24,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 18:32:24,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:24,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 18:32:24,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=9833, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 18:32:24,040 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) [2022-03-20 18:32:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:25,901 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 18:32:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 18:32:25,901 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 [2022-03-20 18:32:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:25,902 INFO L225 Difference]: With dead ends: 146 [2022-03-20 18:32:25,902 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 18:32:25,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=16922, Invalid=23680, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 18:32:25,905 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:25,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 48 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:32:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 18:32:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-03-20 18:32:25,941 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) [2022-03-20 18:32:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2022-03-20 18:32:25,941 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 137 [2022-03-20 18:32:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:25,942 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2022-03-20 18:32:25,942 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) [2022-03-20 18:32:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2022-03-20 18:32:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 18:32:25,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:25,943 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:25,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-20 18:32:26,143 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 [2022-03-20 18:32:26,143 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2024817516, now seen corresponding path program 127 times [2022-03-20 18:32:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [553943653] [2022-03-20 18:32:26,619 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:26,619 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2024817516, now seen corresponding path program 128 times [2022-03-20 18:32:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:26,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018740249] [2022-03-20 18:32:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:28,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:28,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018740249] [2022-03-20 18:32:28,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018740249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:28,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241839273] [2022-03-20 18:32:28,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:32:28,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:28,047 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) [2022-03-20 18:32:28,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 18:32:28,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:32:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 18:32:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:32,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241839273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:32,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 18:32:32,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:32,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [553943653] [2022-03-20 18:32:32,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [553943653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:32,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:32,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 18:32:32,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549590444] [2022-03-20 18:32:32,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:32,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:32:32,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:32:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8790, Invalid=10116, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 18:32:32,378 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) [2022-03-20 18:32:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:34,271 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 18:32:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:32:34,272 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 [2022-03-20 18:32:34,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:34,272 INFO L225 Difference]: With dead ends: 148 [2022-03-20 18:32:34,272 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 18:32:34,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17446, Invalid=24374, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 18:32:34,275 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 140 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 18:32:34,275 INFO L914 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] [2022-03-20 18:32:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 18:32:34,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-03-20 18:32:34,310 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) [2022-03-20 18:32:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2022-03-20 18:32:34,310 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 139 [2022-03-20 18:32:34,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:34,310 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2022-03-20 18:32:34,311 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) [2022-03-20 18:32:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2022-03-20 18:32:34,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 18:32:34,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:34,311 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:34,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 18:32:34,512 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 [2022-03-20 18:32:34,512 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:34,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:34,512 INFO L85 PathProgramCache]: Analyzing trace with hash 870700624, now seen corresponding path program 129 times [2022-03-20 18:32:34,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:34,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1862683576] [2022-03-20 18:32:34,968 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:34,968 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 870700624, now seen corresponding path program 130 times [2022-03-20 18:32:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659532141] [2022-03-20 18:32:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:34,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:36,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:36,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659532141] [2022-03-20 18:32:36,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659532141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:36,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472546167] [2022-03-20 18:32:36,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:32:36,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:36,442 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) [2022-03-20 18:32:36,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 18:32:36,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:32:36,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 18:32:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:40,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472546167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:40,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:40,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 18:32:40,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:40,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1862683576] [2022-03-20 18:32:40,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1862683576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:40,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:40,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:32:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992914266] [2022-03-20 18:32:40,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:40,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 18:32:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 18:32:40,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9057, Invalid=10403, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 18:32:40,929 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) [2022-03-20 18:32:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:42,903 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 18:32:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 18:32:42,903 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 [2022-03-20 18:32:42,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:42,903 INFO L225 Difference]: With dead ends: 150 [2022-03-20 18:32:42,904 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 18:32:42,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3396 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=17978, Invalid=25078, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 18:32:42,905 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 142 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 18:32:42,905 INFO L914 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] [2022-03-20 18:32:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 18:32:42,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-03-20 18:32:42,934 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) [2022-03-20 18:32:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2022-03-20 18:32:42,935 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 141 [2022-03-20 18:32:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:42,935 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2022-03-20 18:32:42,935 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) [2022-03-20 18:32:42,935 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2022-03-20 18:32:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 18:32:42,936 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:42,936 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:42,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 18:32:43,136 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 [2022-03-20 18:32:43,136 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:43,137 INFO L85 PathProgramCache]: Analyzing trace with hash 324825356, now seen corresponding path program 131 times [2022-03-20 18:32:43,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:43,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1654698396] [2022-03-20 18:32:43,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:43,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash 324825356, now seen corresponding path program 132 times [2022-03-20 18:32:43,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:43,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960565848] [2022-03-20 18:32:43,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:43,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:45,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:45,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960565848] [2022-03-20 18:32:45,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960565848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:45,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874819673] [2022-03-20 18:32:45,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:32:45,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:45,338 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) [2022-03-20 18:32:45,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 18:32:45,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-20 18:32:45,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-20 18:32:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:45,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:32:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:49,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874819673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:32:49,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:32:49,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 142 [2022-03-20 18:32:49,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:49,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1654698396] [2022-03-20 18:32:49,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1654698396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:49,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:49,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 18:32:49,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330134892] [2022-03-20 18:32:49,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:49,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:32:49,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:32:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9328, Invalid=10694, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 18:32:49,981 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) [2022-03-20 18:32:51,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:51,987 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 18:32:51,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:32:51,988 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 [2022-03-20 18:32:51,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:51,988 INFO L225 Difference]: With dead ends: 152 [2022-03-20 18:32:51,988 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 18:32:51,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3481 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=18518, Invalid=25792, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 18:32:51,994 INFO L913 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 [2022-03-20 18:32:51,994 INFO L914 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] [2022-03-20 18:32:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 18:32:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-03-20 18:32:52,024 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) [2022-03-20 18:32:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-03-20 18:32:52,025 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-03-20 18:32:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:52,025 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-03-20 18:32:52,025 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) [2022-03-20 18:32:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-03-20 18:32:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 18:32:52,025 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:52,026 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:52,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:52,226 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 [2022-03-20 18:32:52,226 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:52,226 INFO L85 PathProgramCache]: Analyzing trace with hash -275297080, now seen corresponding path program 133 times [2022-03-20 18:32:52,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:52,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904129604] [2022-03-20 18:32:54,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:32:54,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:32:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash -275297080, now seen corresponding path program 134 times [2022-03-20 18:32:54,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:54,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500939632] [2022-03-20 18:32:54,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:54,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:32:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:56,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:56,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500939632] [2022-03-20 18:32:56,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500939632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:32:56,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903466564] [2022-03-20 18:32:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:32:56,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:56,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:56,485 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) [2022-03-20 18:32:56,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 18:32:56,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:32:56,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:32:56,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 18:32:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:56,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:01,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903466564] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:01,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:01,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-20 18:33:01,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904129604] [2022-03-20 18:33:01,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904129604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:01,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:01,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:33:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861999779] [2022-03-20 18:33:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:01,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 18:33:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 18:33:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9603, Invalid=10989, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 18:33:01,214 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) [2022-03-20 18:33:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:03,291 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-03-20 18:33:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 18:33:03,291 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 [2022-03-20 18:33:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:03,292 INFO L225 Difference]: With dead ends: 154 [2022-03-20 18:33:03,292 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 18:33:03,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3567 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19066, Invalid=26516, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 18:33:03,294 INFO L913 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 [2022-03-20 18:33:03,294 INFO L914 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] [2022-03-20 18:33:03,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 18:33:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-03-20 18:33:03,331 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) [2022-03-20 18:33:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2022-03-20 18:33:03,331 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 145 [2022-03-20 18:33:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:03,331 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2022-03-20 18:33:03,332 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) [2022-03-20 18:33:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2022-03-20 18:33:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 18:33:03,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:03,332 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:03,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:03,550 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 [2022-03-20 18:33:03,550 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1467340412, now seen corresponding path program 135 times [2022-03-20 18:33:03,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:03,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207986460] [2022-03-20 18:33:04,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:04,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1467340412, now seen corresponding path program 136 times [2022-03-20 18:33:04,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991552696] [2022-03-20 18:33:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:04,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:05,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:05,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:05,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991552696] [2022-03-20 18:33:05,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991552696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:05,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400330614] [2022-03-20 18:33:05,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:33:05,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:05,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:05,796 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) [2022-03-20 18:33:05,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 18:33:05,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:33:05,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:05,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 18:33:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:06,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400330614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:10,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:10,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 18:33:10,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:10,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207986460] [2022-03-20 18:33:10,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207986460] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:10,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:10,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 18:33:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279872658] [2022-03-20 18:33:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:10,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:33:10,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:33:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9882, Invalid=11288, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 18:33:10,685 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) [2022-03-20 18:33:12,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:12,818 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-03-20 18:33:12,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:33:12,819 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 [2022-03-20 18:33:12,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:12,820 INFO L225 Difference]: With dead ends: 156 [2022-03-20 18:33:12,820 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 18:33:12,823 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=19622, Invalid=27250, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 18:33:12,823 INFO L913 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 [2022-03-20 18:33:12,823 INFO L914 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] [2022-03-20 18:33:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 18:33:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-03-20 18:33:12,874 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) [2022-03-20 18:33:12,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2022-03-20 18:33:12,874 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 147 [2022-03-20 18:33:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:12,875 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2022-03-20 18:33:12,875 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) [2022-03-20 18:33:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2022-03-20 18:33:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 18:33:12,876 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:12,876 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:12,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:13,090 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 [2022-03-20 18:33:13,091 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:13,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash -264714432, now seen corresponding path program 137 times [2022-03-20 18:33:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:13,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937639091] [2022-03-20 18:33:13,562 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:13,562 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash -264714432, now seen corresponding path program 138 times [2022-03-20 18:33:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:13,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666643344] [2022-03-20 18:33:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:15,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:15,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666643344] [2022-03-20 18:33:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666643344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:15,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694376683] [2022-03-20 18:33:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:33:15,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:15,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:15,214 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) [2022-03-20 18:33:15,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 18:33:15,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-20 18:33:15,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:15,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 18:33:15,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:15,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694376683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:20,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:20,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 148 [2022-03-20 18:33:20,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937639091] [2022-03-20 18:33:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937639091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:20,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:20,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:33:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953606883] [2022-03-20 18:33:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:20,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 18:33:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 18:33:20,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10165, Invalid=11591, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 18:33:20,305 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) [2022-03-20 18:33:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:22,485 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-03-20 18:33:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 18:33:22,486 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 [2022-03-20 18:33:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:22,487 INFO L225 Difference]: With dead ends: 158 [2022-03-20 18:33:22,487 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 18:33:22,489 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20186, Invalid=27994, Unknown=0, NotChecked=0, Total=48180 [2022-03-20 18:33:22,489 INFO L913 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 [2022-03-20 18:33:22,489 INFO L914 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] [2022-03-20 18:33:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 18:33:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-03-20 18:33:22,520 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) [2022-03-20 18:33:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2022-03-20 18:33:22,520 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 149 [2022-03-20 18:33:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:22,520 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2022-03-20 18:33:22,521 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) [2022-03-20 18:33:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2022-03-20 18:33:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 18:33:22,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:22,521 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:22,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:22,735 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 [2022-03-20 18:33:22,735 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 112649724, now seen corresponding path program 139 times [2022-03-20 18:33:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:22,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [383769892] [2022-03-20 18:33:23,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:23,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 112649724, now seen corresponding path program 140 times [2022-03-20 18:33:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960560595] [2022-03-20 18:33:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:24,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960560595] [2022-03-20 18:33:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960560595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251141242] [2022-03-20 18:33:24,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:33:24,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:24,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:24,810 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) [2022-03-20 18:33:24,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 18:33:24,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:33:24,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 18:33:24,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:25,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251141242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:29,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-20 18:33:29,937 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:29,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [383769892] [2022-03-20 18:33:29,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [383769892] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:29,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:29,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 18:33:29,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750245152] [2022-03-20 18:33:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:29,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:33:29,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:33:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10452, Invalid=11898, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 18:33:29,940 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) [2022-03-20 18:33:32,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:32,189 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-20 18:33:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:33:32,189 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 [2022-03-20 18:33:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:32,190 INFO L225 Difference]: With dead ends: 160 [2022-03-20 18:33:32,190 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 18:33:32,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=20758, Invalid=28748, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 18:33:32,192 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 18:33:32,192 INFO L914 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] [2022-03-20 18:33:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 18:33:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-03-20 18:33:32,223 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) [2022-03-20 18:33:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2022-03-20 18:33:32,224 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 151 [2022-03-20 18:33:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:32,224 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2022-03-20 18:33:32,224 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) [2022-03-20 18:33:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2022-03-20 18:33:32,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 18:33:32,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:32,225 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:32,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:32,439 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 [2022-03-20 18:33:32,439 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1982350776, now seen corresponding path program 141 times [2022-03-20 18:33:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241198251] [2022-03-20 18:33:32,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:32,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1982350776, now seen corresponding path program 142 times [2022-03-20 18:33:32,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:32,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138543568] [2022-03-20 18:33:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:32,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:34,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138543568] [2022-03-20 18:33:34,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138543568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:34,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867578723] [2022-03-20 18:33:34,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:33:34,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:34,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:34,669 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) [2022-03-20 18:33:34,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 18:33:34,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:33:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:34,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 18:33:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:35,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:39,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867578723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:39,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:39,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 18:33:39,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:39,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241198251] [2022-03-20 18:33:39,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241198251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:39,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:39,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:33:39,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732989071] [2022-03-20 18:33:39,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:39,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 18:33:39,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 18:33:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10743, Invalid=12209, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 18:33:39,956 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) [2022-03-20 18:33:42,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:42,259 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-03-20 18:33:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 18:33:42,259 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 [2022-03-20 18:33:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:42,259 INFO L225 Difference]: With dead ends: 162 [2022-03-20 18:33:42,260 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 18:33:42,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21338, Invalid=29512, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 18:33:42,262 INFO L913 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 [2022-03-20 18:33:42,262 INFO L914 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] [2022-03-20 18:33:42,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 18:33:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-03-20 18:33:42,294 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) [2022-03-20 18:33:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2022-03-20 18:33:42,294 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 153 [2022-03-20 18:33:42,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:42,295 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2022-03-20 18:33:42,295 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) [2022-03-20 18:33:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2022-03-20 18:33:42,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 18:33:42,295 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:42,296 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:42,313 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 18:33:42,499 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 [2022-03-20 18:33:42,499 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:42,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash -826235276, now seen corresponding path program 143 times [2022-03-20 18:33:42,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:42,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [724951618] [2022-03-20 18:33:42,988 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:42,988 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash -826235276, now seen corresponding path program 144 times [2022-03-20 18:33:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536711955] [2022-03-20 18:33:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:44,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536711955] [2022-03-20 18:33:44,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536711955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199838818] [2022-03-20 18:33:44,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:33:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:44,787 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) [2022-03-20 18:33:44,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 18:33:44,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-03-20 18:33:44,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 18:33:44,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:33:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199838818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:33:50,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:33:50,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77, 77] total 154 [2022-03-20 18:33:50,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [724951618] [2022-03-20 18:33:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [724951618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:50,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:50,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 18:33:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594809959] [2022-03-20 18:33:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:50,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:33:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:33:50,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11038, Invalid=12524, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 18:33:50,203 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) [2022-03-20 18:33:52,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:52,563 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-03-20 18:33:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:33:52,563 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 [2022-03-20 18:33:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:52,564 INFO L225 Difference]: With dead ends: 164 [2022-03-20 18:33:52,564 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 18:33:52,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4012 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=21926, Invalid=30286, Unknown=0, NotChecked=0, Total=52212 [2022-03-20 18:33:52,567 INFO L913 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 [2022-03-20 18:33:52,567 INFO L914 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] [2022-03-20 18:33:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 18:33:52,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-03-20 18:33:52,601 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) [2022-03-20 18:33:52,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2022-03-20 18:33:52,602 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 155 [2022-03-20 18:33:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:52,602 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2022-03-20 18:33:52,602 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) [2022-03-20 18:33:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2022-03-20 18:33:52,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 18:33:52,602 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:52,603 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:52,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-20 18:33:52,803 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 [2022-03-20 18:33:52,803 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1656997936, now seen corresponding path program 145 times [2022-03-20 18:33:52,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:52,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506377356] [2022-03-20 18:33:53,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:33:53,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:33:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1656997936, now seen corresponding path program 146 times [2022-03-20 18:33:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213335711] [2022-03-20 18:33:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:33:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:55,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213335711] [2022-03-20 18:33:55,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213335711] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:33:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051334174] [2022-03-20 18:33:55,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:33:55,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:55,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:55,266 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) [2022-03-20 18:33:55,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 18:33:55,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:33:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:33:55,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 18:33:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:55,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:00,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051334174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:00,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:00,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-20 18:34:00,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:00,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506377356] [2022-03-20 18:34:00,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506377356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:00,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:00,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:34:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864008954] [2022-03-20 18:34:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:00,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 18:34:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 18:34:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11337, Invalid=12843, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 18:34:00,801 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) [2022-03-20 18:34:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:03,222 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-03-20 18:34:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 18:34:03,225 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 [2022-03-20 18:34:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:03,226 INFO L225 Difference]: With dead ends: 166 [2022-03-20 18:34:03,226 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 18:34:03,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4104 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22522, Invalid=31070, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 18:34:03,229 INFO L913 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 [2022-03-20 18:34:03,229 INFO L914 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] [2022-03-20 18:34:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 18:34:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-03-20 18:34:03,281 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) [2022-03-20 18:34:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2022-03-20 18:34:03,282 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 157 [2022-03-20 18:34:03,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:03,282 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2022-03-20 18:34:03,282 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) [2022-03-20 18:34:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2022-03-20 18:34:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 18:34:03,283 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:03,283 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:03,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-20 18:34:03,495 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 [2022-03-20 18:34:03,495 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:03,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:03,496 INFO L85 PathProgramCache]: Analyzing trace with hash 42298092, now seen corresponding path program 147 times [2022-03-20 18:34:03,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:03,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2073322689] [2022-03-20 18:34:04,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:34:04,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:34:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 42298092, now seen corresponding path program 148 times [2022-03-20 18:34:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:04,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619646265] [2022-03-20 18:34:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:06,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619646265] [2022-03-20 18:34:06,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619646265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:34:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499757005] [2022-03-20 18:34:06,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:34:06,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:06,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:06,196 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) [2022-03-20 18:34:06,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 18:34:06,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:34:06,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:34:06,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 18:34:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:06,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:11,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499757005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:11,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:11,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 18:34:11,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:11,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2073322689] [2022-03-20 18:34:11,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2073322689] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:11,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:11,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 18:34:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157300704] [2022-03-20 18:34:11,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:11,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:34:11,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:34:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11640, Invalid=13166, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 18:34:11,856 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) [2022-03-20 18:34:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:14,353 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-03-20 18:34:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:34:14,353 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 [2022-03-20 18:34:14,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:14,354 INFO L225 Difference]: With dead ends: 168 [2022-03-20 18:34:14,354 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 18:34:14,357 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23126, Invalid=31864, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 18:34:14,357 INFO L913 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 [2022-03-20 18:34:14,357 INFO L914 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] [2022-03-20 18:34:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 18:34:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-03-20 18:34:14,414 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) [2022-03-20 18:34:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2022-03-20 18:34:14,415 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 159 [2022-03-20 18:34:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:14,415 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2022-03-20 18:34:14,415 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) [2022-03-20 18:34:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2022-03-20 18:34:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 18:34:14,416 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:14,416 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:14,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 18:34:14,620 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 [2022-03-20 18:34:14,621 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1201058136, now seen corresponding path program 149 times [2022-03-20 18:34:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638689412] [2022-03-20 18:34:15,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:34:15,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:34:15,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1201058136, now seen corresponding path program 150 times [2022-03-20 18:34:15,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:15,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007992064] [2022-03-20 18:34:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:15,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:17,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007992064] [2022-03-20 18:34:17,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007992064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:34:17,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277953272] [2022-03-20 18:34:17,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:34:17,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:17,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:17,023 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) [2022-03-20 18:34:17,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 18:34:17,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-20 18:34:17,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:34:17,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 18:34:17,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:17,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:22,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277953272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:22,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:22,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-03-20 18:34:22,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638689412] [2022-03-20 18:34:22,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638689412] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:22,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:22,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:34:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544417441] [2022-03-20 18:34:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:22,873 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 18:34:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 18:34:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11947, Invalid=13493, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 18:34:22,876 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) [2022-03-20 18:34:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:25,461 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-20 18:34:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 18:34:25,461 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 [2022-03-20 18:34:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:25,462 INFO L225 Difference]: With dead ends: 170 [2022-03-20 18:34:25,462 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 18:34:25,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4291 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=23738, Invalid=32668, Unknown=0, NotChecked=0, Total=56406 [2022-03-20 18:34:25,464 INFO L913 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 [2022-03-20 18:34:25,467 INFO L914 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] [2022-03-20 18:34:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 18:34:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-03-20 18:34:25,522 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) [2022-03-20 18:34:25,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2022-03-20 18:34:25,523 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 161 [2022-03-20 18:34:25,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:25,523 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2022-03-20 18:34:25,523 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) [2022-03-20 18:34:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2022-03-20 18:34:25,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 18:34:25,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:25,524 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:25,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 18:34:25,738 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 [2022-03-20 18:34:25,739 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:25,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2065484956, now seen corresponding path program 151 times [2022-03-20 18:34:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558744339] [2022-03-20 18:34:26,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:34:26,246 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:34:26,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2065484956, now seen corresponding path program 152 times [2022-03-20 18:34:26,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:26,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111387434] [2022-03-20 18:34:26,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:26,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:28,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:28,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111387434] [2022-03-20 18:34:28,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111387434] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:34:28,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98989453] [2022-03-20 18:34:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:34:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:28,220 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) [2022-03-20 18:34:28,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 18:34:28,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:34:28,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:34:28,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 18:34:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98989453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:34,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-20 18:34:34,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558744339] [2022-03-20 18:34:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558744339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:34,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:34,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 18:34:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917549146] [2022-03-20 18:34:34,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:34,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:34:34,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:34:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12258, Invalid=13824, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 18:34:34,190 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) [2022-03-20 18:34:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:36,804 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-03-20 18:34:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:34:36,804 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 [2022-03-20 18:34:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:36,805 INFO L225 Difference]: With dead ends: 172 [2022-03-20 18:34:36,805 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 18:34:36,808 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=24358, Invalid=33482, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 18:34:36,808 INFO L913 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 [2022-03-20 18:34:36,809 INFO L914 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] [2022-03-20 18:34:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 18:34:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-03-20 18:34:36,856 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) [2022-03-20 18:34:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2022-03-20 18:34:36,856 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 163 [2022-03-20 18:34:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:36,857 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2022-03-20 18:34:36,857 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) [2022-03-20 18:34:36,857 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2022-03-20 18:34:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 18:34:36,857 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:36,857 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:36,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 18:34:37,058 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 [2022-03-20 18:34:37,058 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 443996448, now seen corresponding path program 153 times [2022-03-20 18:34:37,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [833145597] [2022-03-20 18:34:37,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:34:37,832 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:34:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 443996448, now seen corresponding path program 154 times [2022-03-20 18:34:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:37,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290145609] [2022-03-20 18:34:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:39,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:39,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290145609] [2022-03-20 18:34:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290145609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:34:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147140984] [2022-03-20 18:34:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:34:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:39,853 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) [2022-03-20 18:34:39,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 18:34:39,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:34:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:34:39,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 18:34:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147140984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:45,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 18:34:45,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [833145597] [2022-03-20 18:34:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [833145597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:45,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:45,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:34:45,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841779469] [2022-03-20 18:34:45,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:45,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 18:34:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:45,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 18:34:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12573, Invalid=14159, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 18:34:45,936 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) [2022-03-20 18:34:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:48,582 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-03-20 18:34:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 18:34:48,583 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 [2022-03-20 18:34:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:48,583 INFO L225 Difference]: With dead ends: 174 [2022-03-20 18:34:48,583 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 18:34:48,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=24986, Invalid=34306, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 18:34:48,586 INFO L913 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 [2022-03-20 18:34:48,586 INFO L914 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] [2022-03-20 18:34:48,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 18:34:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-03-20 18:34:48,623 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) [2022-03-20 18:34:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2022-03-20 18:34:48,623 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 165 [2022-03-20 18:34:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:48,624 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2022-03-20 18:34:48,624 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) [2022-03-20 18:34:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2022-03-20 18:34:48,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 18:34:48,624 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:48,624 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:48,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-20 18:34:48,825 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 [2022-03-20 18:34:48,825 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:48,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:48,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1715994660, now seen corresponding path program 155 times [2022-03-20 18:34:48,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:48,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645606344] [2022-03-20 18:34:50,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:34:50,030 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:34:50,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1715994660, now seen corresponding path program 156 times [2022-03-20 18:34:50,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:50,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330066499] [2022-03-20 18:34:50,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:52,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:34:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:52,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330066499] [2022-03-20 18:34:52,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330066499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:34:52,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576871553] [2022-03-20 18:34:52,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:34:52,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:52,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:52,112 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) [2022-03-20 18:34:52,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 18:34:52,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-20 18:34:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:34:52,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-20 18:34:52,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:52,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:34:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:58,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576871553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:34:58,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:34:58,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83, 83] total 166 [2022-03-20 18:34:58,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:58,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645606344] [2022-03-20 18:34:58,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645606344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:58,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:58,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 18:34:58,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200139868] [2022-03-20 18:34:58,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:58,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:34:58,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:34:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12892, Invalid=14498, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 18:34:58,404 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) [2022-03-20 18:35:01,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:01,150 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-03-20 18:35:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:35:01,150 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 [2022-03-20 18:35:01,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:01,151 INFO L225 Difference]: With dead ends: 176 [2022-03-20 18:35:01,151 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 18:35:01,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4579 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=25622, Invalid=35140, Unknown=0, NotChecked=0, Total=60762 [2022-03-20 18:35:01,154 INFO L913 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 [2022-03-20 18:35:01,154 INFO L914 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] [2022-03-20 18:35:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 18:35:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-03-20 18:35:01,207 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) [2022-03-20 18:35:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2022-03-20 18:35:01,207 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 167 [2022-03-20 18:35:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:01,208 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2022-03-20 18:35:01,208 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) [2022-03-20 18:35:01,208 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2022-03-20 18:35:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 18:35:01,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:01,208 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:01,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-20 18:35:01,409 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 [2022-03-20 18:35:01,409 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:01,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1296721816, now seen corresponding path program 157 times [2022-03-20 18:35:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061942259] [2022-03-20 18:35:02,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:35:02,004 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:35:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1296721816, now seen corresponding path program 158 times [2022-03-20 18:35:02,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667011135] [2022-03-20 18:35:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:02,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:04,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:04,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667011135] [2022-03-20 18:35:04,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667011135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220000014] [2022-03-20 18:35:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:35:04,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:04,109 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) [2022-03-20 18:35:04,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 18:35:04,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:35:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:04,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 18:35:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:04,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:04,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220000014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:10,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:10,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-20 18:35:10,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:10,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061942259] [2022-03-20 18:35:10,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061942259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:10,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:10,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:35:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559754754] [2022-03-20 18:35:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:10,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 18:35:10,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 18:35:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13215, Invalid=14841, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 18:35:10,534 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) [2022-03-20 18:35:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:13,607 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-03-20 18:35:13,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 18:35:13,608 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 [2022-03-20 18:35:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:13,608 INFO L225 Difference]: With dead ends: 178 [2022-03-20 18:35:13,608 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 18:35:13,611 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=26266, Invalid=35984, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 18:35:13,611 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 170 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:13,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 53 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:35:13,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 18:35:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-03-20 18:35:13,672 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) [2022-03-20 18:35:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2022-03-20 18:35:13,672 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 169 [2022-03-20 18:35:13,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:13,673 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2022-03-20 18:35:13,673 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) [2022-03-20 18:35:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2022-03-20 18:35:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 18:35:13,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:13,673 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:13,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-20 18:35:13,874 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 [2022-03-20 18:35:13,874 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1709297748, now seen corresponding path program 159 times [2022-03-20 18:35:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:13,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421604777] [2022-03-20 18:35:14,672 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:35:14,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:35:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1709297748, now seen corresponding path program 160 times [2022-03-20 18:35:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:14,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913267596] [2022-03-20 18:35:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:14,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:16,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913267596] [2022-03-20 18:35:16,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913267596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:16,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928265229] [2022-03-20 18:35:16,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:35:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:16,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:16,827 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) [2022-03-20 18:35:16,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 18:35:16,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:35:16,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 18:35:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:17,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:23,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928265229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:23,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:23,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 18:35:23,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:23,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421604777] [2022-03-20 18:35:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421604777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:23,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 18:35:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726371187] [2022-03-20 18:35:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:23,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:35:23,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:35:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13542, Invalid=15188, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 18:35:23,366 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) [2022-03-20 18:35:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:26,208 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-03-20 18:35:26,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:35:26,208 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 [2022-03-20 18:35:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:26,209 INFO L225 Difference]: With dead ends: 180 [2022-03-20 18:35:26,209 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 18:35:26,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4776 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=26918, Invalid=36838, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 18:35:26,212 INFO L913 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 [2022-03-20 18:35:26,212 INFO L914 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] [2022-03-20 18:35:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 18:35:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-03-20 18:35:26,282 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) [2022-03-20 18:35:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2022-03-20 18:35:26,283 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 171 [2022-03-20 18:35:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:26,283 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2022-03-20 18:35:26,283 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) [2022-03-20 18:35:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2022-03-20 18:35:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 18:35:26,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:26,284 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:26,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 18:35:26,503 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 [2022-03-20 18:35:26,504 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1237190128, now seen corresponding path program 161 times [2022-03-20 18:35:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:26,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1036967642] [2022-03-20 18:35:26,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:35:26,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:35:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1237190128, now seen corresponding path program 162 times [2022-03-20 18:35:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:26,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646011004] [2022-03-20 18:35:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646011004] [2022-03-20 18:35:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646011004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913725976] [2022-03-20 18:35:29,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:35:29,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:29,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:29,087 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) [2022-03-20 18:35:29,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 18:35:29,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-03-20 18:35:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 18:35:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:29,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913725976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:35,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 172 [2022-03-20 18:35:35,865 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:35,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1036967642] [2022-03-20 18:35:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1036967642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:35,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:35:35,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470489912] [2022-03-20 18:35:35,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:35,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 18:35:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:35,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 18:35:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13873, Invalid=15539, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 18:35:35,869 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) [2022-03-20 18:35:38,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:38,796 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-03-20 18:35:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 18:35:38,796 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 [2022-03-20 18:35:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:38,797 INFO L225 Difference]: With dead ends: 182 [2022-03-20 18:35:38,797 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 18:35:38,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=27578, Invalid=37702, Unknown=0, NotChecked=0, Total=65280 [2022-03-20 18:35:38,799 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 174 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:38,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 43 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 18:35:38,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 18:35:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-03-20 18:35:38,854 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) [2022-03-20 18:35:38,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2022-03-20 18:35:38,855 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 173 [2022-03-20 18:35:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:38,855 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2022-03-20 18:35:38,855 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) [2022-03-20 18:35:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2022-03-20 18:35:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 18:35:38,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:38,856 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:38,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:39,075 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 [2022-03-20 18:35:39,075 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1866376396, now seen corresponding path program 163 times [2022-03-20 18:35:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509856176] [2022-03-20 18:35:39,563 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:35:39,563 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:35:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1866376396, now seen corresponding path program 164 times [2022-03-20 18:35:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:39,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506225165] [2022-03-20 18:35:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:41,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:41,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506225165] [2022-03-20 18:35:41,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506225165] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895615725] [2022-03-20 18:35:41,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:35:41,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:41,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:41,825 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) [2022-03-20 18:35:41,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 18:35:41,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:35:41,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 18:35:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:42,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:35:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:48,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895615725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:35:48,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:35:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-20 18:35:48,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:48,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509856176] [2022-03-20 18:35:48,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509856176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:48,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:48,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 18:35:48,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545618043] [2022-03-20 18:35:48,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:48,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:35:48,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:48,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:35:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14208, Invalid=15894, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 18:35:48,665 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) [2022-03-20 18:35:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:51,614 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-03-20 18:35:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:35:51,615 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 [2022-03-20 18:35:51,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:51,615 INFO L225 Difference]: With dead ends: 184 [2022-03-20 18:35:51,615 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 18:35:51,618 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4977 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=28246, Invalid=38576, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 18:35:51,618 INFO L913 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 [2022-03-20 18:35:51,618 INFO L914 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] [2022-03-20 18:35:51,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 18:35:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-03-20 18:35:51,671 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) [2022-03-20 18:35:51,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2022-03-20 18:35:51,672 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 175 [2022-03-20 18:35:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:51,672 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2022-03-20 18:35:51,672 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) [2022-03-20 18:35:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2022-03-20 18:35:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 18:35:51,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:51,673 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:51,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-20 18:35:51,873 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 [2022-03-20 18:35:51,873 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:51,874 INFO L85 PathProgramCache]: Analyzing trace with hash -608464760, now seen corresponding path program 165 times [2022-03-20 18:35:51,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:51,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [686896387] [2022-03-20 18:35:52,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:35:52,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:35:52,411 INFO L85 PathProgramCache]: Analyzing trace with hash -608464760, now seen corresponding path program 166 times [2022-03-20 18:35:52,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:52,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080312210] [2022-03-20 18:35:52,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:52,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:54,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:35:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:35:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:54,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:35:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080312210] [2022-03-20 18:35:54,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080312210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:35:54,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211402675] [2022-03-20 18:35:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:35:54,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:54,726 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) [2022-03-20 18:35:54,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 18:35:54,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:35:54,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:35:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 18:35:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:35:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:35:55,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211402675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:01,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:01,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 18:36:01,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:01,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [686896387] [2022-03-20 18:36:01,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [686896387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:01,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:01,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:36:01,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878332083] [2022-03-20 18:36:01,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:01,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 18:36:01,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:01,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 18:36:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14547, Invalid=16253, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 18:36:01,697 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) [2022-03-20 18:36:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:04,771 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2022-03-20 18:36:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 18:36:04,771 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 [2022-03-20 18:36:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:04,772 INFO L225 Difference]: With dead ends: 186 [2022-03-20 18:36:04,772 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 18:36:04,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5079 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=28922, Invalid=39460, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 18:36:04,775 INFO L913 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 [2022-03-20 18:36:04,775 INFO L914 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] [2022-03-20 18:36:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 18:36:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-03-20 18:36:04,828 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) [2022-03-20 18:36:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2022-03-20 18:36:04,829 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 177 [2022-03-20 18:36:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:04,829 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2022-03-20 18:36:04,829 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) [2022-03-20 18:36:04,829 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2022-03-20 18:36:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 18:36:04,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:04,830 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:04,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 18:36:05,030 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 [2022-03-20 18:36:05,030 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash 481066308, now seen corresponding path program 167 times [2022-03-20 18:36:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:05,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458399956] [2022-03-20 18:36:05,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:36:05,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:36:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 481066308, now seen corresponding path program 168 times [2022-03-20 18:36:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:05,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121035924] [2022-03-20 18:36:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:08,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121035924] [2022-03-20 18:36:08,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121035924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954848778] [2022-03-20 18:36:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:36:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:08,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:08,091 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) [2022-03-20 18:36:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 18:36:08,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-03-20 18:36:08,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:08,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-20 18:36:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:08,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954848778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:15,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89, 89] total 178 [2022-03-20 18:36:15,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458399956] [2022-03-20 18:36:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458399956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:15,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 18:36:15,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627858338] [2022-03-20 18:36:15,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:15,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 18:36:15,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:15,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 18:36:15,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14890, Invalid=16616, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 18:36:15,360 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) [2022-03-20 18:36:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:18,461 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2022-03-20 18:36:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 18:36:18,461 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 [2022-03-20 18:36:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:18,462 INFO L225 Difference]: With dead ends: 188 [2022-03-20 18:36:18,462 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 18:36:18,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=29606, Invalid=40354, Unknown=0, NotChecked=0, Total=69960 [2022-03-20 18:36:18,464 INFO L913 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:18,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 48 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:36:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 18:36:18,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-03-20 18:36:18,520 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) [2022-03-20 18:36:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2022-03-20 18:36:18,520 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 179 [2022-03-20 18:36:18,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:18,521 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2022-03-20 18:36:18,521 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) [2022-03-20 18:36:18,521 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2022-03-20 18:36:18,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 18:36:18,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:18,522 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:18,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 18:36:18,735 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 [2022-03-20 18:36:18,735 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash -451597568, now seen corresponding path program 169 times [2022-03-20 18:36:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:18,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118954189] [2022-03-20 18:36:19,673 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:36:19,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:36:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash -451597568, now seen corresponding path program 170 times [2022-03-20 18:36:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261273937] [2022-03-20 18:36:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261273937] [2022-03-20 18:36:22,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261273937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:22,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957176333] [2022-03-20 18:36:22,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:36:22,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:22,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:22,137 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) [2022-03-20 18:36:22,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 18:36:22,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:36:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:22,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 18:36:22,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:22,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:29,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957176333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:29,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:29,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-20 18:36:29,460 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:29,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118954189] [2022-03-20 18:36:29,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118954189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:29,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:29,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 18:36:29,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293051085] [2022-03-20 18:36:29,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:29,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 18:36:29,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 18:36:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15237, Invalid=16983, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 18:36:29,464 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) [2022-03-20 18:36:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:32,624 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-03-20 18:36:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 18:36:32,625 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 [2022-03-20 18:36:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:32,625 INFO L225 Difference]: With dead ends: 190 [2022-03-20 18:36:32,626 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 18:36:32,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5286 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=30298, Invalid=41258, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 18:36:32,629 INFO L913 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 [2022-03-20 18:36:32,629 INFO L914 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] [2022-03-20 18:36:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 18:36:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-03-20 18:36:32,680 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) [2022-03-20 18:36:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 184 transitions. [2022-03-20 18:36:32,680 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 184 transitions. Word has length 181 [2022-03-20 18:36:32,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:32,681 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 184 transitions. [2022-03-20 18:36:32,681 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) [2022-03-20 18:36:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 184 transitions. [2022-03-20 18:36:32,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 18:36:32,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:32,682 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:32,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 18:36:32,882 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 [2022-03-20 18:36:32,882 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:32,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 906582460, now seen corresponding path program 171 times [2022-03-20 18:36:32,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:32,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2112822237] [2022-03-20 18:36:33,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:36:33,452 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:36:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 906582460, now seen corresponding path program 172 times [2022-03-20 18:36:33,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:33,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682934493] [2022-03-20 18:36:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:33,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:35,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682934493] [2022-03-20 18:36:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682934493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165612056] [2022-03-20 18:36:35,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:36:35,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:35,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:35,928 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) [2022-03-20 18:36:35,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 18:36:36,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:36:36,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 18:36:36,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:36,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:43,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165612056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:43,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:43,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 18:36:43,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2112822237] [2022-03-20 18:36:43,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2112822237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:43,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:43,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 18:36:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986815641] [2022-03-20 18:36:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:43,441 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 18:36:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 18:36:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15588, Invalid=17354, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 18:36:43,443 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) [2022-03-20 18:36:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:36:46,894 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-03-20 18:36:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 18:36:46,894 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 [2022-03-20 18:36:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:36:46,895 INFO L225 Difference]: With dead ends: 192 [2022-03-20 18:36:46,895 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 18:36:46,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5391 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=30998, Invalid=42172, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 18:36:46,898 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 184 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:36:46,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 48 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:36:46,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 18:36:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-03-20 18:36:46,964 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) [2022-03-20 18:36:46,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 186 transitions. [2022-03-20 18:36:46,964 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 186 transitions. Word has length 183 [2022-03-20 18:36:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:36:46,964 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 186 transitions. [2022-03-20 18:36:46,965 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) [2022-03-20 18:36:46,965 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 186 transitions. [2022-03-20 18:36:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 18:36:46,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:36:46,965 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:36:46,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-20 18:36:47,179 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 [2022-03-20 18:36:47,179 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:36:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:36:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash 447531384, now seen corresponding path program 173 times [2022-03-20 18:36:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840615961] [2022-03-20 18:36:47,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:36:47,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:36:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 447531384, now seen corresponding path program 174 times [2022-03-20 18:36:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:36:47,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461119084] [2022-03-20 18:36:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:36:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:36:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:36:50,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461119084] [2022-03-20 18:36:50,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461119084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:36:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686253904] [2022-03-20 18:36:50,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:36:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:36:50,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:36:50,249 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) [2022-03-20 18:36:50,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 18:36:50,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-20 18:36:50,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:36:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 18:36:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:36:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:58,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686253904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:36:58,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:36:58,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 184 [2022-03-20 18:36:58,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:36:58,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840615961] [2022-03-20 18:36:58,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840615961] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:58,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:58,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 18:36:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808504093] [2022-03-20 18:36:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:36:58,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 18:36:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:36:58,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 18:36:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15943, Invalid=17729, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 18:36:58,023 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) [2022-03-20 18:37:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:01,330 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2022-03-20 18:37:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 18:37:01,331 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 [2022-03-20 18:37:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:01,331 INFO L225 Difference]: With dead ends: 194 [2022-03-20 18:37:01,331 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 18:37:01,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5497 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=31706, Invalid=43096, Unknown=0, NotChecked=0, Total=74802 [2022-03-20 18:37:01,334 INFO L913 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 [2022-03-20 18:37:01,335 INFO L914 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] [2022-03-20 18:37:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 18:37:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-03-20 18:37:01,404 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) [2022-03-20 18:37:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2022-03-20 18:37:01,404 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 185 [2022-03-20 18:37:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:01,404 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2022-03-20 18:37:01,404 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) [2022-03-20 18:37:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2022-03-20 18:37:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 18:37:01,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:01,405 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:01,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 18:37:01,606 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 [2022-03-20 18:37:01,606 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:01,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1681078836, now seen corresponding path program 175 times [2022-03-20 18:37:01,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:01,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323429296] [2022-03-20 18:37:02,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:37:02,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:02,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1681078836, now seen corresponding path program 176 times [2022-03-20 18:37:02,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:02,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538964069] [2022-03-20 18:37:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:02,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:05,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538964069] [2022-03-20 18:37:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538964069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399000504] [2022-03-20 18:37:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:37:05,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:05,007 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) [2022-03-20 18:37:05,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 18:37:05,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:37:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 18:37:05,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:05,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:12,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399000504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:12,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:12,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-20 18:37:12,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:12,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323429296] [2022-03-20 18:37:12,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323429296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:12,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:12,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 18:37:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519727286] [2022-03-20 18:37:12,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:12,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 18:37:12,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 18:37:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16302, Invalid=18108, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 18:37:12,832 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) [2022-03-20 18:37:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:16,208 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2022-03-20 18:37:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 18:37:16,209 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 [2022-03-20 18:37:16,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:16,209 INFO L225 Difference]: With dead ends: 196 [2022-03-20 18:37:16,209 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 18:37:16,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5604 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=32422, Invalid=44030, Unknown=0, NotChecked=0, Total=76452 [2022-03-20 18:37:16,212 INFO L913 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:16,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 38 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:37:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 18:37:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-20 18:37:16,260 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) [2022-03-20 18:37:16,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 190 transitions. [2022-03-20 18:37:16,261 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 190 transitions. Word has length 187 [2022-03-20 18:37:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:16,261 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 190 transitions. [2022-03-20 18:37:16,261 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) [2022-03-20 18:37:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 190 transitions. [2022-03-20 18:37:16,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 18:37:16,262 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:16,262 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:16,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 18:37:16,462 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 [2022-03-20 18:37:16,462 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:16,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1709206512, now seen corresponding path program 177 times [2022-03-20 18:37:16,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:16,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488265602] [2022-03-20 18:37:18,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:37:18,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1709206512, now seen corresponding path program 178 times [2022-03-20 18:37:18,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:18,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400199075] [2022-03-20 18:37:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:18,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:20,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400199075] [2022-03-20 18:37:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400199075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267913222] [2022-03-20 18:37:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:37:20,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:20,732 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) [2022-03-20 18:37:20,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 18:37:20,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:37:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 18:37:20,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:21,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:28,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267913222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:28,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94, 94] total 188 [2022-03-20 18:37:28,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488265602] [2022-03-20 18:37:28,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488265602] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:28,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:28,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 18:37:28,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038810225] [2022-03-20 18:37:28,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:28,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 18:37:28,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 18:37:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16665, Invalid=18491, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 18:37:28,717 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) [2022-03-20 18:37:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:32,185 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2022-03-20 18:37:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 18:37:32,185 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 [2022-03-20 18:37:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:32,186 INFO L225 Difference]: With dead ends: 198 [2022-03-20 18:37:32,186 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 18:37:32,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5712 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=33146, Invalid=44974, Unknown=0, NotChecked=0, Total=78120 [2022-03-20 18:37:32,189 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:32,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 43 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:37:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 18:37:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-03-20 18:37:32,239 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) [2022-03-20 18:37:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2022-03-20 18:37:32,239 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 189 [2022-03-20 18:37:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:32,239 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2022-03-20 18:37:32,240 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) [2022-03-20 18:37:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2022-03-20 18:37:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 18:37:32,240 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:32,240 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:32,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 18:37:32,441 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 [2022-03-20 18:37:32,441 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1324867924, now seen corresponding path program 179 times [2022-03-20 18:37:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104900937] [2022-03-20 18:37:33,173 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:37:33,174 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1324867924, now seen corresponding path program 180 times [2022-03-20 18:37:33,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:33,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729785596] [2022-03-20 18:37:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:33,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:35,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729785596] [2022-03-20 18:37:35,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729785596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:35,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269722128] [2022-03-20 18:37:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:37:35,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:35,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:35,881 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) [2022-03-20 18:37:35,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 18:37:36,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-20 18:37:36,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 18:37:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:36,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269722128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:44,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95, 95] total 190 [2022-03-20 18:37:44,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104900937] [2022-03-20 18:37:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104900937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:44,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 18:37:44,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958427875] [2022-03-20 18:37:44,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:44,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 18:37:44,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 18:37:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17032, Invalid=18878, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 18:37:44,131 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) [2022-03-20 18:37:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:47,651 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-03-20 18:37:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 18:37:47,651 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 [2022-03-20 18:37:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:47,652 INFO L225 Difference]: With dead ends: 200 [2022-03-20 18:37:47,652 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 18:37:47,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5821 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=33878, Invalid=45928, Unknown=0, NotChecked=0, Total=79806 [2022-03-20 18:37:47,655 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 192 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:47,655 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 43 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:37:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 18:37:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-20 18:37:47,715 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) [2022-03-20 18:37:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2022-03-20 18:37:47,715 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 191 [2022-03-20 18:37:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:47,716 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2022-03-20 18:37:47,716 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) [2022-03-20 18:37:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2022-03-20 18:37:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 18:37:47,716 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:47,716 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:47,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 18:37:47,917 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 [2022-03-20 18:37:47,917 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash -787606936, now seen corresponding path program 181 times [2022-03-20 18:37:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:47,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690098544] [2022-03-20 18:37:48,724 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:37:48,724 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:37:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -787606936, now seen corresponding path program 182 times [2022-03-20 18:37:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787152875] [2022-03-20 18:37:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:51,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:37:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:51,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787152875] [2022-03-20 18:37:51,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787152875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:37:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615465256] [2022-03-20 18:37:51,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:37:51,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:51,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:51,462 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) [2022-03-20 18:37:51,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 18:37:51,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:37:51,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:37:51,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 18:37:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:51,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:37:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615465256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:37:59,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:37:59,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 192 [2022-03-20 18:37:59,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:59,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690098544] [2022-03-20 18:37:59,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690098544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:59,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:59,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 18:37:59,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249200656] [2022-03-20 18:37:59,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:59,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 18:37:59,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 18:37:59,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17403, Invalid=19269, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 18:37:59,829 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) [2022-03-20 18:38:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:03,404 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2022-03-20 18:38:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 18:38:03,404 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 [2022-03-20 18:38:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:03,405 INFO L225 Difference]: With dead ends: 202 [2022-03-20 18:38:03,405 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 18:38:03,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5931 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=34618, Invalid=46892, Unknown=0, NotChecked=0, Total=81510 [2022-03-20 18:38:03,408 INFO L913 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:03,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 28 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 18:38:03,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 18:38:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-03-20 18:38:03,487 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) [2022-03-20 18:38:03,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2022-03-20 18:38:03,488 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 193 [2022-03-20 18:38:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:03,488 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2022-03-20 18:38:03,488 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) [2022-03-20 18:38:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2022-03-20 18:38:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 18:38:03,489 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:03,489 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:03,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-20 18:38:03,711 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 [2022-03-20 18:38:03,712 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 124127012, now seen corresponding path program 183 times [2022-03-20 18:38:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:03,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326224023] [2022-03-20 18:38:04,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:38:04,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:38:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash 124127012, now seen corresponding path program 184 times [2022-03-20 18:38:04,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:04,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577124221] [2022-03-20 18:38:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:04,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577124221] [2022-03-20 18:38:06,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577124221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:38:06,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921462983] [2022-03-20 18:38:06,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:38:06,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:38:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:38:06,971 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) [2022-03-20 18:38:06,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 18:38:07,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:38:07,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:38:07,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-20 18:38:07,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:07,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:38:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:15,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921462983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:38:15,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:38:15,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97, 97] total 194 [2022-03-20 18:38:15,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:15,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326224023] [2022-03-20 18:38:15,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326224023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:15,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:15,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 18:38:15,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39920074] [2022-03-20 18:38:15,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:15,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 18:38:15,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:15,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 18:38:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17778, Invalid=19664, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 18:38:15,480 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) [2022-03-20 18:38:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:19,135 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2022-03-20 18:38:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 18:38:19,135 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 [2022-03-20 18:38:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:19,136 INFO L225 Difference]: With dead ends: 204 [2022-03-20 18:38:19,136 INFO L226 Difference]: Without dead ends: 199 [2022-03-20 18:38:19,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6042 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=35366, Invalid=47866, Unknown=0, NotChecked=0, Total=83232 [2022-03-20 18:38:19,140 INFO L913 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 [2022-03-20 18:38:19,140 INFO L914 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] [2022-03-20 18:38:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-20 18:38:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-03-20 18:38:19,202 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) [2022-03-20 18:38:19,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2022-03-20 18:38:19,203 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 195 [2022-03-20 18:38:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:19,203 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2022-03-20 18:38:19,203 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) [2022-03-20 18:38:19,204 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2022-03-20 18:38:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 18:38:19,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:19,204 INFO L499 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:19,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 18:38:19,419 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 [2022-03-20 18:38:19,420 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:19,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 127122656, now seen corresponding path program 185 times [2022-03-20 18:38:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:19,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906426383] [2022-03-20 18:38:19,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:38:19,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:38:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash 127122656, now seen corresponding path program 186 times [2022-03-20 18:38:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:19,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706642959] [2022-03-20 18:38:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:19,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:20,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:22,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:22,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:22,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706642959] [2022-03-20 18:38:22,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706642959] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:38:22,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176834040] [2022-03-20 18:38:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:38:22,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:38:22,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:38:22,836 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) [2022-03-20 18:38:22,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 18:38:23,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-03-20 18:38:23,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:38:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 18:38:23,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:23,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:38:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:31,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176834040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:38:31,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:38:31,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-03-20 18:38:31,559 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906426383] [2022-03-20 18:38:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906426383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:31,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:31,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 18:38:31,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992609600] [2022-03-20 18:38:31,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:31,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 18:38:31,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 18:38:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18157, Invalid=20063, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 18:38:31,562 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) [2022-03-20 18:38:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:35,302 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2022-03-20 18:38:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 18:38:35,303 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 [2022-03-20 18:38:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:35,303 INFO L225 Difference]: With dead ends: 206 [2022-03-20 18:38:35,303 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 18:38:35,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6154 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=36122, Invalid=48850, Unknown=0, NotChecked=0, Total=84972 [2022-03-20 18:38:35,307 INFO L913 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 [2022-03-20 18:38:35,307 INFO L914 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] [2022-03-20 18:38:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 18:38:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-03-20 18:38:35,372 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) [2022-03-20 18:38:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2022-03-20 18:38:35,372 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 197 [2022-03-20 18:38:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:35,372 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2022-03-20 18:38:35,372 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) [2022-03-20 18:38:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2022-03-20 18:38:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 18:38:35,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:35,373 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:35,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 18:38:35,573 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 [2022-03-20 18:38:35,574 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1289030756, now seen corresponding path program 187 times [2022-03-20 18:38:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009271181] [2022-03-20 18:38:36,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:38:36,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:38:36,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1289030756, now seen corresponding path program 188 times [2022-03-20 18:38:36,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:36,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920112125] [2022-03-20 18:38:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:36,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:39,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920112125] [2022-03-20 18:38:39,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920112125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:38:39,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676520428] [2022-03-20 18:38:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:38:39,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:38:39,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:38:39,065 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) [2022-03-20 18:38:39,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 18:38:39,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:38:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:38:39,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-20 18:38:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:39,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:38:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:47,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676520428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:38:47,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:38:47,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-03-20 18:38:47,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009271181] [2022-03-20 18:38:47,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009271181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:47,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:47,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 18:38:47,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740872810] [2022-03-20 18:38:47,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:47,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 18:38:47,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:47,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 18:38:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 18:38:47,896 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) [2022-03-20 18:38:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:51,725 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2022-03-20 18:38:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 18:38:51,726 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 [2022-03-20 18:38:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:51,726 INFO L225 Difference]: With dead ends: 208 [2022-03-20 18:38:51,726 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 18:38:51,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6267 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=36886, Invalid=49844, Unknown=0, NotChecked=0, Total=86730 [2022-03-20 18:38:51,731 INFO L913 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 [2022-03-20 18:38:51,731 INFO L914 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] [2022-03-20 18:38:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 18:38:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-03-20 18:38:51,798 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) [2022-03-20 18:38:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2022-03-20 18:38:51,798 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 199 [2022-03-20 18:38:51,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:51,799 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2022-03-20 18:38:51,799 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) [2022-03-20 18:38:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2022-03-20 18:38:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 18:38:51,799 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:51,799 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:51,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-20 18:38:52,000 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 [2022-03-20 18:38:52,000 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash -707826856, now seen corresponding path program 189 times [2022-03-20 18:38:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:52,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965220067] [2022-03-20 18:38:54,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:38:54,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:38:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash -707826856, now seen corresponding path program 190 times [2022-03-20 18:38:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:54,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476768942] [2022-03-20 18:38:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:57,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:38:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:57,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476768942] [2022-03-20 18:38:57,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476768942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:38:57,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354573619] [2022-03-20 18:38:57,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 18:38:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:38:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:38:57,896 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) [2022-03-20 18:38:57,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 18:38:58,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 18:38:58,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:38:58,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 18:38:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:58,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:39:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:06,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354573619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:39:06,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:39:06,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 200 [2022-03-20 18:39:06,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:06,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965220067] [2022-03-20 18:39:06,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965220067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:06,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:06,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 18:39:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490440836] [2022-03-20 18:39:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:06,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 18:39:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:06,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 18:39:06,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18927, Invalid=20873, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 18:39:06,842 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) [2022-03-20 18:39:10,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:39:10,656 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-03-20 18:39:10,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 18:39:10,656 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 [2022-03-20 18:39:10,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:39:10,657 INFO L225 Difference]: With dead ends: 210 [2022-03-20 18:39:10,657 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 18:39:10,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6381 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=37658, Invalid=50848, Unknown=0, NotChecked=0, Total=88506 [2022-03-20 18:39:10,660 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 202 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-20 18:39:10,661 INFO L914 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] [2022-03-20 18:39:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 18:39:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-03-20 18:39:10,718 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) [2022-03-20 18:39:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2022-03-20 18:39:10,718 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 201 [2022-03-20 18:39:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:39:10,719 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2022-03-20 18:39:10,719 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) [2022-03-20 18:39:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2022-03-20 18:39:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 18:39:10,719 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:39:10,719 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:39:10,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-20 18:39:10,920 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 [2022-03-20 18:39:10,920 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:39:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:39:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -516627436, now seen corresponding path program 191 times [2022-03-20 18:39:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:10,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574442985] [2022-03-20 18:39:11,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:39:11,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:39:11,845 INFO L85 PathProgramCache]: Analyzing trace with hash -516627436, now seen corresponding path program 192 times [2022-03-20 18:39:11,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:39:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971777368] [2022-03-20 18:39:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:39:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:39:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:14,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:39:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:39:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971777368] [2022-03-20 18:39:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971777368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:39:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613395435] [2022-03-20 18:39:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 18:39:14,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:39:14,875 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) [2022-03-20 18:39:14,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 18:39:15,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-03-20 18:39:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:39:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-20 18:39:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:39:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:15,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 18:39:24,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:24,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613395435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 18:39:24,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 18:39:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101, 101] total 202 [2022-03-20 18:39:24,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:39:24,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574442985] [2022-03-20 18:39:24,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574442985] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:39:24,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:39:24,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 18:39:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344070044] [2022-03-20 18:39:24,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:39:24,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 18:39:24,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 18:39:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19318, Invalid=21284, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 18:39:24,086 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) [2022-03-20 18:39:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:39:28,066 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-03-20 18:39:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 18:39:28,067 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 [2022-03-20 18:39:28,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:39:28,067 INFO L225 Difference]: With dead ends: 212 [2022-03-20 18:39:28,067 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 18:39:28,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=38438, Invalid=51862, Unknown=0, NotChecked=0, Total=90300 [2022-03-20 18:39:28,071 INFO L913 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 [2022-03-20 18:39:28,071 INFO L914 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] [2022-03-20 18:39:28,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 18:39:28,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-03-20 18:39:28,138 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) [2022-03-20 18:39:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2022-03-20 18:39:28,139 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 203 [2022-03-20 18:39:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:39:28,139 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2022-03-20 18:39:28,139 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) [2022-03-20 18:39:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2022-03-20 18:39:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 18:39:28,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:39:28,140 INFO L499 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:39:28,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-20 18:39:28,340 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 [2022-03-20 18:39:28,340 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:39:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:39:28,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1457578544, now seen corresponding path program 193 times [2022-03-20 18:39:28,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:39:28,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401893652] [2022-03-20 18:39:28,852 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Basisvector must contain only constants! [2022-03-20 18:39:28,852 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 18:39:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1457578544, now seen corresponding path program 194 times [2022-03-20 18:39:28,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:39:28,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999182765] [2022-03-20 18:39:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:39:28,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:39:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:31,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 18:39:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:39:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:39:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999182765] [2022-03-20 18:39:31,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999182765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 18:39:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288669757] [2022-03-20 18:39:31,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:39:31,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:39:31,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:39:31,954 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) [2022-03-20 18:39:31,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 18:39:32,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 18:39:32,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:39:32,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 18:39:32,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:39:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:39:32,462 INFO L328 TraceCheckSpWp]: Computing backward predicates...