/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:33:33,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:33:33,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:33:33,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:33:33,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:33:33,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:33:33,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:33:33,260 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:33:33,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:33:33,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:33:33,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:33:33,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:33:33,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:33:33,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:33:33,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:33:33,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:33:33,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:33:33,272 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:33:33,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:33:33,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:33:33,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:33:33,273 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:33:33,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:33:33,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:33:33,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:33:33,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:33:33,488 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:33:33,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-04-06 19:33:33,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b80bfd09/f6b6138043464d858b3618e5afeadcca/FLAG97e5e8c39 [2022-04-06 19:33:33,854 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:33:33,855 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-04-06 19:33:33,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b80bfd09/f6b6138043464d858b3618e5afeadcca/FLAG97e5e8c39 [2022-04-06 19:33:34,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b80bfd09/f6b6138043464d858b3618e5afeadcca [2022-04-06 19:33:34,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:33:34,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:33:34,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:33:34,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:33:34,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:33:34,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47003a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34, skipping insertion in model container [2022-04-06 19:33:34,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:33:34,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:33:34,436 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-04-06 19:33:34,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:33:34,456 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:33:34,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-04-06 19:33:34,472 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:33:34,481 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:33:34,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34 WrapperNode [2022-04-06 19:33:34,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:33:34,483 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:33:34,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:33:34,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:33:34,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:33:34,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:33:34,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:33:34,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:33:34,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (1/1) ... [2022-04-06 19:33:34,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:33:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:34,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:33:34,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:33:34,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:33:34,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:33:34,561 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:33:34,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 19:33:34,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:33:34,561 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 19:33:34,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:33:34,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:33:34,610 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:33:34,611 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:33:34,815 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:33:34,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:33:34,820 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-04-06 19:33:34,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:33:34 BoogieIcfgContainer [2022-04-06 19:33:34,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:33:34,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:33:34,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:33:34,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:33:34,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:33:34" (1/3) ... [2022-04-06 19:33:34,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad35eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:33:34, skipping insertion in model container [2022-04-06 19:33:34,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:33:34" (2/3) ... [2022-04-06 19:33:34,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ad35eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:33:34, skipping insertion in model container [2022-04-06 19:33:34,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:33:34" (3/3) ... [2022-04-06 19:33:34,827 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-04-06 19:33:34,830 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:33:34,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:33:34,857 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:33:34,862 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:33:34,862 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:33:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:33:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 19:33:34,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:34,885 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:34,886 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:34,906 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-04-06 19:33:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135186839] [2022-04-06 19:33:34,919 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:33:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 2 times [2022-04-06 19:33:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191421061] [2022-04-06 19:33:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:35,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:35,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191421061] [2022-04-06 19:33:35,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191421061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:35,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:33:35,123 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:35,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135186839] [2022-04-06 19:33:35,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135186839] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:35,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:33:35,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713030570] [2022-04-06 19:33:35,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:35,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:33:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:35,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:33:35,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:33:35,151 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:35,209 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-04-06 19:33:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:33:35,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-04-06 19:33:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:35,216 INFO L225 Difference]: With dead ends: 66 [2022-04-06 19:33:35,216 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:33:35,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:33:35,223 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:35,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:33:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 19:33:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-04-06 19:33:35,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-04-06 19:33:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:35,265 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-04-06 19:33:35,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-04-06 19:33:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 19:33:35,267 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:35,267 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:35,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:33:35,267 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:35,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:35,269 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-04-06 19:33:35,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:35,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797388311] [2022-04-06 19:33:35,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:33:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 2 times [2022-04-06 19:33:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912972310] [2022-04-06 19:33:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:35,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:35,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912972310] [2022-04-06 19:33:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912972310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:35,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:33:35,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:35,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797388311] [2022-04-06 19:33:35,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797388311] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:35,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:33:35,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948831451] [2022-04-06 19:33:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:35,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:33:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:33:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:33:35,384 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:35,470 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-04-06 19:33:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:33:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 19:33:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:35,474 INFO L225 Difference]: With dead ends: 67 [2022-04-06 19:33:35,476 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 19:33:35,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:33:35,482 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:35,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:35,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 19:33:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-04-06 19:33:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 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) [2022-04-06 19:33:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-04-06 19:33:35,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-04-06 19:33:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:35,494 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-04-06 19:33:35,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-04-06 19:33:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 19:33:35,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:35,496 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:35,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:33:35,496 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-04-06 19:33:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:35,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729193325] [2022-04-06 19:33:35,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:35,510 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 2 times [2022-04-06 19:33:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:35,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962598020] [2022-04-06 19:33:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:35,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:33:35,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962598020] [2022-04-06 19:33:35,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962598020] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273724200] [2022-04-06 19:33:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:35,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:35,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:35,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:33:35,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 19:33:35,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:35,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:33:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:33:35,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:33:35,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273724200] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:33:35,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-04-06 19:33:35,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729193325] [2022-04-06 19:33:35,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729193325] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:35,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:35,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:33:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998782767] [2022-04-06 19:33:35,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:35,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:33:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:33:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:33:35,785 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:35,826 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-04-06 19:33:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:33:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 19:33:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:35,831 INFO L225 Difference]: With dead ends: 55 [2022-04-06 19:33:35,831 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:33:35,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:33:35,833 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:35,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 152 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:33:35,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-04-06 19:33:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-04-06 19:33:35,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-04-06 19:33:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:35,852 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-04-06 19:33:35,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-04-06 19:33:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 19:33:35,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:35,853 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:35,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:33:36,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:36,054 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 1 times [2022-04-06 19:33:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:36,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1935798576] [2022-04-06 19:33:36,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:36,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1521854123, now seen corresponding path program 2 times [2022-04-06 19:33:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610804528] [2022-04-06 19:33:36,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:36,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:36,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:33:36,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:36,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610804528] [2022-04-06 19:33:36,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610804528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:36,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594635621] [2022-04-06 19:33:36,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:36,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:36,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:33:36,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:36,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:33:36,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:33:36,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:33:36,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594635621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:36,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:33:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 19:33:36,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1935798576] [2022-04-06 19:33:36,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1935798576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:36,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:36,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:33:36,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573421012] [2022-04-06 19:33:36,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:36,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:33:36,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:36,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:33:36,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:33:36,279 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:36,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:36,307 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-04-06 19:33:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:33:36,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 19:33:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:36,309 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:33:36,310 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 19:33:36,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:33:36,312 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:36,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 69 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 19:33:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-04-06 19:33:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 42 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) [2022-04-06 19:33:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-04-06 19:33:36,324 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 28 [2022-04-06 19:33:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:36,325 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-04-06 19:33:36,325 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-04-06 19:33:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:33:36,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:36,326 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:36,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:36,558 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:33:36,558 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:36,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 1 times [2022-04-06 19:33:36,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:36,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307027456] [2022-04-06 19:33:36,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:36,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2104041838, now seen corresponding path program 2 times [2022-04-06 19:33:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:36,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277513233] [2022-04-06 19:33:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:36,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:36,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:33:36,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277513233] [2022-04-06 19:33:36,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277513233] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:36,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601474126] [2022-04-06 19:33:36,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:36,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:36,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:36,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:33:36,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:36,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:33:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:36,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-06 19:33:36,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 19:33:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:33:36,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:33:36,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601474126] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:36,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:33:36,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-04-06 19:33:36,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307027456] [2022-04-06 19:33:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307027456] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:36,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:36,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:33:36,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663602450] [2022-04-06 19:33:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:36,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:33:36,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:33:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:33:36,943 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:37,018 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2022-04-06 19:33:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:33:37,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:33:37,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:37,019 INFO L225 Difference]: With dead ends: 67 [2022-04-06 19:33:37,019 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 19:33:37,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:33:37,020 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:37,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 19:33:37,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-04-06 19:33:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-04-06 19:33:37,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2022-04-06 19:33:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:37,025 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-04-06 19:33:37,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-04-06 19:33:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 19:33:37,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:37,025 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:37,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-06 19:33:37,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:37,239 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 1 times [2022-04-06 19:33:37,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:37,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1940252490] [2022-04-06 19:33:37,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:37,242 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 130872262, now seen corresponding path program 2 times [2022-04-06 19:33:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:37,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168529490] [2022-04-06 19:33:37,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:37,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:37,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:33:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168529490] [2022-04-06 19:33:37,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168529490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68736713] [2022-04-06 19:33:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:37,316 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:37,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:33:37,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:37,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:37,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:33:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:37,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-04-06 19:33:37,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:33:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:33:37,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:33:37,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68736713] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:37,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:33:37,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 9] total 16 [2022-04-06 19:33:37,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1940252490] [2022-04-06 19:33:37,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1940252490] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:37,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:37,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:33:37,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982093075] [2022-04-06 19:33:37,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:37,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:33:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:33:37,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:33:37,633 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:37,712 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-04-06 19:33:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:33:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-04-06 19:33:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:37,713 INFO L225 Difference]: With dead ends: 72 [2022-04-06 19:33:37,713 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 19:33:37,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:33:37,714 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:37,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 19:33:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2022-04-06 19:33:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-04-06 19:33:37,727 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 30 [2022-04-06 19:33:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:37,728 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-04-06 19:33:37,728 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:37,728 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-04-06 19:33:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:33:37,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:37,733 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:37,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 19:33:37,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:37,949 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:37,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 1 times [2022-04-06 19:33:37,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:37,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1136740876] [2022-04-06 19:33:37,951 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:37,951 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1933277107, now seen corresponding path program 2 times [2022-04-06 19:33:37,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:37,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728188284] [2022-04-06 19:33:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:38,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:33:38,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:38,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728188284] [2022-04-06 19:33:38,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728188284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:38,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142717236] [2022-04-06 19:33:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:38,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:38,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:38,025 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:38,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:33:38,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:38,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:33:38,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:33:38,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:33:38,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142717236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:38,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:38,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 9 [2022-04-06 19:33:38,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:38,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1136740876] [2022-04-06 19:33:38,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1136740876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:38,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:38,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:33:38,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111262327] [2022-04-06 19:33:38,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:38,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:33:38,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:38,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:33:38,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:33:38,177 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:38,272 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2022-04-06 19:33:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:33:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 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 31 [2022-04-06 19:33:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:38,274 INFO L225 Difference]: With dead ends: 133 [2022-04-06 19:33:38,274 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 19:33:38,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:33:38,275 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 95 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:38,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 19:33:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 49. [2022-04-06 19:33:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-04-06 19:33:38,301 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 31 [2022-04-06 19:33:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:38,301 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-04-06 19:33:38,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-04-06 19:33:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:33:38,301 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:38,301 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:38,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:38,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:38,502 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 3 times [2022-04-06 19:33:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1196221926] [2022-04-06 19:33:38,504 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:38,504 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:38,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1557440111, now seen corresponding path program 4 times [2022-04-06 19:33:38,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:38,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645238162] [2022-04-06 19:33:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:38,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:33:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645238162] [2022-04-06 19:33:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645238162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944689160] [2022-04-06 19:33:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:33:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:38,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:38,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:33:38,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:33:38,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:38,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:33:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:33:38,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:33:38,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944689160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:38,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:38,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 12 [2022-04-06 19:33:38,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1196221926] [2022-04-06 19:33:38,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1196221926] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:38,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:38,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:33:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385330488] [2022-04-06 19:33:38,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:38,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:33:38,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:38,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:33:38,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:33:38,732 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-04-06 19:33:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:38,858 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2022-04-06 19:33:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:33:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 33 [2022-04-06 19:33:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:38,860 INFO L225 Difference]: With dead ends: 160 [2022-04-06 19:33:38,860 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 19:33:38,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:33:38,860 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:38,861 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 19:33:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 51. [2022-04-06 19:33:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-04-06 19:33:38,870 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 33 [2022-04-06 19:33:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:38,870 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-04-06 19:33:38,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2022-04-06 19:33:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-04-06 19:33:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:33:38,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:38,871 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:38,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 19:33:39,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:39,087 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:39,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:39,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 5 times [2022-04-06 19:33:39,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:39,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183868766] [2022-04-06 19:33:39,089 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:39,089 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1767228433, now seen corresponding path program 6 times [2022-04-06 19:33:39,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:39,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351374567] [2022-04-06 19:33:39,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:39,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:39,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:33:39,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351374567] [2022-04-06 19:33:39,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351374567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:39,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621429195] [2022-04-06 19:33:39,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:33:39,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:39,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:39,205 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:39,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:33:39,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:33:39,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:39,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 19:33:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 19:33:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 19:33:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621429195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:39,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:39,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 13 [2022-04-06 19:33:39,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:39,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183868766] [2022-04-06 19:33:39,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183868766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:39,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:39,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:33:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518199266] [2022-04-06 19:33:39,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:39,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:33:39,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:33:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:33:39,373 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-04-06 19:33:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:39,535 INFO L93 Difference]: Finished difference Result 187 states and 253 transitions. [2022-04-06 19:33:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:33:39,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 35 [2022-04-06 19:33:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:39,536 INFO L225 Difference]: With dead ends: 187 [2022-04-06 19:33:39,536 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 19:33:39,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:33:39,537 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:39,537 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 72 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 19:33:39,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 53. [2022-04-06 19:33:39,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2022-04-06 19:33:39,555 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 35 [2022-04-06 19:33:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:39,556 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2022-04-06 19:33:39,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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) [2022-04-06 19:33:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2022-04-06 19:33:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:33:39,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:39,558 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:39,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:39,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:39,766 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:39,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:39,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 7 times [2022-04-06 19:33:39,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:39,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277667896] [2022-04-06 19:33:39,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:39,768 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:39,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1510342963, now seen corresponding path program 8 times [2022-04-06 19:33:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:39,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923883256] [2022-04-06 19:33:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:39,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:33:39,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923883256] [2022-04-06 19:33:39,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923883256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:39,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470146604] [2022-04-06 19:33:39,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:39,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:39,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:39,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:33:39,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:39,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 19:33:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 19:33:39,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 19:33:40,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470146604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:40,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:40,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 10] total 19 [2022-04-06 19:33:40,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:40,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277667896] [2022-04-06 19:33:40,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277667896] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:40,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:40,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:33:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680524175] [2022-04-06 19:33:40,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:40,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:33:40,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:40,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:33:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:33:40,097 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:40,363 INFO L93 Difference]: Finished difference Result 214 states and 291 transitions. [2022-04-06 19:33:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:33:40,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 37 [2022-04-06 19:33:40,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:40,364 INFO L225 Difference]: With dead ends: 214 [2022-04-06 19:33:40,364 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 19:33:40,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:33:40,365 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 238 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:40,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 74 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:33:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 19:33:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 55. [2022-04-06 19:33:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-04-06 19:33:40,377 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 37 [2022-04-06 19:33:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:40,378 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-04-06 19:33:40,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-04-06 19:33:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:33:40,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:40,378 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:40,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:40,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:33:40,595 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:40,596 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 9 times [2022-04-06 19:33:40,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:40,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [192676719] [2022-04-06 19:33:40,597 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:40,597 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash 543457835, now seen corresponding path program 10 times [2022-04-06 19:33:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:40,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484812921] [2022-04-06 19:33:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:40,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:40,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484812921] [2022-04-06 19:33:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484812921] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:40,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116204272] [2022-04-06 19:33:40,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:33:40,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:40,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:40,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:40,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:33:40,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:33:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:33:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 19:33:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:40,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116204272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:40,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:40,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-04-06 19:33:40,845 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [192676719] [2022-04-06 19:33:40,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [192676719] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:40,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:40,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:33:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223236753] [2022-04-06 19:33:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:40,846 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:33:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:33:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:33:40,846 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:40,931 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-04-06 19:33:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:33:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 19:33:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:40,932 INFO L225 Difference]: With dead ends: 110 [2022-04-06 19:33:40,932 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 19:33:40,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:33:40,933 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:40,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:33:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 19:33:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2022-04-06 19:33:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2022-04-06 19:33:40,949 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 39 [2022-04-06 19:33:40,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:40,949 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2022-04-06 19:33:40,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:40,950 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2022-04-06 19:33:40,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 19:33:40,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:40,950 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:40,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:41,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:41,163 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 11 times [2022-04-06 19:33:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:41,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995830071] [2022-04-06 19:33:41,165 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:41,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash -334288281, now seen corresponding path program 12 times [2022-04-06 19:33:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:41,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127934451] [2022-04-06 19:33:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:41,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:41,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127934451] [2022-04-06 19:33:41,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127934451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:41,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014686213] [2022-04-06 19:33:41,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:33:41,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:41,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:41,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:41,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:33:41,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:33:41,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:41,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 19:33:41,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:41,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014686213] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:41,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:41,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 12 [2022-04-06 19:33:41,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995830071] [2022-04-06 19:33:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995830071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:41,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:41,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:33:41,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011925190] [2022-04-06 19:33:41,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:41,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:33:41,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:33:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:33:41,487 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:41,754 INFO L93 Difference]: Finished difference Result 255 states and 333 transitions. [2022-04-06 19:33:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:33:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 19:33:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:41,756 INFO L225 Difference]: With dead ends: 255 [2022-04-06 19:33:41,756 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 19:33:41,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:33:41,756 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:41,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 62 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:41,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 19:33:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 77. [2022-04-06 19:33:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 72 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2022-04-06 19:33:41,781 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 42 [2022-04-06 19:33:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:41,781 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2022-04-06 19:33:41,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2022-04-06 19:33:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 19:33:41,781 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:41,781 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:41,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:41,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:33:41,999 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:42,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 13 times [2022-04-06 19:33:42,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:42,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [439763439] [2022-04-06 19:33:42,001 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:42,001 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688413, now seen corresponding path program 14 times [2022-04-06 19:33:42,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152964854] [2022-04-06 19:33:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:42,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152964854] [2022-04-06 19:33:42,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152964854] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:42,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856769195] [2022-04-06 19:33:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:42,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:42,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:42,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:42,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:33:42,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:33:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:42,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:33:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 19:33:42,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:42,463 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:33:42,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:33:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:42,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856769195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:42,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:42,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 23 [2022-04-06 19:33:42,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:42,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [439763439] [2022-04-06 19:33:42,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [439763439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:42,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:42,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:33:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196402021] [2022-04-06 19:33:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:42,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:33:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:42,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:33:42,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:33:42,512 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:42,820 INFO L93 Difference]: Finished difference Result 270 states and 352 transitions. [2022-04-06 19:33:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:33:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 19:33:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:42,821 INFO L225 Difference]: With dead ends: 270 [2022-04-06 19:33:42,821 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 19:33:42,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:33:42,822 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:42,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 100 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:33:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 19:33:42,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 79. [2022-04-06 19:33:42,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 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) [2022-04-06 19:33:42,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2022-04-06 19:33:42,839 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 46 [2022-04-06 19:33:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:42,839 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2022-04-06 19:33:42,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:42,839 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2022-04-06 19:33:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 19:33:42,840 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:42,840 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:42,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:43,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:33:43,056 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1875303096, now seen corresponding path program 15 times [2022-04-06 19:33:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:43,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744550532] [2022-04-06 19:33:43,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:43,058 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:43,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1875303096, now seen corresponding path program 16 times [2022-04-06 19:33:43,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:43,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518079808] [2022-04-06 19:33:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:43,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:43,137 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:43,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:43,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518079808] [2022-04-06 19:33:43,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518079808] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:43,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011021663] [2022-04-06 19:33:43,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:33:43,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:43,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:43,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:43,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:33:43,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:33:43,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:33:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:43,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:33:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:33:43,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:43,531 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:33:43,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:33:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:33:43,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011021663] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:43,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:43,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 23 [2022-04-06 19:33:43,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:43,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744550532] [2022-04-06 19:33:43,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744550532] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:43,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:43,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:33:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312315911] [2022-04-06 19:33:43,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:43,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:33:43,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:43,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:33:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:33:43,582 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:43,984 INFO L93 Difference]: Finished difference Result 317 states and 415 transitions. [2022-04-06 19:33:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:33:43,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-04-06 19:33:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:43,985 INFO L225 Difference]: With dead ends: 317 [2022-04-06 19:33:43,985 INFO L226 Difference]: Without dead ends: 291 [2022-04-06 19:33:43,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:33:43,987 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:43,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 124 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:33:43,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-06 19:33:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 81. [2022-04-06 19:33:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2763157894736843) internal successors, (97), 76 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2022-04-06 19:33:44,004 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 48 [2022-04-06 19:33:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:44,004 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2022-04-06 19:33:44,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2022-04-06 19:33:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 19:33:44,005 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:44,005 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:44,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:44,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:33:44,221 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:44,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 17 times [2022-04-06 19:33:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:44,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555174570] [2022-04-06 19:33:44,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:44,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1941482157, now seen corresponding path program 18 times [2022-04-06 19:33:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:44,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649879581] [2022-04-06 19:33:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:33:44,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:44,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649879581] [2022-04-06 19:33:44,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649879581] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:44,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970604603] [2022-04-06 19:33:44,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:33:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:44,331 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:44,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:33:44,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:33:44,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 19:33:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:44,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:33:44,581 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:33:44,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 19:33:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 19:33:44,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:33:44,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970604603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:44,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:33:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 17 [2022-04-06 19:33:44,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:44,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555174570] [2022-04-06 19:33:44,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555174570] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:44,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:44,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:33:44,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343406995] [2022-04-06 19:33:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:44,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:33:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:33:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:33:44,612 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:44,707 INFO L93 Difference]: Finished difference Result 125 states and 157 transitions. [2022-04-06 19:33:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:33:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 19:33:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:44,708 INFO L225 Difference]: With dead ends: 125 [2022-04-06 19:33:44,709 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 19:33:44,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:33:44,714 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:44,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 107 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-04-06 19:33:44,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 19:33:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2022-04-06 19:33:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:44,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-04-06 19:33:44,741 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 50 [2022-04-06 19:33:44,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:44,741 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-04-06 19:33:44,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-04-06 19:33:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:33:44,742 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:44,742 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:44,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:44,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:33:44,948 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:44,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:44,949 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 1 times [2022-04-06 19:33:44,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:44,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137287798] [2022-04-06 19:33:44,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:44,950 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash 28908263, now seen corresponding path program 2 times [2022-04-06 19:33:44,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861104782] [2022-04-06 19:33:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:44,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:45,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:45,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:45,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861104782] [2022-04-06 19:33:45,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861104782] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:45,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557587802] [2022-04-06 19:33:45,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:45,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:45,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:45,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:33:45,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:33:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 19:33:45,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:45,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557587802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:45,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:45,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 23 [2022-04-06 19:33:45,501 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137287798] [2022-04-06 19:33:45,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137287798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:45,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:45,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:33:45,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558266964] [2022-04-06 19:33:45,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:45,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:33:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:33:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:33:45,502 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:46,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:46,063 INFO L93 Difference]: Finished difference Result 188 states and 243 transitions. [2022-04-06 19:33:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:33:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:33:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:46,064 INFO L225 Difference]: With dead ends: 188 [2022-04-06 19:33:46,064 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 19:33:46,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:33:46,065 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 195 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:46,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 144 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:33:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 19:33:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 116. [2022-04-06 19:33:46,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 111 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 148 transitions. [2022-04-06 19:33:46,106 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 148 transitions. Word has length 51 [2022-04-06 19:33:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:46,107 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 148 transitions. [2022-04-06 19:33:46,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 148 transitions. [2022-04-06 19:33:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:33:46,107 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:46,107 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:46,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 19:33:46,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:46,340 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:46,340 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 1 times [2022-04-06 19:33:46,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:46,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453811369] [2022-04-06 19:33:46,342 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:46,342 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:46,342 INFO L85 PathProgramCache]: Analyzing trace with hash -364118747, now seen corresponding path program 2 times [2022-04-06 19:33:46,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:46,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723712195] [2022-04-06 19:33:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:46,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:46,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 19:33:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:46,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723712195] [2022-04-06 19:33:46,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723712195] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:46,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359779207] [2022-04-06 19:33:46,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:46,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:46,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:46,595 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:46,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:33:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:46,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 19:33:46,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:47,024 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:33:47,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:33:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:33:47,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:51,977 INFO L356 Elim1Store]: treesize reduction 31, result has 68.0 percent of original size [2022-04-06 19:33:51,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 73 [2022-04-06 19:33:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359779207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:52,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 29 [2022-04-06 19:33:52,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:52,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453811369] [2022-04-06 19:33:52,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453811369] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:52,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:33:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343678789] [2022-04-06 19:33:52,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:52,116 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:33:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:33:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=691, Unknown=9, NotChecked=0, Total=812 [2022-04-06 19:33:52,116 INFO L87 Difference]: Start difference. First operand 116 states and 148 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-04-06 19:33:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:52,416 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2022-04-06 19:33:52,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:33:52,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 51 [2022-04-06 19:33:52,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:52,417 INFO L225 Difference]: With dead ends: 197 [2022-04-06 19:33:52,417 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 19:33:52,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=153, Invalid=1028, Unknown=9, NotChecked=0, Total=1190 [2022-04-06 19:33:52,418 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:52,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 19:33:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-04-06 19:33:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.275) internal successors, (153), 120 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2022-04-06 19:33:52,461 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 51 [2022-04-06 19:33:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:52,461 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2022-04-06 19:33:52,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-04-06 19:33:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2022-04-06 19:33:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:33:52,461 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:52,461 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:52,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 19:33:52,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:33:52,677 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 1 times [2022-04-06 19:33:52,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:52,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1885502249] [2022-04-06 19:33:52,679 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:52,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash 247762981, now seen corresponding path program 2 times [2022-04-06 19:33:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:52,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023841772] [2022-04-06 19:33:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:52,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 19:33:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023841772] [2022-04-06 19:33:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023841772] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969904024] [2022-04-06 19:33:52,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:52,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:52,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:52,991 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:53,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:33:53,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:53,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 19:33:53,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:53,402 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:33:53,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:33:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:33:53,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:57,699 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:33:57,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-04-06 19:33:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:33:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969904024] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:57,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:57,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 29 [2022-04-06 19:33:57,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1885502249] [2022-04-06 19:33:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1885502249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:57,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:57,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:33:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307923151] [2022-04-06 19:33:57,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:57,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:33:57,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:57,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:33:57,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=688, Unknown=8, NotChecked=0, Total=812 [2022-04-06 19:33:57,816 INFO L87 Difference]: Start difference. First operand 125 states and 157 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:58,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:58,172 INFO L93 Difference]: Finished difference Result 162 states and 203 transitions. [2022-04-06 19:33:58,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:33:58,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:33:58,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:58,173 INFO L225 Difference]: With dead ends: 162 [2022-04-06 19:33:58,173 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 19:33:58,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=164, Invalid=1018, Unknown=8, NotChecked=0, Total=1190 [2022-04-06 19:33:58,174 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:58,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 58 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:58,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 19:33:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2022-04-06 19:33:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.255813953488372) internal successors, (162), 129 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2022-04-06 19:33:58,221 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 51 [2022-04-06 19:33:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:58,221 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2022-04-06 19:33:58,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2022-04-06 19:33:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:33:58,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:58,222 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:58,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:33:58,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:33:58,439 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:33:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:33:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-04-06 19:33:58,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534723487] [2022-04-06 19:33:58,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:33:58,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:33:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 2 times [2022-04-06 19:33:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:33:58,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901840162] [2022-04-06 19:33:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:33:58,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:33:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:33:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:33:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:33:58,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:33:58,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901840162] [2022-04-06 19:33:58,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901840162] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:33:58,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433412582] [2022-04-06 19:33:58,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:33:58,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:33:58,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:33:58,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:33:58,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:33:58,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:33:58,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:33:58,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:33:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:33:59,108 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:33:59,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:33:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:33:59,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:33:59,259 INFO L356 Elim1Store]: treesize reduction 27, result has 68.2 percent of original size [2022-04-06 19:33:59,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 65 [2022-04-06 19:33:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:33:59,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433412582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:33:59,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:33:59,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2022-04-06 19:33:59,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:33:59,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534723487] [2022-04-06 19:33:59,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534723487] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:33:59,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:33:59,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:33:59,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060191840] [2022-04-06 19:33:59,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:33:59,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:33:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:33:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:33:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:33:59,348 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:33:59,751 INFO L93 Difference]: Finished difference Result 372 states and 477 transitions. [2022-04-06 19:33:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:33:59,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-04-06 19:33:59,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:33:59,753 INFO L225 Difference]: With dead ends: 372 [2022-04-06 19:33:59,753 INFO L226 Difference]: Without dead ends: 318 [2022-04-06 19:33:59,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:33:59,754 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 192 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:33:59,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 43 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:33:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-06 19:33:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 187. [2022-04-06 19:33:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.2527472527472527) internal successors, (228), 182 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2022-04-06 19:33:59,825 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 51 [2022-04-06 19:33:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:33:59,826 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2022-04-06 19:33:59,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:33:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2022-04-06 19:33:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:33:59,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:33:59,827 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:33:59,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:00,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:00,044 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 3 times [2022-04-06 19:34:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:00,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877783164] [2022-04-06 19:34:00,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:00,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 4 times [2022-04-06 19:34:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:00,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708664859] [2022-04-06 19:34:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:00,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:34:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708664859] [2022-04-06 19:34:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708664859] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057274710] [2022-04-06 19:34:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:00,584 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:00,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:34:00,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:00,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 19:34:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:00,831 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:34:00,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:34:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:34:00,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:00,973 INFO L356 Elim1Store]: treesize reduction 29, result has 68.1 percent of original size [2022-04-06 19:34:00,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 69 [2022-04-06 19:34:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057274710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:01,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 11] total 31 [2022-04-06 19:34:01,089 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877783164] [2022-04-06 19:34:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877783164] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:01,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:34:01,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903049827] [2022-04-06 19:34:01,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:01,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:34:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:34:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:01,090 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2022-04-06 19:34:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:02,335 INFO L93 Difference]: Finished difference Result 856 states and 1103 transitions. [2022-04-06 19:34:02,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:34:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 51 [2022-04-06 19:34:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:02,337 INFO L225 Difference]: With dead ends: 856 [2022-04-06 19:34:02,337 INFO L226 Difference]: Without dead ends: 670 [2022-04-06 19:34:02,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:34:02,339 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 291 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:02,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 54 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:02,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-04-06 19:34:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 357. [2022-04-06 19:34:02,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.2897727272727273) internal successors, (454), 352 states have internal predecessors, (454), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 458 transitions. [2022-04-06 19:34:02,481 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 458 transitions. Word has length 51 [2022-04-06 19:34:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:02,481 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 458 transitions. [2022-04-06 19:34:02,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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) [2022-04-06 19:34:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 458 transitions. [2022-04-06 19:34:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:34:02,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:02,482 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:02,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:02,684 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:02,684 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-04-06 19:34:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:02,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204420509] [2022-04-06 19:34:02,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:02,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 2 times [2022-04-06 19:34:02,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:02,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16551749] [2022-04-06 19:34:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:03,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:34:03,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16551749] [2022-04-06 19:34:03,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16551749] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176586455] [2022-04-06 19:34:03,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:03,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:03,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:03,026 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:03,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:34:03,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:03,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:34:03,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:03,291 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:34:03,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 19:34:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:34:03,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:03,434 INFO L356 Elim1Store]: treesize reduction 19, result has 77.6 percent of original size [2022-04-06 19:34:03,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 73 [2022-04-06 19:34:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:34:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176586455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:03,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:03,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 19 [2022-04-06 19:34:03,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:03,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204420509] [2022-04-06 19:34:03,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204420509] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:03,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:03,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:03,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081531237] [2022-04-06 19:34:03,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:03,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:03,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:03,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:34:03,508 INFO L87 Difference]: Start difference. First operand 357 states and 458 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:03,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:03,999 INFO L93 Difference]: Finished difference Result 579 states and 760 transitions. [2022-04-06 19:34:03,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:03,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 51 [2022-04-06 19:34:04,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:04,001 INFO L225 Difference]: With dead ends: 579 [2022-04-06 19:34:04,001 INFO L226 Difference]: Without dead ends: 535 [2022-04-06 19:34:04,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:34:04,002 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 137 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:04,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 51 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-04-06 19:34:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 367. [2022-04-06 19:34:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.281767955801105) internal successors, (464), 362 states have internal predecessors, (464), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 468 transitions. [2022-04-06 19:34:04,156 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 468 transitions. Word has length 51 [2022-04-06 19:34:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:04,156 INFO L478 AbstractCegarLoop]: Abstraction has 367 states and 468 transitions. [2022-04-06 19:34:04,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:04,156 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 468 transitions. [2022-04-06 19:34:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:34:04,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:04,157 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:04,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:04,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:04,362 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:04,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 3 times [2022-04-06 19:34:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:04,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [699751324] [2022-04-06 19:34:04,365 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:04,365 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 4 times [2022-04-06 19:34:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:04,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541120376] [2022-04-06 19:34:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:04,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:04,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:04,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541120376] [2022-04-06 19:34:04,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541120376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706007863] [2022-04-06 19:34:04,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:04,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:04,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:04,709 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:04,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:34:04,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:04,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 19:34:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:04,993 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:34:04,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:34:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 19:34:05,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:06,798 INFO L356 Elim1Store]: treesize reduction 23, result has 76.3 percent of original size [2022-04-06 19:34:06,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 81 [2022-04-06 19:34:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706007863] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:06,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 27 [2022-04-06 19:34:06,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:06,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [699751324] [2022-04-06 19:34:06,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [699751324] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:06,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:06,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:06,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710076096] [2022-04-06 19:34:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:06,905 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:06,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=568, Unknown=3, NotChecked=0, Total=702 [2022-04-06 19:34:06,906 INFO L87 Difference]: Start difference. First operand 367 states and 468 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:07,538 INFO L93 Difference]: Finished difference Result 765 states and 982 transitions. [2022-04-06 19:34:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:34:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:34:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:07,540 INFO L225 Difference]: With dead ends: 765 [2022-04-06 19:34:07,540 INFO L226 Difference]: Without dead ends: 496 [2022-04-06 19:34:07,540 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=321, Invalid=1236, Unknown=3, NotChecked=0, Total=1560 [2022-04-06 19:34:07,541 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 199 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:07,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 50 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-04-06 19:34:07,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 394. [2022-04-06 19:34:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.275064267352185) internal successors, (496), 389 states have internal predecessors, (496), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 500 transitions. [2022-04-06 19:34:07,716 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 500 transitions. Word has length 51 [2022-04-06 19:34:07,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:07,716 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 500 transitions. [2022-04-06 19:34:07,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:07,716 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 500 transitions. [2022-04-06 19:34:07,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 19:34:07,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:07,717 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:07,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:07,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:34:07,920 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 1 times [2022-04-06 19:34:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:07,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780720796] [2022-04-06 19:34:07,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:07,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-04-06 19:34:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:07,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646323890] [2022-04-06 19:34:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 19:34:07,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646323890] [2022-04-06 19:34:07,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646323890] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408235336] [2022-04-06 19:34:07,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:07,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:07,984 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:07,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:34:08,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 19:34:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 19:34:08,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-04-06 19:34:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408235336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:08,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2022-04-06 19:34:08,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780720796] [2022-04-06 19:34:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780720796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:08,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:08,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:34:08,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822155877] [2022-04-06 19:34:08,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:08,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:34:08,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:34:08,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:34:08,254 INFO L87 Difference]: Start difference. First operand 394 states and 500 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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) [2022-04-06 19:34:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:08,514 INFO L93 Difference]: Finished difference Result 733 states and 928 transitions. [2022-04-06 19:34:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:34:08,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 54 [2022-04-06 19:34:08,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:08,515 INFO L225 Difference]: With dead ends: 733 [2022-04-06 19:34:08,516 INFO L226 Difference]: Without dead ends: 382 [2022-04-06 19:34:08,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:34:08,519 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:08,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:08,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-04-06 19:34:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 354. [2022-04-06 19:34:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 349 states have (on average 1.186246418338109) internal successors, (414), 349 states have internal predecessors, (414), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 418 transitions. [2022-04-06 19:34:08,677 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 418 transitions. Word has length 54 [2022-04-06 19:34:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:08,677 INFO L478 AbstractCegarLoop]: Abstraction has 354 states and 418 transitions. [2022-04-06 19:34:08,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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) [2022-04-06 19:34:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 418 transitions. [2022-04-06 19:34:08,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 19:34:08,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:08,678 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:08,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:08,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:34:08,880 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:08,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-04-06 19:34:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:08,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1106768370] [2022-04-06 19:34:08,881 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:08,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 4 times [2022-04-06 19:34:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:08,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998094140] [2022-04-06 19:34:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:08,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 19:34:08,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998094140] [2022-04-06 19:34:08,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998094140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:08,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179341720] [2022-04-06 19:34:08,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:08,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:08,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:08,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:34:09,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:09,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:09,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:34:09,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:09,562 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:34:09,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:34:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:34:09,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:12,697 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-04-06 19:34:12,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-04-06 19:34:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 19:34:12,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179341720] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:12,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:12,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 18, 16] total 37 [2022-04-06 19:34:12,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1106768370] [2022-04-06 19:34:12,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1106768370] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:12,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:12,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:34:12,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688168893] [2022-04-06 19:34:12,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:12,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:34:12,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:12,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:34:12,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1153, Unknown=5, NotChecked=0, Total=1332 [2022-04-06 19:34:12,748 INFO L87 Difference]: Start difference. First operand 354 states and 418 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-04-06 19:34:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:13,088 INFO L93 Difference]: Finished difference Result 537 states and 620 transitions. [2022-04-06 19:34:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:34:13,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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 60 [2022-04-06 19:34:13,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:13,089 INFO L225 Difference]: With dead ends: 537 [2022-04-06 19:34:13,089 INFO L226 Difference]: Without dead ends: 348 [2022-04-06 19:34:13,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=202, Invalid=1433, Unknown=5, NotChecked=0, Total=1640 [2022-04-06 19:34:13,092 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:13,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 55 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-04-06 19:34:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 284. [2022-04-06 19:34:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.1720430107526882) internal successors, (327), 279 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 331 transitions. [2022-04-06 19:34:13,216 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 331 transitions. Word has length 60 [2022-04-06 19:34:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:13,216 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 331 transitions. [2022-04-06 19:34:13,216 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 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) [2022-04-06 19:34:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 331 transitions. [2022-04-06 19:34:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:34:13,217 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:13,217 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:13,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 19:34:13,429 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:13,431 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:13,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 5 times [2022-04-06 19:34:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:13,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1508005288] [2022-04-06 19:34:13,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:13,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:13,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 6 times [2022-04-06 19:34:13,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:13,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091307767] [2022-04-06 19:34:13,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:13,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:13,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 19:34:13,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:13,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091307767] [2022-04-06 19:34:13,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091307767] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:13,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806361388] [2022-04-06 19:34:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:13,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:13,669 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:13,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:34:13,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:34:13,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:34:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:13,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-04-06 19:34:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:13,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:14,062 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:14,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:14,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806361388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:14,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:14,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 23 [2022-04-06 19:34:14,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:14,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1508005288] [2022-04-06 19:34:14,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1508005288] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:14,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:14,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:14,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333703295] [2022-04-06 19:34:14,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:14,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:14,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:34:14,108 INFO L87 Difference]: Start difference. First operand 284 states and 331 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:14,546 INFO L93 Difference]: Finished difference Result 338 states and 389 transitions. [2022-04-06 19:34:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:14,546 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-04-06 19:34:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:14,547 INFO L225 Difference]: With dead ends: 338 [2022-04-06 19:34:14,547 INFO L226 Difference]: Without dead ends: 262 [2022-04-06 19:34:14,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:34:14,548 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 117 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:14,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 42 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-04-06 19:34:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-04-06 19:34:14,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.1750972762645915) internal successors, (302), 257 states have internal predecessors, (302), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2022-04-06 19:34:14,665 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 61 [2022-04-06 19:34:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:14,666 INFO L478 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2022-04-06 19:34:14,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2022-04-06 19:34:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 19:34:14,666 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:14,666 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:14,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:14,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:14,879 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:14,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:14,880 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 7 times [2022-04-06 19:34:14,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:14,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603157799] [2022-04-06 19:34:14,881 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:14,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 8 times [2022-04-06 19:34:14,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:14,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315061134] [2022-04-06 19:34:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:14,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:34:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315061134] [2022-04-06 19:34:15,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315061134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:15,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73838348] [2022-04-06 19:34:15,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:15,456 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:15,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:34:15,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:15,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:34:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:15,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 19:34:15,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:15,935 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:15,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:34:15,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73838348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:15,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:15,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 9] total 36 [2022-04-06 19:34:15,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:15,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603157799] [2022-04-06 19:34:15,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603157799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:15,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:15,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:34:15,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823377201] [2022-04-06 19:34:15,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:15,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:34:15,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:15,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:34:15,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:34:15,990 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:17,531 INFO L93 Difference]: Finished difference Result 1095 states and 1285 transitions. [2022-04-06 19:34:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:34:17,532 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 19:34:17,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:17,534 INFO L225 Difference]: With dead ends: 1095 [2022-04-06 19:34:17,534 INFO L226 Difference]: Without dead ends: 922 [2022-04-06 19:34:17,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=501, Invalid=2805, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:34:17,535 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 272 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:17,535 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 93 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-04-06 19:34:17,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 375. [2022-04-06 19:34:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 370 states have (on average 1.164864864864865) internal successors, (431), 370 states have internal predecessors, (431), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 435 transitions. [2022-04-06 19:34:17,719 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 435 transitions. Word has length 62 [2022-04-06 19:34:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:17,719 INFO L478 AbstractCegarLoop]: Abstraction has 375 states and 435 transitions. [2022-04-06 19:34:17,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 435 transitions. [2022-04-06 19:34:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 19:34:17,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:17,720 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:17,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:17,926 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:34:17,926 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:17,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 9 times [2022-04-06 19:34:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:17,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [630882204] [2022-04-06 19:34:17,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:17,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 10 times [2022-04-06 19:34:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:17,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825083571] [2022-04-06 19:34:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:17,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:34:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825083571] [2022-04-06 19:34:18,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825083571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037355676] [2022-04-06 19:34:18,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:18,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:18,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:18,102 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:18,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:34:18,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:18,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:34:18,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:18,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 19:34:18,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:18,487 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:18,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:34:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037355676] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:18,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:18,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 21 [2022-04-06 19:34:18,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:18,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [630882204] [2022-04-06 19:34:18,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [630882204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:18,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:18,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:18,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538291098] [2022-04-06 19:34:18,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:18,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:18,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:18,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:18,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:34:18,529 INFO L87 Difference]: Start difference. First operand 375 states and 435 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:19,004 INFO L93 Difference]: Finished difference Result 507 states and 586 transitions. [2022-04-06 19:34:19,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 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 62 [2022-04-06 19:34:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:19,005 INFO L225 Difference]: With dead ends: 507 [2022-04-06 19:34:19,005 INFO L226 Difference]: Without dead ends: 502 [2022-04-06 19:34:19,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:19,006 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 112 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:19,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 68 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-04-06 19:34:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 370. [2022-04-06 19:34:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.167123287671233) internal successors, (426), 365 states have internal predecessors, (426), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 430 transitions. [2022-04-06 19:34:19,197 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 430 transitions. Word has length 62 [2022-04-06 19:34:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:19,197 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 430 transitions. [2022-04-06 19:34:19,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 430 transitions. [2022-04-06 19:34:19,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:34:19,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:19,198 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:19,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:19,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:34:19,414 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:19,414 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 11 times [2022-04-06 19:34:19,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:19,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445182449] [2022-04-06 19:34:19,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:19,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:19,415 INFO L85 PathProgramCache]: Analyzing trace with hash 475673560, now seen corresponding path program 12 times [2022-04-06 19:34:19,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:19,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297465205] [2022-04-06 19:34:19,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:19,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:19,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297465205] [2022-04-06 19:34:19,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297465205] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:19,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028936734] [2022-04-06 19:34:19,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:19,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:19,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:19,495 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:19,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:34:19,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:34:19,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 19:34:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 19:34:19,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:19,846 INFO L356 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-04-06 19:34:19,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 8 [2022-04-06 19:34:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:34:20,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028936734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:20,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 14] total 29 [2022-04-06 19:34:20,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:20,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445182449] [2022-04-06 19:34:20,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445182449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:20,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:34:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825748522] [2022-04-06 19:34:20,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:20,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:34:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:34:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:20,059 INFO L87 Difference]: Start difference. First operand 370 states and 430 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:20,652 INFO L93 Difference]: Finished difference Result 739 states and 855 transitions. [2022-04-06 19:34:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:34:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 19:34:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:20,655 INFO L225 Difference]: With dead ends: 739 [2022-04-06 19:34:20,655 INFO L226 Difference]: Without dead ends: 690 [2022-04-06 19:34:20,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:34:20,656 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:20,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 67 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:20,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-04-06 19:34:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 370. [2022-04-06 19:34:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.158904109589041) internal successors, (423), 365 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 427 transitions. [2022-04-06 19:34:20,850 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 427 transitions. Word has length 63 [2022-04-06 19:34:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:20,850 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 427 transitions. [2022-04-06 19:34:20,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 427 transitions. [2022-04-06 19:34:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:34:20,851 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:20,851 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:20,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:21,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:34:21,068 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 13 times [2022-04-06 19:34:21,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [943402852] [2022-04-06 19:34:21,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:21,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -2031628323, now seen corresponding path program 14 times [2022-04-06 19:34:21,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:21,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951898705] [2022-04-06 19:34:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:21,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:21,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:21,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951898705] [2022-04-06 19:34:21,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951898705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:21,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590803083] [2022-04-06 19:34:21,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:21,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:21,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:21,157 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:21,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:34:21,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:21,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:21,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:21,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:21,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:34:21,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:21,619 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:21,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590803083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:21,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2022-04-06 19:34:21,666 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:21,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [943402852] [2022-04-06 19:34:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [943402852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:21,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:34:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945100263] [2022-04-06 19:34:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:21,668 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:34:21,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:34:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:34:21,668 INFO L87 Difference]: Start difference. First operand 370 states and 427 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:22,544 INFO L93 Difference]: Finished difference Result 1028 states and 1191 transitions. [2022-04-06 19:34:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:34:22,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 19:34:22,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:22,551 INFO L225 Difference]: With dead ends: 1028 [2022-04-06 19:34:22,551 INFO L226 Difference]: Without dead ends: 979 [2022-04-06 19:34:22,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:34:22,552 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 181 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:22,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 81 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-04-06 19:34:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 394. [2022-04-06 19:34:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.1568123393316196) internal successors, (450), 389 states have internal predecessors, (450), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 454 transitions. [2022-04-06 19:34:22,770 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 454 transitions. Word has length 65 [2022-04-06 19:34:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:22,771 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 454 transitions. [2022-04-06 19:34:22,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 454 transitions. [2022-04-06 19:34:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 19:34:22,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:22,772 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:22,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:22,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:34:22,997 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:22,997 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 15 times [2022-04-06 19:34:22,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:22,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161427641] [2022-04-06 19:34:22,998 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:22,998 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2072084830, now seen corresponding path program 16 times [2022-04-06 19:34:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:22,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258655817] [2022-04-06 19:34:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:22,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:23,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258655817] [2022-04-06 19:34:23,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258655817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:23,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941310709] [2022-04-06 19:34:23,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:23,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:23,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:23,115 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:23,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:34:23,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:23,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:23,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:23,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:34:23,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:23,694 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:23,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 19:34:23,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941310709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:23,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:23,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 30 [2022-04-06 19:34:23,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161427641] [2022-04-06 19:34:23,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161427641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:23,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:23,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:34:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535095978] [2022-04-06 19:34:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:23,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:34:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:23,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:34:23,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:34:23,761 INFO L87 Difference]: Start difference. First operand 394 states and 454 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:24,923 INFO L93 Difference]: Finished difference Result 1296 states and 1503 transitions. [2022-04-06 19:34:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:34:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 19:34:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:24,927 INFO L225 Difference]: With dead ends: 1296 [2022-04-06 19:34:24,927 INFO L226 Difference]: Without dead ends: 1247 [2022-04-06 19:34:24,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:24,928 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:24,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 110 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-04-06 19:34:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 396. [2022-04-06 19:34:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.1585677749360614) internal successors, (453), 391 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 457 transitions. [2022-04-06 19:34:25,163 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 457 transitions. Word has length 67 [2022-04-06 19:34:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:25,163 INFO L478 AbstractCegarLoop]: Abstraction has 396 states and 457 transitions. [2022-04-06 19:34:25,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 457 transitions. [2022-04-06 19:34:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:34:25,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:25,164 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:25,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 19:34:25,372 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:25,372 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 17 times [2022-04-06 19:34:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:25,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29296988] [2022-04-06 19:34:25,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:25,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1998884903, now seen corresponding path program 18 times [2022-04-06 19:34:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529122040] [2022-04-06 19:34:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:25,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:25,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:25,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529122040] [2022-04-06 19:34:25,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529122040] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:25,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882584598] [2022-04-06 19:34:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:25,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:25,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:25,508 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:25,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:34:25,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:34:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:26,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:26,037 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:34:26,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:26,200 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:26,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 19:34:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882584598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:26,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-04-06 19:34:26,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:26,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29296988] [2022-04-06 19:34:26,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29296988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:26,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:26,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:26,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538532413] [2022-04-06 19:34:26,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:26,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:26,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:26,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:26,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:26,281 INFO L87 Difference]: Start difference. First operand 396 states and 457 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:27,726 INFO L93 Difference]: Finished difference Result 1564 states and 1815 transitions. [2022-04-06 19:34:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:34:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:27,730 INFO L225 Difference]: With dead ends: 1564 [2022-04-06 19:34:27,730 INFO L226 Difference]: Without dead ends: 1515 [2022-04-06 19:34:27,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:34:27,731 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 228 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:27,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 134 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:27,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-04-06 19:34:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 398. [2022-04-06 19:34:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 393 states have (on average 1.1603053435114503) internal successors, (456), 393 states have internal predecessors, (456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 460 transitions. [2022-04-06 19:34:28,003 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 460 transitions. Word has length 69 [2022-04-06 19:34:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:28,003 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 460 transitions. [2022-04-06 19:34:28,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 460 transitions. [2022-04-06 19:34:28,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:34:28,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:28,004 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:28,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 19:34:28,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:28,213 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 19 times [2022-04-06 19:34:28,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [304608802] [2022-04-06 19:34:28,214 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:28,214 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1485591660, now seen corresponding path program 20 times [2022-04-06 19:34:28,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:28,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080487630] [2022-04-06 19:34:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:28,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:28,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:28,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080487630] [2022-04-06 19:34:28,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080487630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:28,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819015756] [2022-04-06 19:34:28,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:28,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:28,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:28,354 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:28,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:34:28,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:28,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:28,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 19:34:28,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:28,940 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:28,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:34:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819015756] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:29,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:29,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-04-06 19:34:29,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [304608802] [2022-04-06 19:34:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [304608802] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:29,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:29,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:34:29,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059455302] [2022-04-06 19:34:29,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:29,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:34:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:34:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:34:29,023 INFO L87 Difference]: Start difference. First operand 398 states and 460 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:30,844 INFO L93 Difference]: Finished difference Result 1832 states and 2127 transitions. [2022-04-06 19:34:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:30,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 19:34:30,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:30,848 INFO L225 Difference]: With dead ends: 1832 [2022-04-06 19:34:30,848 INFO L226 Difference]: Without dead ends: 1783 [2022-04-06 19:34:30,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=1572, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:34:30,849 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 269 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:30,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 146 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:30,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-04-06 19:34:31,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 400. [2022-04-06 19:34:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.1620253164556962) internal successors, (459), 395 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 463 transitions. [2022-04-06 19:34:31,126 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 463 transitions. Word has length 71 [2022-04-06 19:34:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:31,126 INFO L478 AbstractCegarLoop]: Abstraction has 400 states and 463 transitions. [2022-04-06 19:34:31,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 463 transitions. [2022-04-06 19:34:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:34:31,127 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:31,127 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:31,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 19:34:31,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:34:31,343 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:31,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 21 times [2022-04-06 19:34:31,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:31,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124563074] [2022-04-06 19:34:31,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:31,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 22 times [2022-04-06 19:34:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:31,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480144638] [2022-04-06 19:34:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:31,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:31,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 19:34:31,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:31,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480144638] [2022-04-06 19:34:31,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480144638] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:31,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487819741] [2022-04-06 19:34:31,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:31,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:31,873 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:31,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:34:31,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:31,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:31,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:34:31,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:32,309 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:34:32,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:34:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:34:32,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:32,514 INFO L356 Elim1Store]: treesize reduction 29, result has 68.1 percent of original size [2022-04-06 19:34:32,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 69 [2022-04-06 19:34:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:34:32,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487819741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:32,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:32,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 29 [2022-04-06 19:34:32,637 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:32,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124563074] [2022-04-06 19:34:32,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124563074] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:32,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:32,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:32,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610365008] [2022-04-06 19:34:32,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:32,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:32,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:32,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-04-06 19:34:32,639 INFO L87 Difference]: Start difference. First operand 400 states and 463 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:33,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:33,509 INFO L93 Difference]: Finished difference Result 770 states and 892 transitions. [2022-04-06 19:34:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:33,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 19:34:33,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:33,512 INFO L225 Difference]: With dead ends: 770 [2022-04-06 19:34:33,512 INFO L226 Difference]: Without dead ends: 716 [2022-04-06 19:34:33,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:34:33,513 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 201 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:33,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 67 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:33,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-04-06 19:34:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 569. [2022-04-06 19:34:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 564 states have (on average 1.1613475177304964) internal successors, (655), 564 states have internal predecessors, (655), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:33,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 659 transitions. [2022-04-06 19:34:33,891 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 659 transitions. Word has length 72 [2022-04-06 19:34:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:33,891 INFO L478 AbstractCegarLoop]: Abstraction has 569 states and 659 transitions. [2022-04-06 19:34:33,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 659 transitions. [2022-04-06 19:34:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:34:33,892 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:33,892 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:33,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:34,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:34,093 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 23 times [2022-04-06 19:34:34,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:34,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222933000] [2022-04-06 19:34:34,094 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:34,095 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 24 times [2022-04-06 19:34:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031384684] [2022-04-06 19:34:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:34,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 19:34:34,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031384684] [2022-04-06 19:34:34,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031384684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:34,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257121844] [2022-04-06 19:34:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:34,699 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:34,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:34:34,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 19:34:34,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:34:34,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:35,154 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:34:35,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-04-06 19:34:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:35,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:35,354 INFO L356 Elim1Store]: treesize reduction 35, result has 63.9 percent of original size [2022-04-06 19:34:35,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-04-06 19:34:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257121844] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:35,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:35,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 38 [2022-04-06 19:34:35,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:35,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222933000] [2022-04-06 19:34:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222933000] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:35,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:35,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:34:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400418109] [2022-04-06 19:34:35,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:35,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:34:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:34:35,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:34:35,525 INFO L87 Difference]: Start difference. First operand 569 states and 659 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:37,188 INFO L93 Difference]: Finished difference Result 1224 states and 1411 transitions. [2022-04-06 19:34:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:34:37,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 19:34:37,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:37,191 INFO L225 Difference]: With dead ends: 1224 [2022-04-06 19:34:37,192 INFO L226 Difference]: Without dead ends: 1161 [2022-04-06 19:34:37,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:34:37,193 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:37,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 91 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:34:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-04-06 19:34:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 726. [2022-04-06 19:34:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 721 states have (on average 1.159500693481276) internal successors, (836), 721 states have internal predecessors, (836), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 840 transitions. [2022-04-06 19:34:37,700 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 840 transitions. Word has length 72 [2022-04-06 19:34:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:37,700 INFO L478 AbstractCegarLoop]: Abstraction has 726 states and 840 transitions. [2022-04-06 19:34:37,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 840 transitions. [2022-04-06 19:34:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:34:37,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:37,701 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:37,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:37,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:37,912 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:37,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 25 times [2022-04-06 19:34:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:37,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815972618] [2022-04-06 19:34:37,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:37,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 26 times [2022-04-06 19:34:37,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125732873] [2022-04-06 19:34:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:37,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:38,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 19:34:38,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125732873] [2022-04-06 19:34:38,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125732873] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:38,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685870765] [2022-04-06 19:34:38,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:38,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:38,392 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:38,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:34:38,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:38,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 19:34:38,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:38,779 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:34:38,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-04-06 19:34:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 19:34:38,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:38,947 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-04-06 19:34:38,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-04-06 19:34:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:34:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685870765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:39,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 27 [2022-04-06 19:34:39,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:39,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815972618] [2022-04-06 19:34:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815972618] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:39,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613508979] [2022-04-06 19:34:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:39,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:39,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:34:39,086 INFO L87 Difference]: Start difference. First operand 726 states and 840 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:40,115 INFO L93 Difference]: Finished difference Result 952 states and 1094 transitions. [2022-04-06 19:34:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:34:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 19:34:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:40,118 INFO L225 Difference]: With dead ends: 952 [2022-04-06 19:34:40,118 INFO L226 Difference]: Without dead ends: 908 [2022-04-06 19:34:40,118 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=256, Invalid=1076, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:34:40,119 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:40,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 54 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:34:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-04-06 19:34:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 760. [2022-04-06 19:34:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 755 states have (on average 1.1523178807947019) internal successors, (870), 755 states have internal predecessors, (870), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 874 transitions. [2022-04-06 19:34:40,645 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 874 transitions. Word has length 72 [2022-04-06 19:34:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:40,646 INFO L478 AbstractCegarLoop]: Abstraction has 760 states and 874 transitions. [2022-04-06 19:34:40,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 874 transitions. [2022-04-06 19:34:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 19:34:40,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:40,647 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:40,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:40,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:34:40,854 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:40,854 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 27 times [2022-04-06 19:34:40,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:40,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1204688076] [2022-04-06 19:34:40,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:40,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 28 times [2022-04-06 19:34:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:40,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139618676] [2022-04-06 19:34:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:41,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-04-06 19:34:41,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139618676] [2022-04-06 19:34:41,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139618676] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:41,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502214394] [2022-04-06 19:34:41,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:41,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:41,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:41,539 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:34:41,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:41,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 19:34:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:42,075 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-04-06 19:34:42,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-04-06 19:34:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 19:34:42,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:42,322 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-04-06 19:34:42,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 77 [2022-04-06 19:34:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:34:42,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502214394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:42,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:42,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 40 [2022-04-06 19:34:42,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:42,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1204688076] [2022-04-06 19:34:42,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1204688076] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:42,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:42,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:34:42,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132595614] [2022-04-06 19:34:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:42,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:34:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:34:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:34:42,490 INFO L87 Difference]: Start difference. First operand 760 states and 874 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:44,392 INFO L93 Difference]: Finished difference Result 1436 states and 1645 transitions. [2022-04-06 19:34:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:34:44,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-04-06 19:34:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:44,396 INFO L225 Difference]: With dead ends: 1436 [2022-04-06 19:34:44,397 INFO L226 Difference]: Without dead ends: 1236 [2022-04-06 19:34:44,398 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=462, Invalid=2730, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:34:44,399 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 254 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:44,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 81 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-04-06 19:34:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 948. [2022-04-06 19:34:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 943 states have (on average 1.1431601272534464) internal successors, (1078), 943 states have internal predecessors, (1078), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1082 transitions. [2022-04-06 19:34:45,128 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1082 transitions. Word has length 72 [2022-04-06 19:34:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:45,129 INFO L478 AbstractCegarLoop]: Abstraction has 948 states and 1082 transitions. [2022-04-06 19:34:45,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1082 transitions. [2022-04-06 19:34:45,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:34:45,144 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:45,144 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:45,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:45,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:34:45,359 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 29 times [2022-04-06 19:34:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:45,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [750781070] [2022-04-06 19:34:45,360 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:45,360 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 30 times [2022-04-06 19:34:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479687936] [2022-04-06 19:34:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:45,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:45,501 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:45,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479687936] [2022-04-06 19:34:45,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479687936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:45,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097382167] [2022-04-06 19:34:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:34:45,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:45,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:45,512 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:45,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:34:45,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:34:45,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:45,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:34:45,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:46,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:34:46,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:34:46,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 19:34:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-04-06 19:34:46,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:46,443 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 19:34:46,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 19:34:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-04-06 19:34:46,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097382167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:46,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:46,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 31 [2022-04-06 19:34:46,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:46,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [750781070] [2022-04-06 19:34:46,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [750781070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:46,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:46,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:34:46,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884724952] [2022-04-06 19:34:46,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:46,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:34:46,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:34:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:46,461 INFO L87 Difference]: Start difference. First operand 948 states and 1082 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:49,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:49,755 INFO L93 Difference]: Finished difference Result 3393 states and 3886 transitions. [2022-04-06 19:34:49,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:34:49,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 19:34:49,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:49,763 INFO L225 Difference]: With dead ends: 3393 [2022-04-06 19:34:49,763 INFO L226 Difference]: Without dead ends: 3344 [2022-04-06 19:34:49,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:34:49,764 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 309 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:49,768 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 170 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:34:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2022-04-06 19:34:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 950. [2022-04-06 19:34:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 945 states have (on average 1.143915343915344) internal successors, (1081), 945 states have internal predecessors, (1081), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1085 transitions. [2022-04-06 19:34:50,516 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1085 transitions. Word has length 73 [2022-04-06 19:34:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:50,516 INFO L478 AbstractCegarLoop]: Abstraction has 950 states and 1085 transitions. [2022-04-06 19:34:50,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1085 transitions. [2022-04-06 19:34:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 19:34:50,528 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:50,528 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:50,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:50,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:34:50,743 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 31 times [2022-04-06 19:34:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:50,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [737150466] [2022-04-06 19:34:50,745 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:50,745 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 32 times [2022-04-06 19:34:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:50,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025750832] [2022-04-06 19:34:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:50,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:50,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 19:34:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025750832] [2022-04-06 19:34:50,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025750832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:50,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584197551] [2022-04-06 19:34:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:34:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:50,881 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:50,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:34:50,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:34:50,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:50,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:51,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-04-06 19:34:51,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:51,408 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:51,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 19:34:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584197551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:51,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2022-04-06 19:34:51,469 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:51,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [737150466] [2022-04-06 19:34:51,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [737150466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:51,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:34:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122275609] [2022-04-06 19:34:51,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:51,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:34:51,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:34:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:34:51,470 INFO L87 Difference]: Start difference. First operand 950 states and 1085 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2022-04-06 19:34:53,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:53,467 INFO L93 Difference]: Finished difference Result 1934 states and 2199 transitions. [2022-04-06 19:34:53,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:34:53,468 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 74 [2022-04-06 19:34:53,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:53,472 INFO L225 Difference]: With dead ends: 1934 [2022-04-06 19:34:53,472 INFO L226 Difference]: Without dead ends: 1809 [2022-04-06 19:34:53,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:34:53,474 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:53,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 81 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:34:53,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-04-06 19:34:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1032. [2022-04-06 19:34:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1027 states have (on average 1.1402142161635833) internal successors, (1171), 1027 states have internal predecessors, (1171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1175 transitions. [2022-04-06 19:34:54,289 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1175 transitions. Word has length 74 [2022-04-06 19:34:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:34:54,290 INFO L478 AbstractCegarLoop]: Abstraction has 1032 states and 1175 transitions. [2022-04-06 19:34:54,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2022-04-06 19:34:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1175 transitions. [2022-04-06 19:34:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:34:54,295 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:34:54,295 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:34:54,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 19:34:54,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:54,520 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:34:54,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:34:54,520 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 33 times [2022-04-06 19:34:54,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:54,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030909919] [2022-04-06 19:34:54,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:34:54,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:34:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 34 times [2022-04-06 19:34:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:34:54,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187453147] [2022-04-06 19:34:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:34:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:34:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:54,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:34:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:34:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:34:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:34:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187453147] [2022-04-06 19:34:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187453147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:34:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638669028] [2022-04-06 19:34:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:34:54,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:34:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:34:54,695 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:34:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:34:54,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:34:54,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:34:54,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:34:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:34:55,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:34:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 19:34:55,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:34:55,280 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:34:55,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:34:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 19:34:55,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638669028] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:34:55,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:34:55,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2022-04-06 19:34:55,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:34:55,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030909919] [2022-04-06 19:34:55,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030909919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:34:55,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:34:55,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:34:55,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989398873] [2022-04-06 19:34:55,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:34:55,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:34:55,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:34:55,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:34:55,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:34:55,340 INFO L87 Difference]: Start difference. First operand 1032 states and 1175 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:34:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:34:59,416 INFO L93 Difference]: Finished difference Result 3883 states and 4447 transitions. [2022-04-06 19:34:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:34:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:34:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:34:59,425 INFO L225 Difference]: With dead ends: 3883 [2022-04-06 19:34:59,425 INFO L226 Difference]: Without dead ends: 3834 [2022-04-06 19:34:59,425 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1908, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:34:59,426 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:34:59,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 194 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:34:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2022-04-06 19:35:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 1034. [2022-04-06 19:35:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1029 states have (on average 1.1409135082604471) internal successors, (1174), 1029 states have internal predecessors, (1174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1178 transitions. [2022-04-06 19:35:00,298 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1178 transitions. Word has length 75 [2022-04-06 19:35:00,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:00,298 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1178 transitions. [2022-04-06 19:35:00,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1178 transitions. [2022-04-06 19:35:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 19:35:00,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:00,300 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:00,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 19:35:00,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:35:00,515 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:00,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:00,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 35 times [2022-04-06 19:35:00,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:00,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335903099] [2022-04-06 19:35:00,516 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:00,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 36 times [2022-04-06 19:35:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:00,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446349369] [2022-04-06 19:35:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:00,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 19:35:00,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446349369] [2022-04-06 19:35:00,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446349369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588158746] [2022-04-06 19:35:00,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:00,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:00,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:00,652 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:00,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:35:00,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 19:35:00,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:00,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:35:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:00,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:35:01,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 19:35:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 19:35:01,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588158746] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:01,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:01,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-04-06 19:35:01,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335903099] [2022-04-06 19:35:01,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335903099] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:01,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:01,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:35:01,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859131553] [2022-04-06 19:35:01,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:01,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:35:01,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:01,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:35:01,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:35:01,457 INFO L87 Difference]: Start difference. First operand 1034 states and 1178 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-04-06 19:35:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:03,979 INFO L93 Difference]: Finished difference Result 2385 states and 2721 transitions. [2022-04-06 19:35:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:35:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 76 [2022-04-06 19:35:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:03,995 INFO L225 Difference]: With dead ends: 2385 [2022-04-06 19:35:03,996 INFO L226 Difference]: Without dead ends: 2260 [2022-04-06 19:35:03,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:35:03,997 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 260 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:03,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 104 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:35:03,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-04-06 19:35:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1034. [2022-04-06 19:35:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1029 states have (on average 1.1409135082604471) internal successors, (1174), 1029 states have internal predecessors, (1174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1178 transitions. [2022-04-06 19:35:04,882 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1178 transitions. Word has length 76 [2022-04-06 19:35:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:04,882 INFO L478 AbstractCegarLoop]: Abstraction has 1034 states and 1178 transitions. [2022-04-06 19:35:04,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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) [2022-04-06 19:35:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1178 transitions. [2022-04-06 19:35:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:35:04,883 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:04,884 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:04,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:05,098 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:35:05,098 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 37 times [2022-04-06 19:35:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:05,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293774183] [2022-04-06 19:35:05,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:05,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:05,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 38 times [2022-04-06 19:35:05,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:05,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975774284] [2022-04-06 19:35:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:35:05,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975774284] [2022-04-06 19:35:05,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975774284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:05,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209276039] [2022-04-06 19:35:05,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:05,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:05,268 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:05,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:35:05,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:05,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:35:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:05,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 19:35:05,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:05,960 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:05,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:35:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-04-06 19:35:06,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209276039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:06,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:06,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-04-06 19:35:06,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:06,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293774183] [2022-04-06 19:35:06,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293774183] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:06,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:06,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:35:06,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288289101] [2022-04-06 19:35:06,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:06,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:35:06,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:06,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:35:06,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:06,048 INFO L87 Difference]: Start difference. First operand 1034 states and 1178 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:11,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:11,227 INFO L93 Difference]: Finished difference Result 4373 states and 5008 transitions. [2022-04-06 19:35:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:35:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 19:35:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:11,234 INFO L225 Difference]: With dead ends: 4373 [2022-04-06 19:35:11,234 INFO L226 Difference]: Without dead ends: 4324 [2022-04-06 19:35:11,235 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=2088, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:35:11,235 INFO L913 BasicCegarLoop]: 156 mSDtfsCounter, 376 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:11,236 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 213 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2061 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:35:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-04-06 19:35:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 1036. [2022-04-06 19:35:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1031 states have (on average 1.1416100872938895) internal successors, (1177), 1031 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-04-06 19:35:12,173 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 77 [2022-04-06 19:35:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:12,173 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-04-06 19:35:12,174 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:12,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-04-06 19:35:12,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 19:35:12,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:12,176 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:12,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:12,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:12,393 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 39 times [2022-04-06 19:35:12,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:12,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025315573] [2022-04-06 19:35:12,394 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:12,394 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:12,394 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 40 times [2022-04-06 19:35:12,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:12,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342978436] [2022-04-06 19:35:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:12,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:12,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 19:35:12,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342978436] [2022-04-06 19:35:12,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342978436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:12,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211232544] [2022-04-06 19:35:12,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:12,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:12,524 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:12,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:35:12,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:12,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:12,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:35:12,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:13,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:35:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:13,223 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:13,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:35:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 19:35:13,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211232544] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:13,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:13,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2022-04-06 19:35:13,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:13,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025315573] [2022-04-06 19:35:13,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025315573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:13,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:13,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:35:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147237133] [2022-04-06 19:35:13,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:13,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:35:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:35:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:35:13,301 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:16,681 INFO L93 Difference]: Finished difference Result 2875 states and 3282 transitions. [2022-04-06 19:35:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:35:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 78 [2022-04-06 19:35:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:16,685 INFO L225 Difference]: With dead ends: 2875 [2022-04-06 19:35:16,685 INFO L226 Difference]: Without dead ends: 2750 [2022-04-06 19:35:16,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=1721, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:35:16,686 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 318 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:16,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 123 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:35:16,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2022-04-06 19:35:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1036. [2022-04-06 19:35:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1031 states have (on average 1.1416100872938895) internal successors, (1177), 1031 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1181 transitions. [2022-04-06 19:35:17,663 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1181 transitions. Word has length 78 [2022-04-06 19:35:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:17,663 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1181 transitions. [2022-04-06 19:35:17,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1181 transitions. [2022-04-06 19:35:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:35:17,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:17,664 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:17,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:17,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:35:17,876 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 41 times [2022-04-06 19:35:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:17,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1630345071] [2022-04-06 19:35:17,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:17,877 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:17,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 42 times [2022-04-06 19:35:17,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:17,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782830827] [2022-04-06 19:35:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:17,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:18,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:18,077 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:35:18,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782830827] [2022-04-06 19:35:18,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782830827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:18,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306467014] [2022-04-06 19:35:18,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:18,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:18,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:18,081 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:18,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:35:18,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:35:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:18,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:35:18,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 19:35:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:19,064 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 19:35:19,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 19:35:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-04-06 19:35:19,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306467014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:19,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:19,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 35 [2022-04-06 19:35:19,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:19,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1630345071] [2022-04-06 19:35:19,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1630345071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:19,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:19,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:35:19,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078517110] [2022-04-06 19:35:19,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:19,083 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:35:19,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:19,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:35:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:19,084 INFO L87 Difference]: Start difference. First operand 1036 states and 1181 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:25,035 INFO L93 Difference]: Finished difference Result 4863 states and 5569 transitions. [2022-04-06 19:35:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:35:25,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:35:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:25,042 INFO L225 Difference]: With dead ends: 4863 [2022-04-06 19:35:25,042 INFO L226 Difference]: Without dead ends: 4814 [2022-04-06 19:35:25,043 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=2087, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:35:25,044 INFO L913 BasicCegarLoop]: 175 mSDtfsCounter, 407 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:25,044 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:35:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2022-04-06 19:35:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 1038. [2022-04-06 19:35:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1033 states have (on average 1.1423039690222652) internal successors, (1180), 1033 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1184 transitions. [2022-04-06 19:35:26,030 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1184 transitions. Word has length 79 [2022-04-06 19:35:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:26,031 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1184 transitions. [2022-04-06 19:35:26,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1184 transitions. [2022-04-06 19:35:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 19:35:26,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:26,033 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:26,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:26,238 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:26,238 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:26,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 43 times [2022-04-06 19:35:26,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:26,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [445108468] [2022-04-06 19:35:26,239 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:26,239 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 44 times [2022-04-06 19:35:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:26,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700177759] [2022-04-06 19:35:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:26,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:26,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 19:35:26,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:26,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700177759] [2022-04-06 19:35:26,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700177759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305009628] [2022-04-06 19:35:26,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:26,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:26,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:26,383 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:26,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:35:26,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:26,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:26,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:35:26,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:26,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-04-06 19:35:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:27,060 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:27,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:35:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 19:35:27,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305009628] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:27,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:27,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 34 [2022-04-06 19:35:27,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:27,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [445108468] [2022-04-06 19:35:27,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [445108468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:27,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:27,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:35:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810204705] [2022-04-06 19:35:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:27,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:35:27,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:35:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:35:27,142 INFO L87 Difference]: Start difference. First operand 1038 states and 1184 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2022-04-06 19:35:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:31,503 INFO L93 Difference]: Finished difference Result 3398 states and 3880 transitions. [2022-04-06 19:35:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:35:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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 80 [2022-04-06 19:35:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:31,508 INFO L225 Difference]: With dead ends: 3398 [2022-04-06 19:35:31,508 INFO L226 Difference]: Without dead ends: 3273 [2022-04-06 19:35:31,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=1976, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:35:31,509 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 358 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:31,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 151 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:35:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-04-06 19:35:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 1038. [2022-04-06 19:35:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1033 states have (on average 1.1423039690222652) internal successors, (1180), 1033 states have internal predecessors, (1180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:32,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1184 transitions. [2022-04-06 19:35:32,494 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1184 transitions. Word has length 80 [2022-04-06 19:35:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:32,494 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1184 transitions. [2022-04-06 19:35:32,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 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) [2022-04-06 19:35:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1184 transitions. [2022-04-06 19:35:32,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:35:32,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:32,496 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:32,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:32,715 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:32,715 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 45 times [2022-04-06 19:35:32,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:32,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66824343] [2022-04-06 19:35:32,716 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:32,716 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:32,716 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 46 times [2022-04-06 19:35:32,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:32,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387715687] [2022-04-06 19:35:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:32,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:35:32,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:32,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387715687] [2022-04-06 19:35:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387715687] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:32,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029764372] [2022-04-06 19:35:32,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:32,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:32,837 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:32,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:35:32,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:32,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 19:35:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:33,766 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:33,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:35:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:35:33,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:36,561 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-04-06 19:35:36,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-04-06 19:35:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 19:35:36,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029764372] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:36,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:36,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 18] total 44 [2022-04-06 19:35:36,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:36,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66824343] [2022-04-06 19:35:36,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66824343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:36,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:36,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:35:36,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898641669] [2022-04-06 19:35:36,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:36,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:35:36,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:36,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:35:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1686, Unknown=4, NotChecked=0, Total=1892 [2022-04-06 19:35:36,617 INFO L87 Difference]: Start difference. First operand 1038 states and 1184 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:37,795 INFO L93 Difference]: Finished difference Result 1303 states and 1472 transitions. [2022-04-06 19:35:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:35:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:35:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:37,796 INFO L225 Difference]: With dead ends: 1303 [2022-04-06 19:35:37,796 INFO L226 Difference]: Without dead ends: 823 [2022-04-06 19:35:37,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=237, Invalid=2209, Unknown=4, NotChecked=0, Total=2450 [2022-04-06 19:35:37,798 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:37,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 81 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:35:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-04-06 19:35:38,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 738. [2022-04-06 19:35:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 733 states have (on average 1.13506139154161) internal successors, (832), 733 states have internal predecessors, (832), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 836 transitions. [2022-04-06 19:35:38,551 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 836 transitions. Word has length 81 [2022-04-06 19:35:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:38,551 INFO L478 AbstractCegarLoop]: Abstraction has 738 states and 836 transitions. [2022-04-06 19:35:38,551 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:38,551 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 836 transitions. [2022-04-06 19:35:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:35:38,552 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:38,552 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:38,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:38,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 19:35:38,768 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 47 times [2022-04-06 19:35:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [860777118] [2022-04-06 19:35:38,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:38,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 48 times [2022-04-06 19:35:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714441873] [2022-04-06 19:35:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:38,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:35:38,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:38,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714441873] [2022-04-06 19:35:38,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714441873] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:38,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173183275] [2022-04-06 19:35:38,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:35:38,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:38,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:38,968 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:38,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:35:39,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:35:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 19:35:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:39,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:35:39,651 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:35:39,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 19:35:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-04-06 19:35:39,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:40,040 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 19:35:40,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 19:35:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-04-06 19:35:40,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173183275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:40,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 13] total 37 [2022-04-06 19:35:40,077 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:40,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [860777118] [2022-04-06 19:35:40,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [860777118] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:40,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:40,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:35:40,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422287194] [2022-04-06 19:35:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:40,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:35:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:40,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:35:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:35:40,078 INFO L87 Difference]: Start difference. First operand 738 states and 836 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:47,178 INFO L93 Difference]: Finished difference Result 4987 states and 5710 transitions. [2022-04-06 19:35:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:35:47,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:35:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:47,211 INFO L225 Difference]: With dead ends: 4987 [2022-04-06 19:35:47,211 INFO L226 Difference]: Without dead ends: 4938 [2022-04-06 19:35:47,212 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=2386, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:35:47,213 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 448 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:47,213 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 261 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:35:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2022-04-06 19:35:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 740. [2022-04-06 19:35:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 735 states have (on average 1.1360544217687074) internal successors, (835), 735 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 839 transitions. [2022-04-06 19:35:48,039 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 839 transitions. Word has length 81 [2022-04-06 19:35:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:48,039 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 839 transitions. [2022-04-06 19:35:48,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 839 transitions. [2022-04-06 19:35:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 19:35:48,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:48,040 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:48,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:48,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 19:35:48,243 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 49 times [2022-04-06 19:35:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:48,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515335863] [2022-04-06 19:35:48,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:48,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 50 times [2022-04-06 19:35:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:48,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624789085] [2022-04-06 19:35:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:48,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:48,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 19:35:48,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:48,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624789085] [2022-04-06 19:35:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624789085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758360325] [2022-04-06 19:35:48,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:35:48,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:48,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:48,556 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:48,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:35:48,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:35:48,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:35:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:49,582 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:35:49,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 17 [2022-04-06 19:35:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 35 proven. 77 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 19:35:49,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:50,619 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-04-06 19:35:50,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 37 [2022-04-06 19:35:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 19:35:50,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758360325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:50,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:50,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 18] total 52 [2022-04-06 19:35:50,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:50,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515335863] [2022-04-06 19:35:50,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515335863] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:50,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:50,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:35:50,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296540217] [2022-04-06 19:35:50,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:50,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:35:50,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:50,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:35:50,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=2335, Unknown=1, NotChecked=0, Total=2652 [2022-04-06 19:35:50,714 INFO L87 Difference]: Start difference. First operand 740 states and 839 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:52,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:52,036 INFO L93 Difference]: Finished difference Result 815 states and 918 transitions. [2022-04-06 19:35:52,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:35:52,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-04-06 19:35:52,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:52,038 INFO L225 Difference]: With dead ends: 815 [2022-04-06 19:35:52,038 INFO L226 Difference]: Without dead ends: 610 [2022-04-06 19:35:52,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=427, Invalid=3354, Unknown=1, NotChecked=0, Total=3782 [2022-04-06 19:35:52,039 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:52,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 71 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:35:52,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-04-06 19:35:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-04-06 19:35:52,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.1504132231404958) internal successors, (696), 605 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 700 transitions. [2022-04-06 19:35:52,726 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 700 transitions. Word has length 82 [2022-04-06 19:35:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:52,726 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 700 transitions. [2022-04-06 19:35:52,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 700 transitions. [2022-04-06 19:35:52,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 19:35:52,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:52,727 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:52,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:52,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:35:52,939 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 51 times [2022-04-06 19:35:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:52,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203128014] [2022-04-06 19:35:52,940 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:52,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 52 times [2022-04-06 19:35:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:52,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343911674] [2022-04-06 19:35:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:52,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:35:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:35:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 19:35:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:35:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343911674] [2022-04-06 19:35:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343911674] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:35:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627623161] [2022-04-06 19:35:53,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:35:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:35:53,123 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:35:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:35:53,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:35:53,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:35:53,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:35:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:35:53,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:35:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 19:35:53,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:35:53,693 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:35:53,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:35:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-04-06 19:35:53,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627623161] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:35:53,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:35:53,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 35 [2022-04-06 19:35:53,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:35:53,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203128014] [2022-04-06 19:35:53,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203128014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:35:53,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:35:53,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:35:53,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38578956] [2022-04-06 19:35:53,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:35:53,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:35:53,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:35:53,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:35:53,747 INFO L87 Difference]: Start difference. First operand 610 states and 700 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-04-06 19:35:58,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:35:58,444 INFO L93 Difference]: Finished difference Result 3326 states and 3811 transitions. [2022-04-06 19:35:58,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:35:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-04-06 19:35:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:35:58,449 INFO L225 Difference]: With dead ends: 3326 [2022-04-06 19:35:58,449 INFO L226 Difference]: Without dead ends: 3201 [2022-04-06 19:35:58,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:35:58,450 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 373 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:35:58,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 151 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:35:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2022-04-06 19:35:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 610. [2022-04-06 19:35:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 605 states have (on average 1.1504132231404958) internal successors, (696), 605 states have internal predecessors, (696), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:35:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 700 transitions. [2022-04-06 19:35:59,190 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 700 transitions. Word has length 82 [2022-04-06 19:35:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:35:59,190 INFO L478 AbstractCegarLoop]: Abstraction has 610 states and 700 transitions. [2022-04-06 19:35:59,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-04-06 19:35:59,190 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 700 transitions. [2022-04-06 19:35:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:35:59,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:35:59,191 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:35:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:35:59,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:35:59,408 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:35:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:35:59,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 53 times [2022-04-06 19:35:59,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:35:59,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828017731] [2022-04-06 19:35:59,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:35:59,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:35:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 54 times [2022-04-06 19:35:59,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:35:59,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899393078] [2022-04-06 19:35:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:35:59,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:35:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:00,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:00,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 19:36:00,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899393078] [2022-04-06 19:36:00,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899393078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676130465] [2022-04-06 19:36:00,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:00,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:00,225 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:00,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:36:00,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:36:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:36:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:00,677 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:00,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2022-04-06 19:36:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:00,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:00,841 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:36:00,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:36:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:00,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676130465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:00,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:00,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12, 11] total 43 [2022-04-06 19:36:00,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:00,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828017731] [2022-04-06 19:36:00,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828017731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:00,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:00,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:36:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339791921] [2022-04-06 19:36:00,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:00,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:36:00,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:36:00,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1601, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:36:00,921 INFO L87 Difference]: Start difference. First operand 610 states and 700 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:04,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:04,817 INFO L93 Difference]: Finished difference Result 2033 states and 2337 transitions. [2022-04-06 19:36:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:36:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 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 83 [2022-04-06 19:36:04,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:04,821 INFO L225 Difference]: With dead ends: 2033 [2022-04-06 19:36:04,821 INFO L226 Difference]: Without dead ends: 1745 [2022-04-06 19:36:04,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=590, Invalid=4102, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:36:04,822 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 279 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:04,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 125 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:36:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-04-06 19:36:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 865. [2022-04-06 19:36:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 860 states have (on average 1.1406976744186046) internal successors, (981), 860 states have internal predecessors, (981), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:05,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 985 transitions. [2022-04-06 19:36:05,948 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 985 transitions. Word has length 83 [2022-04-06 19:36:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:05,948 INFO L478 AbstractCegarLoop]: Abstraction has 865 states and 985 transitions. [2022-04-06 19:36:05,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:05,948 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 985 transitions. [2022-04-06 19:36:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:05,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:05,949 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:05,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:06,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:36:06,161 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 55 times [2022-04-06 19:36:06,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:06,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722854777] [2022-04-06 19:36:06,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:06,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2049500001, now seen corresponding path program 56 times [2022-04-06 19:36:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571840404] [2022-04-06 19:36:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:07,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:36:07,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:07,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571840404] [2022-04-06 19:36:07,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571840404] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:07,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919276895] [2022-04-06 19:36:07,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:07,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:07,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:07,093 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:36:07,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:36:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:07,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:36:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 19:36:07,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:07,747 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:36:07,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:36:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:07,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919276895] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:07,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:07,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14, 11] total 44 [2022-04-06 19:36:07,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722854777] [2022-04-06 19:36:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722854777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:07,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:07,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:36:07,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160406534] [2022-04-06 19:36:07,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:07,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:36:07,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:36:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:36:07,843 INFO L87 Difference]: Start difference. First operand 865 states and 985 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:11,894 INFO L93 Difference]: Finished difference Result 2136 states and 2454 transitions. [2022-04-06 19:36:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:36:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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 83 [2022-04-06 19:36:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:11,913 INFO L225 Difference]: With dead ends: 2136 [2022-04-06 19:36:11,913 INFO L226 Difference]: Without dead ends: 1827 [2022-04-06 19:36:11,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=514, Invalid=3518, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:36:11,914 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 279 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:11,915 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 115 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:36:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2022-04-06 19:36:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1051. [2022-04-06 19:36:13,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1046 states have (on average 1.135755258126195) internal successors, (1188), 1046 states have internal predecessors, (1188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1192 transitions. [2022-04-06 19:36:13,385 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1192 transitions. Word has length 83 [2022-04-06 19:36:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:13,385 INFO L478 AbstractCegarLoop]: Abstraction has 1051 states and 1192 transitions. [2022-04-06 19:36:13,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1192 transitions. [2022-04-06 19:36:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:13,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:13,386 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:13,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 19:36:13,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 19:36:13,587 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:13,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 57 times [2022-04-06 19:36:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:13,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [48527981] [2022-04-06 19:36:13,588 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:13,588 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:13,588 INFO L85 PathProgramCache]: Analyzing trace with hash -735580963, now seen corresponding path program 58 times [2022-04-06 19:36:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:13,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243484246] [2022-04-06 19:36:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:14,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 13 proven. 80 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:36:14,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:14,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243484246] [2022-04-06 19:36:14,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243484246] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:14,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705643240] [2022-04-06 19:36:14,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:14,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:14,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:14,106 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:14,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:36:14,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:14,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:14,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:36:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:14,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:36:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 19:36:14,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:14,693 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:36:14,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:36:14,743 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:14,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705643240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:14,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:14,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 11] total 36 [2022-04-06 19:36:14,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:14,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [48527981] [2022-04-06 19:36:14,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [48527981] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:14,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:14,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:36:14,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571349281] [2022-04-06 19:36:14,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:14,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:36:14,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:14,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:36:14,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:36:14,744 INFO L87 Difference]: Start difference. First operand 1051 states and 1192 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:36:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:17,268 INFO L93 Difference]: Finished difference Result 1523 states and 1724 transitions. [2022-04-06 19:36:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:36:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-04-06 19:36:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:17,270 INFO L225 Difference]: With dead ends: 1523 [2022-04-06 19:36:17,270 INFO L226 Difference]: Without dead ends: 1459 [2022-04-06 19:36:17,271 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:36:17,273 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 149 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:17,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 82 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:36:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-04-06 19:36:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1322. [2022-04-06 19:36:19,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1317 states have (on average 1.132118451025057) internal successors, (1491), 1317 states have internal predecessors, (1491), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:19,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1495 transitions. [2022-04-06 19:36:19,089 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1495 transitions. Word has length 83 [2022-04-06 19:36:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:19,089 INFO L478 AbstractCegarLoop]: Abstraction has 1322 states and 1495 transitions. [2022-04-06 19:36:19,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:36:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1495 transitions. [2022-04-06 19:36:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:19,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:19,091 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:19,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-04-06 19:36:19,309 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:19,310 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 59 times [2022-04-06 19:36:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:19,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702917159] [2022-04-06 19:36:19,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:19,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash 81092769, now seen corresponding path program 60 times [2022-04-06 19:36:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:19,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244684837] [2022-04-06 19:36:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:19,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 13 proven. 80 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:36:19,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:19,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244684837] [2022-04-06 19:36:19,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244684837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690125915] [2022-04-06 19:36:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:19,810 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:19,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:36:20,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:36:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:36:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:20,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:36:20,408 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:20,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:20,588 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:36:20,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:36:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:20,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690125915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:20,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:20,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 34 [2022-04-06 19:36:20,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:20,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702917159] [2022-04-06 19:36:20,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702917159] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:20,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:20,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:36:20,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117950335] [2022-04-06 19:36:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:20,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:36:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:36:20,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:36:20,662 INFO L87 Difference]: Start difference. First operand 1322 states and 1495 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:36:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:23,245 INFO L93 Difference]: Finished difference Result 1516 states and 1710 transitions. [2022-04-06 19:36:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:36:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 83 [2022-04-06 19:36:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:23,261 INFO L225 Difference]: With dead ends: 1516 [2022-04-06 19:36:23,261 INFO L226 Difference]: Without dead ends: 1465 [2022-04-06 19:36:23,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:36:23,276 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 212 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:23,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 60 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:36:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2022-04-06 19:36:25,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 1315. [2022-04-06 19:36:25,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1310 states have (on average 1.130534351145038) internal successors, (1481), 1310 states have internal predecessors, (1481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1485 transitions. [2022-04-06 19:36:25,068 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1485 transitions. Word has length 83 [2022-04-06 19:36:25,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:25,068 INFO L478 AbstractCegarLoop]: Abstraction has 1315 states and 1485 transitions. [2022-04-06 19:36:25,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:36:25,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1485 transitions. [2022-04-06 19:36:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:25,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:25,070 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:25,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 19:36:25,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 19:36:25,276 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 61 times [2022-04-06 19:36:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:25,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [747514364] [2022-04-06 19:36:25,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:25,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:25,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1189511131, now seen corresponding path program 62 times [2022-04-06 19:36:25,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:25,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019900327] [2022-04-06 19:36:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:25,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-06 19:36:26,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019900327] [2022-04-06 19:36:26,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019900327] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:26,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382042390] [2022-04-06 19:36:26,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:36:26,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:26,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:26,238 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:26,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:36:26,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:36:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:36:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:26,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:36:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:26,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:26,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 20 [2022-04-06 19:36:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 19:36:26,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:27,374 INFO L356 Elim1Store]: treesize reduction 58, result has 60.5 percent of original size [2022-04-06 19:36:27,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 104 [2022-04-06 19:36:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 19:36:27,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382042390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:27,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:27,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 16] total 48 [2022-04-06 19:36:27,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [747514364] [2022-04-06 19:36:27,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [747514364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:27,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:27,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:36:27,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437924902] [2022-04-06 19:36:27,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:27,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:36:27,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:27,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:36:27,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:36:27,577 INFO L87 Difference]: Start difference. First operand 1315 states and 1485 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-04-06 19:36:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:32,722 INFO L93 Difference]: Finished difference Result 2426 states and 2726 transitions. [2022-04-06 19:36:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:36:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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 83 [2022-04-06 19:36:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:32,725 INFO L225 Difference]: With dead ends: 2426 [2022-04-06 19:36:32,725 INFO L226 Difference]: Without dead ends: 2421 [2022-04-06 19:36:32,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=4597, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:36:32,726 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 344 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:32,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 85 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:36:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-04-06 19:36:34,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1315. [2022-04-06 19:36:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1310 states have (on average 1.130534351145038) internal successors, (1481), 1310 states have internal predecessors, (1481), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1485 transitions. [2022-04-06 19:36:34,511 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1485 transitions. Word has length 83 [2022-04-06 19:36:34,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:34,511 INFO L478 AbstractCegarLoop]: Abstraction has 1315 states and 1485 transitions. [2022-04-06 19:36:34,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 26 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) [2022-04-06 19:36:34,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1485 transitions. [2022-04-06 19:36:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:34,513 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:34,513 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:34,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 19:36:34,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:34,728 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 63 times [2022-04-06 19:36:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:34,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324310904] [2022-04-06 19:36:34,730 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:34,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash 438642597, now seen corresponding path program 64 times [2022-04-06 19:36:34,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:34,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355241752] [2022-04-06 19:36:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:34,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:36,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 19:36:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355241752] [2022-04-06 19:36:36,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355241752] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811981592] [2022-04-06 19:36:36,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:36:36,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:36,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:36,203 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:36,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:36:36,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:36:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:36:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:36,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:36,808 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:36,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2022-04-06 19:36:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-04-06 19:36:36,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:37,027 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:36:37,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:36:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:36:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811981592] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:37,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:37,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 14, 11] total 47 [2022-04-06 19:36:37,115 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:37,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324310904] [2022-04-06 19:36:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324310904] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:37,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:37,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:36:37,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590722764] [2022-04-06 19:36:37,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:37,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:36:37,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:36:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:36:37,116 INFO L87 Difference]: Start difference. First operand 1315 states and 1485 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:36:44,216 INFO L93 Difference]: Finished difference Result 3683 states and 4148 transitions. [2022-04-06 19:36:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:36:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 83 [2022-04-06 19:36:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:36:44,221 INFO L225 Difference]: With dead ends: 3683 [2022-04-06 19:36:44,221 INFO L226 Difference]: Without dead ends: 3678 [2022-04-06 19:36:44,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=562, Invalid=4408, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:36:44,222 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 285 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:36:44,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 123 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:36:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2022-04-06 19:36:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1442. [2022-04-06 19:36:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1437 states have (on average 1.1329157967988865) internal successors, (1628), 1437 states have internal predecessors, (1628), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1632 transitions. [2022-04-06 19:36:46,263 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1632 transitions. Word has length 83 [2022-04-06 19:36:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:36:46,264 INFO L478 AbstractCegarLoop]: Abstraction has 1442 states and 1632 transitions. [2022-04-06 19:36:46,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:36:46,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1632 transitions. [2022-04-06 19:36:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:36:46,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:36:46,266 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:36:46,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 19:36:46,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:36:46,483 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:36:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:36:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 65 times [2022-04-06 19:36:46,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:46,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1514145774] [2022-04-06 19:36:46,484 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:36:46,484 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:36:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash -393734198, now seen corresponding path program 66 times [2022-04-06 19:36:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:36:46,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917453345] [2022-04-06 19:36:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:36:46,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:36:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:46,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:36:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:36:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:36:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:36:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917453345] [2022-04-06 19:36:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917453345] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:36:46,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582933726] [2022-04-06 19:36:46,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:36:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:36:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:36:46,697 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:36:46,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:36:46,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:36:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:36:46,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:36:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:36:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:36:47,410 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:36:47,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 19:36:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 19:36:47,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:36:47,701 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 19:36:47,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 19:36:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 19:36:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582933726] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:36:47,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:36:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 36 [2022-04-06 19:36:47,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:36:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1514145774] [2022-04-06 19:36:47,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1514145774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:36:47,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:36:47,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:36:47,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782469219] [2022-04-06 19:36:47,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:36:47,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:36:47,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:36:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:36:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:36:47,729 INFO L87 Difference]: Start difference. First operand 1442 states and 1632 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:00,286 INFO L93 Difference]: Finished difference Result 7635 states and 8725 transitions. [2022-04-06 19:37:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:37:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 19:37:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:00,295 INFO L225 Difference]: With dead ends: 7635 [2022-04-06 19:37:00,295 INFO L226 Difference]: Without dead ends: 7586 [2022-04-06 19:37:00,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:37:00,296 INFO L913 BasicCegarLoop]: 194 mSDtfsCounter, 440 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3501 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 3530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:00,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 271 Invalid, 3530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3501 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:37:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7586 states. [2022-04-06 19:37:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7586 to 1444. [2022-04-06 19:37:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1439 states have (on average 1.1334259902710215) internal successors, (1631), 1439 states have internal predecessors, (1631), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:02,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 1635 transitions. [2022-04-06 19:37:02,370 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 1635 transitions. Word has length 83 [2022-04-06 19:37:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:02,371 INFO L478 AbstractCegarLoop]: Abstraction has 1444 states and 1635 transitions. [2022-04-06 19:37:02,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:02,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 1635 transitions. [2022-04-06 19:37:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:37:02,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:02,372 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:02,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:02,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 19:37:02,589 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 67 times [2022-04-06 19:37:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524316948] [2022-04-06 19:37:02,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:02,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash -746829022, now seen corresponding path program 68 times [2022-04-06 19:37:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400149832] [2022-04-06 19:37:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:02,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:37:02,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400149832] [2022-04-06 19:37:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400149832] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742096666] [2022-04-06 19:37:02,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:02,717 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:02,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 19:37:02,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:02,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:37:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:03,622 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:37:03,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:37:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 19:37:03,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:04,274 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-04-06 19:37:04,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 162 [2022-04-06 19:37:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:37:04,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742096666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:04,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:04,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 17] total 46 [2022-04-06 19:37:04,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524316948] [2022-04-06 19:37:04,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524316948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:04,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:04,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:37:04,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695842743] [2022-04-06 19:37:04,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:04,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:37:04,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:37:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1868, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:37:04,742 INFO L87 Difference]: Start difference. First operand 1444 states and 1635 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:10,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:10,368 INFO L93 Difference]: Finished difference Result 3501 states and 3978 transitions. [2022-04-06 19:37:10,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:37:10,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:37:10,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:10,372 INFO L225 Difference]: With dead ends: 3501 [2022-04-06 19:37:10,372 INFO L226 Difference]: Without dead ends: 3260 [2022-04-06 19:37:10,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=285, Invalid=3021, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:37:10,373 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 337 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:10,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 86 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:37:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2022-04-06 19:37:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 1634. [2022-04-06 19:37:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1629 states have (on average 1.1338244321669737) internal successors, (1847), 1629 states have internal predecessors, (1847), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 1851 transitions. [2022-04-06 19:37:12,761 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 1851 transitions. Word has length 85 [2022-04-06 19:37:12,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:12,761 INFO L478 AbstractCegarLoop]: Abstraction has 1634 states and 1851 transitions. [2022-04-06 19:37:12,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:12,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 1851 transitions. [2022-04-06 19:37:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:37:12,763 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:12,763 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:12,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:12,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:12,977 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 69 times [2022-04-06 19:37:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:12,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791313823] [2022-04-06 19:37:12,978 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:12,978 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash -13861041, now seen corresponding path program 70 times [2022-04-06 19:37:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788106735] [2022-04-06 19:37:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:37:13,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:13,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788106735] [2022-04-06 19:37:13,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788106735] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:13,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111627412] [2022-04-06 19:37:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:37:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:13,220 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:13,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 19:37:13,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:37:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:37:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:13,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:37:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 19:37:13,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:14,038 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:37:14,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:37:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-04-06 19:37:14,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111627412] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:14,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:14,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 11] total 39 [2022-04-06 19:37:14,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:14,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791313823] [2022-04-06 19:37:14,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791313823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:14,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:14,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:37:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52482991] [2022-04-06 19:37:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:14,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:37:14,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:37:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:37:14,135 INFO L87 Difference]: Start difference. First operand 1634 states and 1851 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:28,505 INFO L93 Difference]: Finished difference Result 8391 states and 9591 transitions. [2022-04-06 19:37:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:37:28,506 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:37:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:28,525 INFO L225 Difference]: With dead ends: 8391 [2022-04-06 19:37:28,525 INFO L226 Difference]: Without dead ends: 8342 [2022-04-06 19:37:28,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=2888, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:37:28,526 INFO L913 BasicCegarLoop]: 213 mSDtfsCounter, 488 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 3891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:28,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 290 Invalid, 3891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:37:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2022-04-06 19:37:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 1636. [2022-04-06 19:37:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1631 states have (on average 1.1342734518700184) internal successors, (1850), 1631 states have internal predecessors, (1850), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1854 transitions. [2022-04-06 19:37:30,925 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1854 transitions. Word has length 85 [2022-04-06 19:37:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:30,925 INFO L478 AbstractCegarLoop]: Abstraction has 1636 states and 1854 transitions. [2022-04-06 19:37:30,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:30,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1854 transitions. [2022-04-06 19:37:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:37:30,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:30,927 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:30,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:31,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:31,134 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1887668605, now seen corresponding path program 71 times [2022-04-06 19:37:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:31,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1309345153] [2022-04-06 19:37:31,135 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:31,135 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1887668605, now seen corresponding path program 72 times [2022-04-06 19:37:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546245525] [2022-04-06 19:37:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:31,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:37:31,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546245525] [2022-04-06 19:37:31,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546245525] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:31,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403672601] [2022-04-06 19:37:31,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:37:31,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:31,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:31,250 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:31,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 19:37:31,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:37:31,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:37:31,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:31,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:37:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:37:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:31,996 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:37:31,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:37:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:37:32,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403672601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:32,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:32,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 11] total 27 [2022-04-06 19:37:32,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:32,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1309345153] [2022-04-06 19:37:32,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1309345153] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:32,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:32,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:37:32,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93894399] [2022-04-06 19:37:32,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:32,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:37:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:37:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:37:32,049 INFO L87 Difference]: Start difference. First operand 1636 states and 1854 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:37,719 INFO L93 Difference]: Finished difference Result 4774 states and 5480 transitions. [2022-04-06 19:37:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:37:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 85 [2022-04-06 19:37:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:37,724 INFO L225 Difference]: With dead ends: 4774 [2022-04-06 19:37:37,724 INFO L226 Difference]: Without dead ends: 3280 [2022-04-06 19:37:37,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:37:37,726 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 219 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:37,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 114 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:37:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2022-04-06 19:37:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 1509. [2022-04-06 19:37:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1504 states have (on average 1.1316489361702127) internal successors, (1702), 1504 states have internal predecessors, (1702), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1706 transitions. [2022-04-06 19:37:40,045 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1706 transitions. Word has length 85 [2022-04-06 19:37:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:40,045 INFO L478 AbstractCegarLoop]: Abstraction has 1509 states and 1706 transitions. [2022-04-06 19:37:40,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1706 transitions. [2022-04-06 19:37:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:37:40,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:40,046 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:40,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:40,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:40,259 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 73 times [2022-04-06 19:37:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:40,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018202155] [2022-04-06 19:37:40,260 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:40,261 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:40,261 INFO L85 PathProgramCache]: Analyzing trace with hash -760945305, now seen corresponding path program 74 times [2022-04-06 19:37:40,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:40,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021762260] [2022-04-06 19:37:40,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:40,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:40,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:37:40,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021762260] [2022-04-06 19:37:40,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021762260] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:40,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389199244] [2022-04-06 19:37:40,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:37:40,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:40,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:40,432 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:40,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 19:37:40,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:37:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:37:40,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:41,406 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:37:41,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:37:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 19:37:41,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:42,122 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-04-06 19:37:42,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 162 [2022-04-06 19:37:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:37:42,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389199244] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:42,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:42,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 17] total 47 [2022-04-06 19:37:42,402 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018202155] [2022-04-06 19:37:42,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018202155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:42,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:42,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:37:42,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177208602] [2022-04-06 19:37:42,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:42,403 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:37:42,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:37:42,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:37:42,403 INFO L87 Difference]: Start difference. First operand 1509 states and 1706 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:37:49,233 INFO L93 Difference]: Finished difference Result 4026 states and 4581 transitions. [2022-04-06 19:37:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:37:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:37:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:37:49,237 INFO L225 Difference]: With dead ends: 4026 [2022-04-06 19:37:49,237 INFO L226 Difference]: Without dead ends: 3785 [2022-04-06 19:37:49,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=3152, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:37:49,238 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 302 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:37:49,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 123 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:37:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2022-04-06 19:37:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 1509. [2022-04-06 19:37:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1504 states have (on average 1.1316489361702127) internal successors, (1702), 1504 states have internal predecessors, (1702), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1706 transitions. [2022-04-06 19:37:51,558 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1706 transitions. Word has length 87 [2022-04-06 19:37:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:37:51,559 INFO L478 AbstractCegarLoop]: Abstraction has 1509 states and 1706 transitions. [2022-04-06 19:37:51,559 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:37:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1706 transitions. [2022-04-06 19:37:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:37:51,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:37:51,560 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:37:51,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 19:37:51,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 19:37:51,768 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:37:51,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:37:51,768 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 75 times [2022-04-06 19:37:51,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:51,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1933435874] [2022-04-06 19:37:51,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:37:51,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:37:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash -27977324, now seen corresponding path program 76 times [2022-04-06 19:37:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:37:51,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817910333] [2022-04-06 19:37:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:37:51,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:37:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:52,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:37:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:37:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:37:52,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:37:52,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817910333] [2022-04-06 19:37:52,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817910333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:37:52,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960172789] [2022-04-06 19:37:52,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:37:52,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:37:52,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:37:52,014 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:37:52,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 19:37:52,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:37:52,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:37:52,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:37:52,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:37:52,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:37:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:37:52,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:37:52,802 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:37:52,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:37:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 12 proven. 90 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-04-06 19:37:52,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960172789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:37:52,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:37:52,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 11] total 40 [2022-04-06 19:37:52,872 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:37:52,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1933435874] [2022-04-06 19:37:52,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1933435874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:37:52,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:37:52,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:37:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156124980] [2022-04-06 19:37:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:37:52,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:37:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:37:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:37:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:37:52,873 INFO L87 Difference]: Start difference. First operand 1509 states and 1706 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:09,897 INFO L93 Difference]: Finished difference Result 9020 states and 10309 transitions. [2022-04-06 19:38:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:38:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:38:09,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:09,906 INFO L225 Difference]: With dead ends: 9020 [2022-04-06 19:38:09,906 INFO L226 Difference]: Without dead ends: 8971 [2022-04-06 19:38:09,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=3108, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:38:09,907 INFO L913 BasicCegarLoop]: 232 mSDtfsCounter, 520 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4737 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:09,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4737 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:38:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-04-06 19:38:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 1511. [2022-04-06 19:38:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1506 states have (on average 1.1321381142098275) internal successors, (1705), 1506 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1709 transitions. [2022-04-06 19:38:12,312 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1709 transitions. Word has length 87 [2022-04-06 19:38:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:12,312 INFO L478 AbstractCegarLoop]: Abstraction has 1511 states and 1709 transitions. [2022-04-06 19:38:12,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1709 transitions. [2022-04-06 19:38:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:38:12,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:12,314 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:12,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:12,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 19:38:12,530 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 77 times [2022-04-06 19:38:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [351116199] [2022-04-06 19:38:12,532 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:12,532 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1441791380, now seen corresponding path program 78 times [2022-04-06 19:38:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701222836] [2022-04-06 19:38:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:38:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701222836] [2022-04-06 19:38:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701222836] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838452249] [2022-04-06 19:38:12,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:38:12,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:12,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:12,696 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:12,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 19:38:12,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 19:38:12,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:12,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 19:38:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:14,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:38:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:38:14,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:38:14,621 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:38:14,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-04-06 19:38:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 27 proven. 117 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 19:38:14,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:15,708 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-04-06 19:38:15,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 1 [2022-04-06 19:38:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-04-06 19:38:15,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838452249] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:15,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:15,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 30, 21] total 61 [2022-04-06 19:38:15,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [351116199] [2022-04-06 19:38:15,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [351116199] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:15,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:15,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:38:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797835657] [2022-04-06 19:38:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:15,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:38:15,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:15,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:38:15,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=3151, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:38:15,739 INFO L87 Difference]: Start difference. First operand 1511 states and 1709 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:24,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:24,610 INFO L93 Difference]: Finished difference Result 4818 states and 5483 transitions. [2022-04-06 19:38:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:38:24,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 19:38:24,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:24,616 INFO L225 Difference]: With dead ends: 4818 [2022-04-06 19:38:24,616 INFO L226 Difference]: Without dead ends: 4577 [2022-04-06 19:38:24,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:38:24,617 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 365 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:24,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 142 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:38:24,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4577 states. [2022-04-06 19:38:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4577 to 1511. [2022-04-06 19:38:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1506 states have (on average 1.1321381142098275) internal successors, (1705), 1506 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1709 transitions. [2022-04-06 19:38:27,154 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1709 transitions. Word has length 89 [2022-04-06 19:38:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:27,155 INFO L478 AbstractCegarLoop]: Abstraction has 1511 states and 1709 transitions. [2022-04-06 19:38:27,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1709 transitions. [2022-04-06 19:38:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:38:27,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:27,157 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:27,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:27,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:27,359 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 79 times [2022-04-06 19:38:27,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550845177] [2022-04-06 19:38:27,360 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:27,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -708823399, now seen corresponding path program 80 times [2022-04-06 19:38:27,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:27,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532985721] [2022-04-06 19:38:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:27,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:38:27,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:27,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532985721] [2022-04-06 19:38:27,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532985721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:27,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729293957] [2022-04-06 19:38:27,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:38:27,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:27,616 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:27,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 19:38:27,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:38:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:38:27,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:28,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:38:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 19:38:28,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:28,440 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:38:28,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:38:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 13 proven. 95 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-04-06 19:38:28,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729293957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:28,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:28,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 11] total 41 [2022-04-06 19:38:28,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:28,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [550845177] [2022-04-06 19:38:28,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [550845177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:28,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:28,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:38:28,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374151562] [2022-04-06 19:38:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:28,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:38:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:28,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:38:28,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:38:28,541 INFO L87 Difference]: Start difference. First operand 1511 states and 1709 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:38:48,443 INFO L93 Difference]: Finished difference Result 9776 states and 11175 transitions. [2022-04-06 19:38:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:38:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 19:38:48,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:38:48,454 INFO L225 Difference]: With dead ends: 9776 [2022-04-06 19:38:48,454 INFO L226 Difference]: Without dead ends: 9727 [2022-04-06 19:38:48,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=3336, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:38:48,455 INFO L913 BasicCegarLoop]: 251 mSDtfsCounter, 560 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5424 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 5456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:38:48,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 343 Invalid, 5456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5424 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 19:38:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9727 states. [2022-04-06 19:38:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9727 to 1513. [2022-04-06 19:38:51,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1508 states have (on average 1.1326259946949602) internal successors, (1708), 1508 states have internal predecessors, (1708), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1712 transitions. [2022-04-06 19:38:51,008 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1712 transitions. Word has length 89 [2022-04-06 19:38:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:38:51,008 INFO L478 AbstractCegarLoop]: Abstraction has 1513 states and 1712 transitions. [2022-04-06 19:38:51,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:38:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1712 transitions. [2022-04-06 19:38:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:38:51,010 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:38:51,010 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:38:51,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 19:38:51,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:51,220 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:38:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:38:51,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 81 times [2022-04-06 19:38:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:51,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [325205783] [2022-04-06 19:38:51,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:38:51,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:38:51,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1395126833, now seen corresponding path program 82 times [2022-04-06 19:38:51,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:38:51,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352464587] [2022-04-06 19:38:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:38:51,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:38:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:38:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:38:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:38:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:38:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352464587] [2022-04-06 19:38:51,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352464587] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:38:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213021796] [2022-04-06 19:38:51,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:38:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:38:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:38:51,403 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:38:51,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 19:38:51,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:38:51,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:38:51,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:38:51,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:38:52,260 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:38:52,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:38:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 19:38:52,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:38:55,532 INFO L356 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2022-04-06 19:38:55,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2022-04-06 19:38:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 11 proven. 93 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-04-06 19:38:55,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213021796] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:38:55,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:38:55,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 18] total 51 [2022-04-06 19:38:55,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:38:55,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [325205783] [2022-04-06 19:38:55,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [325205783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:38:55,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:38:55,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:38:55,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845497775] [2022-04-06 19:38:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:38:55,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:38:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:38:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:38:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2317, Unknown=5, NotChecked=0, Total=2550 [2022-04-06 19:38:55,588 INFO L87 Difference]: Start difference. First operand 1513 states and 1712 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:06,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:06,866 INFO L93 Difference]: Finished difference Result 5528 states and 6295 transitions. [2022-04-06 19:39:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:39:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:39:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:06,871 INFO L225 Difference]: With dead ends: 5528 [2022-04-06 19:39:06,871 INFO L226 Difference]: Without dead ends: 5287 [2022-04-06 19:39:06,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=311, Invalid=3974, Unknown=5, NotChecked=0, Total=4290 [2022-04-06 19:39:06,873 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 383 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:06,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 166 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:39:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5287 states. [2022-04-06 19:39:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5287 to 1467. [2022-04-06 19:39:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1462 states have (on average 1.131326949384405) internal successors, (1654), 1462 states have internal predecessors, (1654), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 1658 transitions. [2022-04-06 19:39:09,387 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 1658 transitions. Word has length 91 [2022-04-06 19:39:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:09,387 INFO L478 AbstractCegarLoop]: Abstraction has 1467 states and 1658 transitions. [2022-04-06 19:39:09,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 1658 transitions. [2022-04-06 19:39:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:39:09,389 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:09,389 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:09,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:09,590 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:09,590 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 83 times [2022-04-06 19:39:09,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:09,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1605074073] [2022-04-06 19:39:09,591 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:09,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2128094814, now seen corresponding path program 84 times [2022-04-06 19:39:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438985743] [2022-04-06 19:39:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:39:09,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438985743] [2022-04-06 19:39:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438985743] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245435339] [2022-04-06 19:39:09,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:39:09,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:09,907 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:09,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 19:39:10,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:39:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:39:10,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:10,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:39:10,706 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:39:10,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-04-06 19:39:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-04-06 19:39:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:10,997 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-04-06 19:39:10,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 1 [2022-04-06 19:39:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-04-06 19:39:11,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245435339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:11,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:11,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 11] total 40 [2022-04-06 19:39:11,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1605074073] [2022-04-06 19:39:11,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1605074073] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:11,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:11,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:39:11,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994163248] [2022-04-06 19:39:11,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:11,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:39:11,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:39:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:39:11,025 INFO L87 Difference]: Start difference. First operand 1467 states and 1658 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:34,157 INFO L93 Difference]: Finished difference Result 10532 states and 12041 transitions. [2022-04-06 19:39:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:39:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:39:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:34,168 INFO L225 Difference]: With dead ends: 10532 [2022-04-06 19:39:34,168 INFO L226 Difference]: Without dead ends: 10483 [2022-04-06 19:39:34,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=3228, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:39:34,170 INFO L913 BasicCegarLoop]: 270 mSDtfsCounter, 591 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6156 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 6190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:34,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 367 Invalid, 6190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6156 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 19:39:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10483 states. [2022-04-06 19:39:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10483 to 1469. [2022-04-06 19:39:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1464 states have (on average 1.1318306010928962) internal successors, (1657), 1464 states have internal predecessors, (1657), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1661 transitions. [2022-04-06 19:39:36,783 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1661 transitions. Word has length 91 [2022-04-06 19:39:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:36,784 INFO L478 AbstractCegarLoop]: Abstraction has 1469 states and 1661 transitions. [2022-04-06 19:39:36,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1661 transitions. [2022-04-06 19:39:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 19:39:36,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:36,785 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:36,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:37,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:37,002 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 85 times [2022-04-06 19:39:37,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294356165] [2022-04-06 19:39:37,003 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:37,003 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:37,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1388329719, now seen corresponding path program 86 times [2022-04-06 19:39:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:37,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207829961] [2022-04-06 19:39:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:37,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 54 proven. 76 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 19:39:37,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207829961] [2022-04-06 19:39:37,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207829961] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:37,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439332699] [2022-04-06 19:39:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:39:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:37,127 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:37,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 19:39:37,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:39:37,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:39:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:37,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:39:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-04-06 19:39:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:37,866 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:39:37,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:39:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-04-06 19:39:37,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439332699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:37,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:37,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 11] total 32 [2022-04-06 19:39:37,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294356165] [2022-04-06 19:39:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294356165] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:37,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:37,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:39:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422128742] [2022-04-06 19:39:37,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:37,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:39:37,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:39:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:39:37,940 INFO L87 Difference]: Start difference. First operand 1469 states and 1661 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:41,392 INFO L93 Difference]: Finished difference Result 2373 states and 2686 transitions. [2022-04-06 19:39:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:39:41,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-04-06 19:39:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:41,394 INFO L225 Difference]: With dead ends: 2373 [2022-04-06 19:39:41,394 INFO L226 Difference]: Without dead ends: 1507 [2022-04-06 19:39:41,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:39:41,401 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 143 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:41,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 93 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:39:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-04-06 19:39:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1272. [2022-04-06 19:39:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1267 states have (on average 1.1286503551696923) internal successors, (1430), 1267 states have internal predecessors, (1430), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1434 transitions. [2022-04-06 19:39:43,837 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1434 transitions. Word has length 92 [2022-04-06 19:39:43,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:43,837 INFO L478 AbstractCegarLoop]: Abstraction has 1272 states and 1434 transitions. [2022-04-06 19:39:43,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:43,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1434 transitions. [2022-04-06 19:39:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:39:43,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:43,839 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:43,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:44,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 19:39:44,057 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 87 times [2022-04-06 19:39:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:44,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1427246021] [2022-04-06 19:39:44,059 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:44,059 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 88 times [2022-04-06 19:39:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:44,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364935257] [2022-04-06 19:39:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:44,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:44,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:39:44,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364935257] [2022-04-06 19:39:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364935257] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:44,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911417675] [2022-04-06 19:39:44,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:39:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:44,192 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:44,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 19:39:44,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:39:44,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:39:44,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:39:44,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:39:44,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911417675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:44,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:44,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 26 [2022-04-06 19:39:44,925 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:44,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1427246021] [2022-04-06 19:39:44,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1427246021] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:44,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:44,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:39:44,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001461811] [2022-04-06 19:39:44,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:44,925 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:39:44,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:44,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:39:44,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:39:44,926 INFO L87 Difference]: Start difference. First operand 1272 states and 1434 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:49,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:39:49,080 INFO L93 Difference]: Finished difference Result 1719 states and 1938 transitions. [2022-04-06 19:39:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:39:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:39:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:39:49,087 INFO L225 Difference]: With dead ends: 1719 [2022-04-06 19:39:49,087 INFO L226 Difference]: Without dead ends: 1714 [2022-04-06 19:39:49,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:39:49,088 INFO L913 BasicCegarLoop]: 139 mSDtfsCounter, 258 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:39:49,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 186 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:39:49,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-04-06 19:39:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1449. [2022-04-06 19:39:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1444 states have (on average 1.1336565096952909) internal successors, (1637), 1444 states have internal predecessors, (1637), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 1641 transitions. [2022-04-06 19:39:52,010 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 1641 transitions. Word has length 93 [2022-04-06 19:39:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:39:52,011 INFO L478 AbstractCegarLoop]: Abstraction has 1449 states and 1641 transitions. [2022-04-06 19:39:52,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:39:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 1641 transitions. [2022-04-06 19:39:52,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:39:52,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:39:52,012 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:39:52,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 19:39:52,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:52,223 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:39:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:39:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 89 times [2022-04-06 19:39:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:52,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714113268] [2022-04-06 19:39:52,225 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:39:52,225 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:39:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 90 times [2022-04-06 19:39:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:39:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757520401] [2022-04-06 19:39:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:39:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:39:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:39:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:39:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 19:39:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:39:53,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757520401] [2022-04-06 19:39:53,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757520401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:39:53,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874145293] [2022-04-06 19:39:53,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:39:53,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:39:53,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:39:53,158 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:39:53,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 19:39:53,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 19:39:53,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:39:53,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 19:39:53,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:39:53,415 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:39:53,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:39:53,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:39:53,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:39:53,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:39:53,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:39:53,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:39:54,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-04-06 19:39:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 124 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 19:39:54,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:39:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 78 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:39:55,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874145293] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:39:55,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:39:55,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 20] total 60 [2022-04-06 19:39:55,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:39:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714113268] [2022-04-06 19:39:55,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714113268] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:39:55,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:39:55,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:39:55,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404856660] [2022-04-06 19:39:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:39:55,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:39:55,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:39:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:39:55,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=3042, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:39:55,465 INFO L87 Difference]: Start difference. First operand 1449 states and 1641 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:00,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:00,335 INFO L93 Difference]: Finished difference Result 1826 states and 2045 transitions. [2022-04-06 19:40:00,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:40:00,335 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:40:00,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:00,337 INFO L225 Difference]: With dead ends: 1826 [2022-04-06 19:40:00,337 INFO L226 Difference]: Without dead ends: 1785 [2022-04-06 19:40:00,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=773, Invalid=5079, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 19:40:00,338 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 271 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:00,338 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 86 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:40:00,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-04-06 19:40:03,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1557. [2022-04-06 19:40:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1552 states have (on average 1.1243556701030928) internal successors, (1745), 1552 states have internal predecessors, (1745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 1749 transitions. [2022-04-06 19:40:03,462 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 1749 transitions. Word has length 93 [2022-04-06 19:40:03,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:03,462 INFO L478 AbstractCegarLoop]: Abstraction has 1557 states and 1749 transitions. [2022-04-06 19:40:03,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 1749 transitions. [2022-04-06 19:40:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:40:03,464 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:03,464 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:03,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:03,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 19:40:03,669 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 91 times [2022-04-06 19:40:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:03,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992412297] [2022-04-06 19:40:03,670 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:03,670 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:03,670 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 92 times [2022-04-06 19:40:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684168373] [2022-04-06 19:40:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:03,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:04,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:40:04,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:04,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684168373] [2022-04-06 19:40:04,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684168373] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:04,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572015827] [2022-04-06 19:40:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:40:04,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:04,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:04,631 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:04,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 19:40:04,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:40:04,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:04,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:40:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:40:05,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:40:05,327 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:40:05,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-04-06 19:40:05,341 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 145 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-06 19:40:05,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:05,529 INFO L356 Elim1Store]: treesize reduction 33, result has 66.0 percent of original size [2022-04-06 19:40:05,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 71 [2022-04-06 19:40:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 19:40:05,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572015827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:05,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:05,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 15] total 47 [2022-04-06 19:40:05,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:05,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992412297] [2022-04-06 19:40:05,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992412297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:05,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:05,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:40:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413658121] [2022-04-06 19:40:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:05,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:40:05,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:40:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:40:05,675 INFO L87 Difference]: Start difference. First operand 1557 states and 1749 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:10,878 INFO L93 Difference]: Finished difference Result 1810 states and 2025 transitions. [2022-04-06 19:40:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:40:10,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 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 93 [2022-04-06 19:40:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:10,880 INFO L225 Difference]: With dead ends: 1810 [2022-04-06 19:40:10,880 INFO L226 Difference]: Without dead ends: 1766 [2022-04-06 19:40:10,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=498, Invalid=3792, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:40:10,881 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 225 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:10,881 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 127 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:40:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2022-04-06 19:40:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 1534. [2022-04-06 19:40:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1529 states have (on average 1.1262262916939176) internal successors, (1722), 1529 states have internal predecessors, (1722), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1726 transitions. [2022-04-06 19:40:14,001 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1726 transitions. Word has length 93 [2022-04-06 19:40:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:14,001 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1726 transitions. [2022-04-06 19:40:14,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1726 transitions. [2022-04-06 19:40:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:40:14,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:14,003 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:14,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:14,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 19:40:14,208 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 93 times [2022-04-06 19:40:14,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124766809] [2022-04-06 19:40:14,209 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:14,209 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 94 times [2022-04-06 19:40:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:14,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725235323] [2022-04-06 19:40:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 110 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 19:40:14,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725235323] [2022-04-06 19:40:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725235323] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:14,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048739517] [2022-04-06 19:40:14,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:40:14,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:14,794 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:14,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 19:40:14,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:40:14,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:14,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:40:14,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:15,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:40:15,518 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:40:15,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-04-06 19:40:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 35 proven. 112 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 19:40:15,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:15,702 INFO L356 Elim1Store]: treesize reduction 23, result has 74.7 percent of original size [2022-04-06 19:40:15,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 75 [2022-04-06 19:40:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 19:40:15,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048739517] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:15,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:15,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 39 [2022-04-06 19:40:15,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:15,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124766809] [2022-04-06 19:40:15,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124766809] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:15,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:15,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:40:15,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138428154] [2022-04-06 19:40:15,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:15,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:40:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:40:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:40:15,844 INFO L87 Difference]: Start difference. First operand 1534 states and 1726 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:20,690 INFO L93 Difference]: Finished difference Result 1789 states and 2000 transitions. [2022-04-06 19:40:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:40:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:40:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:20,693 INFO L225 Difference]: With dead ends: 1789 [2022-04-06 19:40:20,693 INFO L226 Difference]: Without dead ends: 1771 [2022-04-06 19:40:20,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 170 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=403, Invalid=2677, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:40:20,715 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 201 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:20,715 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 105 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:40:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-04-06 19:40:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1631. [2022-04-06 19:40:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1626 states have (on average 1.1186961869618697) internal successors, (1819), 1626 states have internal predecessors, (1819), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 1823 transitions. [2022-04-06 19:40:24,233 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 1823 transitions. Word has length 93 [2022-04-06 19:40:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:24,234 INFO L478 AbstractCegarLoop]: Abstraction has 1631 states and 1823 transitions. [2022-04-06 19:40:24,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 1823 transitions. [2022-04-06 19:40:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:40:24,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:24,236 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:24,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:24,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 19:40:24,451 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 95 times [2022-04-06 19:40:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738677561] [2022-04-06 19:40:24,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:24,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:24,453 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 96 times [2022-04-06 19:40:24,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:24,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467997514] [2022-04-06 19:40:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:24,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:25,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:40:25,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467997514] [2022-04-06 19:40:25,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467997514] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:25,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487490897] [2022-04-06 19:40:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:40:25,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:25,288 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:25,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 19:40:25,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 19:40:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:40:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:26,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:40:26,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:40:26,194 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:40:26,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2022-04-06 19:40:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-04-06 19:40:26,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:26,458 INFO L356 Elim1Store]: treesize reduction 27, result has 72.2 percent of original size [2022-04-06 19:40:26,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 77 [2022-04-06 19:40:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 19:40:26,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487490897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:26,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:26,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 15] total 46 [2022-04-06 19:40:26,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738677561] [2022-04-06 19:40:26,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738677561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:26,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:26,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:40:26,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058680937] [2022-04-06 19:40:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:26,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:40:26,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:40:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1820, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:40:26,671 INFO L87 Difference]: Start difference. First operand 1631 states and 1823 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:31,836 INFO L93 Difference]: Finished difference Result 1778 states and 1985 transitions. [2022-04-06 19:40:31,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:40:31,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 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 93 [2022-04-06 19:40:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:31,838 INFO L225 Difference]: With dead ends: 1778 [2022-04-06 19:40:31,838 INFO L226 Difference]: Without dead ends: 1760 [2022-04-06 19:40:31,839 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=542, Invalid=3880, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:40:31,839 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 242 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:31,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 95 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:40:31,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-04-06 19:40:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1606. [2022-04-06 19:40:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1601 states have (on average 1.1205496564647095) internal successors, (1794), 1601 states have internal predecessors, (1794), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1798 transitions. [2022-04-06 19:40:35,351 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1798 transitions. Word has length 93 [2022-04-06 19:40:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:40:35,352 INFO L478 AbstractCegarLoop]: Abstraction has 1606 states and 1798 transitions. [2022-04-06 19:40:35,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:35,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1798 transitions. [2022-04-06 19:40:35,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:40:35,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:40:35,354 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:40:35,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 19:40:35,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 19:40:35,564 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:40:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:40:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 97 times [2022-04-06 19:40:35,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:35,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [249662213] [2022-04-06 19:40:35,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:40:35,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:40:35,566 INFO L85 PathProgramCache]: Analyzing trace with hash 369296566, now seen corresponding path program 98 times [2022-04-06 19:40:35,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:40:35,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686703092] [2022-04-06 19:40:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:40:35,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:40:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:40:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:40:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:40:35,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:40:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686703092] [2022-04-06 19:40:35,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686703092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:40:35,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40332272] [2022-04-06 19:40:35,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:40:35,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:40:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:40:35,751 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:40:35,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 19:40:35,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:40:35,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:40:35,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:40:35,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:40:36,682 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-04-06 19:40:36,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 14 [2022-04-06 19:40:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 19:40:36,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:40:37,280 INFO L356 Elim1Store]: treesize reduction 78, result has 65.3 percent of original size [2022-04-06 19:40:37,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 162 [2022-04-06 19:40:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 31 proven. 59 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:40:37,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40332272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:40:37,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:40:37,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 17] total 50 [2022-04-06 19:40:37,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:40:37,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [249662213] [2022-04-06 19:40:37,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [249662213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:40:37,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:40:37,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:40:37,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818370654] [2022-04-06 19:40:37,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:40:37,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:40:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:40:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:40:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:40:37,523 INFO L87 Difference]: Start difference. First operand 1606 states and 1798 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:40:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:40:56,456 INFO L93 Difference]: Finished difference Result 7188 states and 8166 transitions. [2022-04-06 19:40:56,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:40:56,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:40:56,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:40:56,463 INFO L225 Difference]: With dead ends: 7188 [2022-04-06 19:40:56,463 INFO L226 Difference]: Without dead ends: 6970 [2022-04-06 19:40:56,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:40:56,465 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 577 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2005 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:40:56,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 181 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2005 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:40:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6970 states. [2022-04-06 19:41:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6970 to 1606. [2022-04-06 19:41:00,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1601 states have (on average 1.1205496564647095) internal successors, (1794), 1601 states have internal predecessors, (1794), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 1798 transitions. [2022-04-06 19:41:00,129 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 1798 transitions. Word has length 93 [2022-04-06 19:41:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:00,129 INFO L478 AbstractCegarLoop]: Abstraction has 1606 states and 1798 transitions. [2022-04-06 19:41:00,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 1798 transitions. [2022-04-06 19:41:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:41:00,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:00,131 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:00,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 19:41:00,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:00,336 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:00,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1102264547, now seen corresponding path program 99 times [2022-04-06 19:41:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:00,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945136543] [2022-04-06 19:41:00,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:00,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:00,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1102264547, now seen corresponding path program 100 times [2022-04-06 19:41:00,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:00,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823711194] [2022-04-06 19:41:00,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:00,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:41:00,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823711194] [2022-04-06 19:41:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823711194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716294803] [2022-04-06 19:41:00,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:41:00,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:00,645 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:41:00,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 19:41:00,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:41:00,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:41:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:01,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-04-06 19:41:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-04-06 19:41:01,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:41:01,349 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:41:01,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:41:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-04-06 19:41:01,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716294803] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:41:01,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:41:01,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 11] total 43 [2022-04-06 19:41:01,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:41:01,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945136543] [2022-04-06 19:41:01,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945136543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:41:01,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:41:01,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:41:01,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069355440] [2022-04-06 19:41:01,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:41:01,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:41:01,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:41:01,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:41:01,435 INFO L87 Difference]: Start difference. First operand 1606 states and 1798 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:40,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:40,876 INFO L93 Difference]: Finished difference Result 13920 states and 15881 transitions. [2022-04-06 19:41:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:41:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:41:40,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:40,895 INFO L225 Difference]: With dead ends: 13920 [2022-04-06 19:41:40,896 INFO L226 Difference]: Without dead ends: 13871 [2022-04-06 19:41:40,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=3816, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:41:40,901 INFO L913 BasicCegarLoop]: 289 mSDtfsCounter, 638 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 6607 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:40,901 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 386 Invalid, 6643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 6607 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 19:41:40,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13871 states. [2022-04-06 19:41:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13871 to 1608. [2022-04-06 19:41:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1603 states have (on average 1.1210230817217717) internal successors, (1797), 1603 states have internal predecessors, (1797), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 1801 transitions. [2022-04-06 19:41:44,891 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 1801 transitions. Word has length 93 [2022-04-06 19:41:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:44,891 INFO L478 AbstractCegarLoop]: Abstraction has 1608 states and 1801 transitions. [2022-04-06 19:41:44,891 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 1801 transitions. [2022-04-06 19:41:44,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 19:41:44,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:44,893 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:44,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 19:41:45,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:45,096 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1074909082, now seen corresponding path program 101 times [2022-04-06 19:41:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:45,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217054226] [2022-04-06 19:41:45,097 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:45,097 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1074909082, now seen corresponding path program 102 times [2022-04-06 19:41:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492680905] [2022-04-06 19:41:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:45,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:45,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 19:41:45,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492680905] [2022-04-06 19:41:45,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492680905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400867545] [2022-04-06 19:41:45,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:41:45,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:45,315 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:41:45,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 19:41:45,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 19:41:45,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:45,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:41:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:45,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:41:45,911 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 19:41:45,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 11 [2022-04-06 19:41:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 19:41:45,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:41:46,037 INFO L356 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-04-06 19:41:46,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2022-04-06 19:41:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-04-06 19:41:46,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400867545] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:41:46,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:41:46,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 24 [2022-04-06 19:41:46,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:41:46,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217054226] [2022-04-06 19:41:46,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217054226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:41:46,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:41:46,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:41:46,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202215243] [2022-04-06 19:41:46,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:41:46,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:41:46,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:46,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:41:46,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:41:46,082 INFO L87 Difference]: Start difference. First operand 1608 states and 1801 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:41:51,628 INFO L93 Difference]: Finished difference Result 1979 states and 2214 transitions. [2022-04-06 19:41:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:41:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-04-06 19:41:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:41:51,631 INFO L225 Difference]: With dead ends: 1979 [2022-04-06 19:41:51,631 INFO L226 Difference]: Without dead ends: 1974 [2022-04-06 19:41:51,631 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:41:51,631 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 180 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:41:51,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 67 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:41:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1974 states. [2022-04-06 19:41:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1974 to 1665. [2022-04-06 19:41:55,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1660 states have (on average 1.1180722891566266) internal successors, (1856), 1660 states have internal predecessors, (1856), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 1860 transitions. [2022-04-06 19:41:55,783 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 1860 transitions. Word has length 94 [2022-04-06 19:41:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:41:55,783 INFO L478 AbstractCegarLoop]: Abstraction has 1665 states and 1860 transitions. [2022-04-06 19:41:55,783 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:41:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 1860 transitions. [2022-04-06 19:41:55,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 19:41:55,794 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:41:55,794 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:41:55,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 19:41:55,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:55,998 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:41:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:41:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 103 times [2022-04-06 19:41:55,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:41:55,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1786461116] [2022-04-06 19:41:55,999 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:41:55,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:41:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 104 times [2022-04-06 19:41:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:41:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889271642] [2022-04-06 19:41:56,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:41:56,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:41:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:56,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:41:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:41:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:41:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:41:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889271642] [2022-04-06 19:41:56,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889271642] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:41:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830705786] [2022-04-06 19:41:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:41:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:41:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:41:56,175 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:41:56,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 19:41:56,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:41:56,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:41:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:41:56,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:41:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:41:58,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:41:58,141 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 19:41:58,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 24 [2022-04-06 19:41:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 42 proven. 110 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 19:41:58,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:01,088 INFO L356 Elim1Store]: treesize reduction 144, result has 29.8 percent of original size [2022-04-06 19:42:01,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 79 [2022-04-06 19:42:01,146 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 45 proven. 76 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 19:42:01,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830705786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:01,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:01,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27, 23] total 63 [2022-04-06 19:42:01,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:01,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1786461116] [2022-04-06 19:42:01,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1786461116] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:01,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:01,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:42:01,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405177240] [2022-04-06 19:42:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:01,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:42:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:42:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=3415, Unknown=1, NotChecked=0, Total=3906 [2022-04-06 19:42:01,148 INFO L87 Difference]: Start difference. First operand 1665 states and 1860 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2022-04-06 19:42:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:23,827 INFO L93 Difference]: Finished difference Result 7872 states and 8903 transitions. [2022-04-06 19:42:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:42:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 96 [2022-04-06 19:42:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:23,836 INFO L225 Difference]: With dead ends: 7872 [2022-04-06 19:42:23,836 INFO L226 Difference]: Without dead ends: 7754 [2022-04-06 19:42:23,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=678, Invalid=5483, Unknown=1, NotChecked=0, Total=6162 [2022-04-06 19:42:23,837 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 444 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:23,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 196 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:42:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2022-04-06 19:42:28,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 1711. [2022-04-06 19:42:28,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-04-06 19:42:28,050 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 96 [2022-04-06 19:42:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:42:28,050 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-04-06 19:42:28,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2022-04-06 19:42:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-04-06 19:42:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 19:42:28,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:42:28,052 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:42:28,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 19:42:28,269 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 19:42:28,269 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:42:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:42:28,269 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 105 times [2022-04-06 19:42:28,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:28,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398244140] [2022-04-06 19:42:28,270 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:28,270 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:28,270 INFO L85 PathProgramCache]: Analyzing trace with hash -360832456, now seen corresponding path program 106 times [2022-04-06 19:42:28,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:28,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823851447] [2022-04-06 19:42:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:28,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:28,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:42:28,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:42:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:42:28,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:42:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823851447] [2022-04-06 19:42:28,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823851447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:42:28,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905371411] [2022-04-06 19:42:28,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:42:28,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:28,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:42:28,466 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:42:28,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 19:42:28,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:42:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:42:28,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 19:42:28,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:42:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-04-06 19:42:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:42:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:42:29,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905371411] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:42:29,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:42:29,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 38 [2022-04-06 19:42:29,512 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:42:29,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398244140] [2022-04-06 19:42:29,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398244140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:42:29,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:42:29,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:42:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444049844] [2022-04-06 19:42:29,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:42:29,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:42:29,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:42:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:42:29,513 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-04-06 19:42:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:42:55,307 INFO L93 Difference]: Finished difference Result 8755 states and 9907 transitions. [2022-04-06 19:42:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:42:55,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 98 [2022-04-06 19:42:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:42:55,317 INFO L225 Difference]: With dead ends: 8755 [2022-04-06 19:42:55,317 INFO L226 Difference]: Without dead ends: 8637 [2022-04-06 19:42:55,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:42:55,318 INFO L913 BasicCegarLoop]: 153 mSDtfsCounter, 488 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:42:55,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 220 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:42:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2022-04-06 19:42:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 1711. [2022-04-06 19:42:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:42:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-04-06 19:42:59,651 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 98 [2022-04-06 19:42:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:42:59,651 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-04-06 19:42:59,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2022-04-06 19:42:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-04-06 19:42:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 19:42:59,653 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:42:59,653 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:42:59,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 19:42:59,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:42:59,867 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:42:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:42:59,868 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 107 times [2022-04-06 19:42:59,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:42:59,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169408259] [2022-04-06 19:42:59,869 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:42:59,869 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:42:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 409411603, now seen corresponding path program 108 times [2022-04-06 19:42:59,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:42:59,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485694378] [2022-04-06 19:42:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:42:59,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:42:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:00,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:43:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:43:00,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:43:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485694378] [2022-04-06 19:43:00,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485694378] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:43:00,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82156786] [2022-04-06 19:43:00,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:43:00,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:00,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:43:00,089 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:43:00,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 19:43:01,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:43:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:43:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 19:43:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:43:01,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:43:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 51 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 19:43:08,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:43:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 17 proven. 99 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 19:43:12,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82156786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:43:12,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:43:12,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 35, 33] total 83 [2022-04-06 19:43:12,127 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:43:12,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169408259] [2022-04-06 19:43:12,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169408259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:43:12,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:43:12,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:43:12,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168991955] [2022-04-06 19:43:12,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:43:12,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:43:12,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:12,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:43:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=6136, Unknown=8, NotChecked=0, Total=6806 [2022-04-06 19:43:12,129 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:43:41,300 INFO L93 Difference]: Finished difference Result 9638 states and 10911 transitions. [2022-04-06 19:43:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:43:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 100 [2022-04-06 19:43:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:43:41,310 INFO L225 Difference]: With dead ends: 9638 [2022-04-06 19:43:41,310 INFO L226 Difference]: Without dead ends: 9520 [2022-04-06 19:43:41,311 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2760 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=848, Invalid=9244, Unknown=8, NotChecked=0, Total=10100 [2022-04-06 19:43:41,311 INFO L913 BasicCegarLoop]: 172 mSDtfsCounter, 525 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 3070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:43:41,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 244 Invalid, 3070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:43:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-04-06 19:43:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 1711. [2022-04-06 19:43:45,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-04-06 19:43:45,651 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 100 [2022-04-06 19:43:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:43:45,651 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-04-06 19:43:45,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:43:45,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-04-06 19:43:45,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 19:43:45,654 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:43:45,654 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:43:45,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 19:43:45,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:45,860 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:43:45,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:43:45,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 109 times [2022-04-06 19:43:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:45,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1499660698] [2022-04-06 19:43:45,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:43:45,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:43:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1879577390, now seen corresponding path program 110 times [2022-04-06 19:43:45,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:43:45,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321855893] [2022-04-06 19:43:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:43:45,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:43:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:46,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:43:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:43:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 19:43:46,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:43:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321855893] [2022-04-06 19:43:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321855893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:43:46,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846847673] [2022-04-06 19:43:46,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:43:46,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:43:46,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:43:46,094 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:43:46,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 19:43:46,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:43:46,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:43:46,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:43:46,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:43:48,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:43:48,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:43:48,299 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 19:43:48,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 24 [2022-04-06 19:43:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 45 proven. 122 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 19:43:48,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:43:49,671 INFO L356 Elim1Store]: treesize reduction 130, result has 0.8 percent of original size [2022-04-06 19:43:49,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 1 [2022-04-06 19:43:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 49 proven. 58 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-04-06 19:43:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846847673] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:43:49,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:43:49,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 27, 22] total 65 [2022-04-06 19:43:49,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:43:49,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1499660698] [2022-04-06 19:43:49,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1499660698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:43:49,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:43:49,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:43:49,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099151199] [2022-04-06 19:43:49,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:43:49,699 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:43:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:43:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:43:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3697, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:43:49,699 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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) [2022-04-06 19:44:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:22,503 INFO L93 Difference]: Finished difference Result 10521 states and 11915 transitions. [2022-04-06 19:44:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:44:22,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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 102 [2022-04-06 19:44:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:22,513 INFO L225 Difference]: With dead ends: 10521 [2022-04-06 19:44:22,513 INFO L226 Difference]: Without dead ends: 10403 [2022-04-06 19:44:22,514 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:44:22,514 INFO L913 BasicCegarLoop]: 189 mSDtfsCounter, 561 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:22,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 266 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:44:22,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10403 states. [2022-04-06 19:44:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10403 to 1711. [2022-04-06 19:44:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1706 states have (on average 1.11957796014068) internal successors, (1910), 1706 states have internal predecessors, (1910), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 1914 transitions. [2022-04-06 19:44:27,096 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 1914 transitions. Word has length 102 [2022-04-06 19:44:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:27,096 INFO L478 AbstractCegarLoop]: Abstraction has 1711 states and 1914 transitions. [2022-04-06 19:44:27,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 19 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) [2022-04-06 19:44:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 1914 transitions. [2022-04-06 19:44:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 19:44:27,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:27,100 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:27,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:27,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 19:44:27,315 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1967412989, now seen corresponding path program 111 times [2022-04-06 19:44:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:27,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1587891712] [2022-04-06 19:44:27,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:27,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1967412989, now seen corresponding path program 112 times [2022-04-06 19:44:27,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:27,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282959411] [2022-04-06 19:44:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:27,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:27,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 82 proven. 118 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 19:44:27,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282959411] [2022-04-06 19:44:27,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282959411] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:27,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179335146] [2022-04-06 19:44:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:27,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:27,891 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:27,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 19:44:28,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 19:44:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:30,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:44:30,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:44:30,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:44:30,739 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-04-06 19:44:30,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 24 [2022-04-06 19:44:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 52 proven. 185 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 19:44:30,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:37,471 INFO L356 Elim1Store]: treesize reduction 138, result has 32.7 percent of original size [2022-04-06 19:44:37,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 85 [2022-04-06 19:44:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 61 proven. 153 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 19:44:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179335146] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:37,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 37, 32] total 83 [2022-04-06 19:44:37,687 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1587891712] [2022-04-06 19:44:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1587891712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:37,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:44:37,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724222833] [2022-04-06 19:44:37,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:37,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:44:37,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:44:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=6033, Unknown=6, NotChecked=0, Total=6806 [2022-04-06 19:44:37,688 INFO L87 Difference]: Start difference. First operand 1711 states and 1914 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) [2022-04-06 19:44:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:43,825 INFO L93 Difference]: Finished difference Result 1825 states and 2032 transitions. [2022-04-06 19:44:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:44:43,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 103 [2022-04-06 19:44:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:43,827 INFO L225 Difference]: With dead ends: 1825 [2022-04-06 19:44:43,827 INFO L226 Difference]: Without dead ends: 1233 [2022-04-06 19:44:43,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3863 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1020, Invalid=8676, Unknown=6, NotChecked=0, Total=9702 [2022-04-06 19:44:43,828 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 191 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:43,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 63 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:44:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-04-06 19:44:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2022-04-06 19:44:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1228 states have (on average 1.1441368078175895) internal successors, (1405), 1228 states have internal predecessors, (1405), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1409 transitions. [2022-04-06 19:44:47,309 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1409 transitions. Word has length 103 [2022-04-06 19:44:47,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:47,309 INFO L478 AbstractCegarLoop]: Abstraction has 1233 states and 1409 transitions. [2022-04-06 19:44:47,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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) [2022-04-06 19:44:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1409 transitions. [2022-04-06 19:44:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 19:44:47,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:47,310 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:47,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:47,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 19:44:47,528 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1978314966, now seen corresponding path program 113 times [2022-04-06 19:44:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:47,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744028028] [2022-04-06 19:44:47,529 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:47,529 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1978314966, now seen corresponding path program 114 times [2022-04-06 19:44:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:47,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817587623] [2022-04-06 19:44:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:47,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 19:44:47,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817587623] [2022-04-06 19:44:47,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817587623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:47,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810933547] [2022-04-06 19:44:47,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:47,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:47,844 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:47,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 19:44:48,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:44:48,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 19:44:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:48,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:44:48,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-04-06 19:44:48,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-04-06 19:44:48,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-04-06 19:44:48,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-04-06 19:44:48,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-04-06 19:44:51,893 INFO L356 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-04-06 19:44:51,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 64 [2022-04-06 19:44:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 8 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 19:44:51,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 60 proven. 162 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-04-06 19:44:54,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810933547] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:54,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:54,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 43, 41] total 94 [2022-04-06 19:44:54,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:54,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744028028] [2022-04-06 19:44:54,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744028028] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:54,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:54,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:44:54,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449448186] [2022-04-06 19:44:54,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:54,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:44:54,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:54,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:44:54,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=7404, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 19:44:54,697 INFO L87 Difference]: Start difference. First operand 1233 states and 1409 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:45:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:00,639 INFO L93 Difference]: Finished difference Result 1828 states and 2108 transitions. [2022-04-06 19:45:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:45:00,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 104 [2022-04-06 19:45:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:00,641 INFO L225 Difference]: With dead ends: 1828 [2022-04-06 19:45:00,641 INFO L226 Difference]: Without dead ends: 1823 [2022-04-06 19:45:00,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1598, Invalid=9532, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 19:45:00,642 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 190 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:00,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 96 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-04-06 19:45:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1295. [2022-04-06 19:45:04,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1290 states have (on average 1.1449612403100775) internal successors, (1477), 1290 states have internal predecessors, (1477), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1481 transitions. [2022-04-06 19:45:04,470 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1481 transitions. Word has length 104 [2022-04-06 19:45:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:04,470 INFO L478 AbstractCegarLoop]: Abstraction has 1295 states and 1481 transitions. [2022-04-06 19:45:04,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2022-04-06 19:45:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1481 transitions. [2022-04-06 19:45:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 19:45:04,472 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:04,472 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:04,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:04,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,690 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1582654790, now seen corresponding path program 115 times [2022-04-06 19:45:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:04,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503737222] [2022-04-06 19:45:04,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:04,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1582654790, now seen corresponding path program 116 times [2022-04-06 19:45:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388635929] [2022-04-06 19:45:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:04,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 19:45:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388635929] [2022-04-06 19:45:04,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388635929] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172568810] [2022-04-06 19:45:04,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:04,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:04,852 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:04,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 19:45:05,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:05,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:45:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 19:45:05,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 252 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 19:45:05,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172568810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:05,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2022-04-06 19:45:05,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:05,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503737222] [2022-04-06 19:45:05,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503737222] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:05,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:05,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:45:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702704674] [2022-04-06 19:45:05,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:05,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:45:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:05,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:45:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:45:05,837 INFO L87 Difference]: Start difference. First operand 1295 states and 1481 transitions. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 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) [2022-04-06 19:45:13,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:13,883 INFO L93 Difference]: Finished difference Result 2029 states and 2308 transitions. [2022-04-06 19:45:13,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:45:13,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 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 114 [2022-04-06 19:45:13,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:13,886 INFO L225 Difference]: With dead ends: 2029 [2022-04-06 19:45:13,886 INFO L226 Difference]: Without dead ends: 2024 [2022-04-06 19:45:13,886 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=2509, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:45:13,886 INFO L913 BasicCegarLoop]: 192 mSDtfsCounter, 320 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:13,886 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 249 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:45:13,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2022-04-06 19:45:18,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1524. [2022-04-06 19:45:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1524 states, 1519 states have (on average 1.1441737985516787) internal successors, (1738), 1519 states have internal predecessors, (1738), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 1742 transitions. [2022-04-06 19:45:18,368 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 1742 transitions. Word has length 114 [2022-04-06 19:45:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:18,368 INFO L478 AbstractCegarLoop]: Abstraction has 1524 states and 1742 transitions. [2022-04-06 19:45:18,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 13 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) [2022-04-06 19:45:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 1742 transitions. [2022-04-06 19:45:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 19:45:18,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:18,369 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:18,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:18,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:18,583 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 995848776, now seen corresponding path program 117 times [2022-04-06 19:45:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:18,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649025736] [2022-04-06 19:45:18,584 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:18,584 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 995848776, now seen corresponding path program 118 times [2022-04-06 19:45:18,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304053098] [2022-04-06 19:45:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:19,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 223 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-04-06 19:45:19,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304053098] [2022-04-06 19:45:19,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304053098] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:19,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400482062] [2022-04-06 19:45:19,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:19,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:19,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:19,242 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:19,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 19:45:19,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:19,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:19,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 19:45:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:19,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-04-06 19:45:22,791 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-04-06 19:45:22,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 34 [2022-04-06 19:45:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 50 proven. 267 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 19:45:22,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:26,004 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 77 proven. 195 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-04-06 19:45:26,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400482062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:26,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:26,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 48, 35] total 100 [2022-04-06 19:45:26,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:26,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649025736] [2022-04-06 19:45:26,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649025736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:26,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:26,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:45:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883789567] [2022-04-06 19:45:26,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:26,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:45:26,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:45:26,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1345, Invalid=8554, Unknown=1, NotChecked=0, Total=9900 [2022-04-06 19:45:26,006 INFO L87 Difference]: Start difference. First operand 1524 states and 1742 transitions. Second operand has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 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) [2022-04-06 19:45:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:39,857 INFO L93 Difference]: Finished difference Result 4884 states and 5566 transitions. [2022-04-06 19:45:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:45:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 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 114 [2022-04-06 19:45:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:39,867 INFO L225 Difference]: With dead ends: 4884 [2022-04-06 19:45:39,867 INFO L226 Difference]: Without dead ends: 3996 [2022-04-06 19:45:39,869 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 155 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5921 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1870, Invalid=12649, Unknown=1, NotChecked=0, Total=14520 [2022-04-06 19:45:39,869 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 301 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:39,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 102 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:45:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2022-04-06 19:45:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 2514. [2022-04-06 19:45:47,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2514 states, 2509 states have (on average 1.1219609406137903) internal successors, (2815), 2509 states have internal predecessors, (2815), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 2819 transitions. [2022-04-06 19:45:47,155 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 2819 transitions. Word has length 114 [2022-04-06 19:45:47,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:47,156 INFO L478 AbstractCegarLoop]: Abstraction has 2514 states and 2819 transitions. [2022-04-06 19:45:47,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.045454545454546) internal successors, (89), 21 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) [2022-04-06 19:45:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 2819 transitions. [2022-04-06 19:45:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 19:45:47,158 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:47,159 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:47,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 19:45:47,371 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:47,371 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -222783544, now seen corresponding path program 119 times [2022-04-06 19:45:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [157707305] [2022-04-06 19:45:47,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:47,372 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:47,372 INFO L85 PathProgramCache]: Analyzing trace with hash -222783544, now seen corresponding path program 120 times [2022-04-06 19:45:47,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111779120] [2022-04-06 19:45:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:48,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 82 proven. 175 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 19:45:48,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111779120] [2022-04-06 19:45:48,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111779120] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794604740] [2022-04-06 19:45:48,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:48,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:48,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:48,065 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:48,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 19:45:48,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-04-06 19:45:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:48,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 19:45:48,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:48,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-04-06 19:45:48,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 19:45:48,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 19:45:48,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 19:45:48,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-04-06 19:45:48,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 19:45:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 92 proven. 185 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-04-06 19:45:49,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 143 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 19:45:49,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794604740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:49,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:49,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 17] total 54 [2022-04-06 19:45:49,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:49,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [157707305] [2022-04-06 19:45:49,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [157707305] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:49,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:49,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:45:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016995585] [2022-04-06 19:45:49,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:49,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:45:49,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:45:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=2483, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:45:49,795 INFO L87 Difference]: Start difference. First operand 2514 states and 2819 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 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) [2022-04-06 19:46:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:05,544 INFO L93 Difference]: Finished difference Result 5218 states and 5858 transitions. [2022-04-06 19:46:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:46:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 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 114 [2022-04-06 19:46:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:05,548 INFO L225 Difference]: With dead ends: 5218 [2022-04-06 19:46:05,548 INFO L226 Difference]: Without dead ends: 5051 [2022-04-06 19:46:05,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=609, Invalid=4361, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:46:05,549 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 282 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:05,549 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 70 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:05,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2022-04-06 19:46:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3777. [2022-04-06 19:46:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3772 states have (on average 1.116118769883351) internal successors, (4210), 3772 states have internal predecessors, (4210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 4214 transitions. [2022-04-06 19:46:16,138 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 4214 transitions. Word has length 114 [2022-04-06 19:46:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:16,139 INFO L478 AbstractCegarLoop]: Abstraction has 3777 states and 4214 transitions. [2022-04-06 19:46:16,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 19 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) [2022-04-06 19:46:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 4214 transitions. [2022-04-06 19:46:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 19:46:16,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:16,142 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:16,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:16,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:16,347 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash 844294156, now seen corresponding path program 121 times [2022-04-06 19:46:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:16,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [996163804] [2022-04-06 19:46:16,348 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:16,348 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash 844294156, now seen corresponding path program 122 times [2022-04-06 19:46:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:16,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271337818] [2022-04-06 19:46:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 227 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 19:46:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271337818] [2022-04-06 19:46:17,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271337818] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391059053] [2022-04-06 19:46:17,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:17,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:17,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:17,015 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:17,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 19:46:17,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:17,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 19:46:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:19,895 INFO L356 Elim1Store]: treesize reduction 59, result has 30.6 percent of original size [2022-04-06 19:46:19,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 48 [2022-04-06 19:46:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 29 proven. 281 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-06 19:46:19,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:22,295 INFO L356 Elim1Store]: treesize reduction 466, result has 20.9 percent of original size [2022-04-06 19:46:22,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 120 treesize of output 148 [2022-04-06 19:47:36,266 WARN L232 SmtUtils]: Spent 1.23m on a formula simplification. DAG size of input: 8241 DAG size of output: 8218 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)