/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/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:29:54,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:29:54,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:29:54,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:29:54,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:29:54,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:29:54,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:29:54,509 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 19:29:54,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:29:54,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:29:54,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:29:54,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:29:54,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:29:54,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:29:54,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:29:54,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:29:54,521 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:54,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:29:54,522 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:29:54,523 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:29:54,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:29:54,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:29:54,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:29:54,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:29:54,764 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:29:54,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2022-04-06 19:29:54,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c4574c5/d8bb8474dce847748f6cd40cde0b1de8/FLAG22cc7ebf7 [2022-04-06 19:29:55,231 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:29:55,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2022-04-06 19:29:55,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c4574c5/d8bb8474dce847748f6cd40cde0b1de8/FLAG22cc7ebf7 [2022-04-06 19:29:55,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c4574c5/d8bb8474dce847748f6cd40cde0b1de8 [2022-04-06 19:29:55,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:29:55,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:29:55,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:55,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:29:55,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:29:55,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79fdb6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55, skipping insertion in model container [2022-04-06 19:29:55,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:29:55,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:29:55,463 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/eureka_01-1.c[446,459] [2022-04-06 19:29:55,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:55,519 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:29:55,532 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/eureka_01-1.c[446,459] [2022-04-06 19:29:55,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:29:55,577 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:29:55,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55 WrapperNode [2022-04-06 19:29:55,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:29:55,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:29:55,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:29:55,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:29:55,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:29:55,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:29:55,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:29:55,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:29:55,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (1/1) ... [2022-04-06 19:29:55,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:29:55,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:55,669 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 19:29:55,676 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 19:29:55,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:29:55,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:29:55,712 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 19:29:55,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:29:55,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:29:55,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:29:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:29:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 19:29:55,713 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:29:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:29:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:29:55,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:29:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:29:55,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:29:55,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:29:55,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:29:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:29:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:29:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:29:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:29:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:29:55,811 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:29:55,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:29:56,103 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:29:56,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:29:56,108 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-06 19:29:56,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:56 BoogieIcfgContainer [2022-04-06 19:29:56,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:29:56,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:29:56,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:29:56,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:29:56,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:29:55" (1/3) ... [2022-04-06 19:29:56,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37adc53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:56, skipping insertion in model container [2022-04-06 19:29:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:29:55" (2/3) ... [2022-04-06 19:29:56,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37adc53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:29:56, skipping insertion in model container [2022-04-06 19:29:56,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:29:56" (3/3) ... [2022-04-06 19:29:56,120 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2022-04-06 19:29:56,124 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:29:56,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:29:56,166 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:29:56,173 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 19:29:56,174 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:29:56,186 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 19:29:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:29:56,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,192 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,193 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2022-04-06 19:29:56,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134214652] [2022-04-06 19:29:56,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:56,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 2 times [2022-04-06 19:29:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934168763] [2022-04-06 19:29:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,467 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 19:29:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934168763] [2022-04-06 19:29:56,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934168763] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:29:56,471 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:56,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134214652] [2022-04-06 19:29:56,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134214652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:29:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081082163] [2022-04-06 19:29:56,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:56,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:29:56,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:29:56,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:29:56,501 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,547 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-04-06 19:29:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:29:56,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:29:56,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,554 INFO L225 Difference]: With dead ends: 63 [2022-04-06 19:29:56,554 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 19:29:56,557 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 19:29:56,560 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 19:29:56,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 19:29:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-06 19:29:56,594 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-04-06 19:29:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,594 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-06 19:29:56,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-06 19:29:56,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:29:56,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,595 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:29:56,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:29:56,595 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2022-04-06 19:29:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013556486] [2022-04-06 19:29:56,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:29:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 2 times [2022-04-06 19:29:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617816177] [2022-04-06 19:29:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:56,750 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 19:29:56,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:56,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617816177] [2022-04-06 19:29:56,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617816177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:29:56,751 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:56,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013556486] [2022-04-06 19:29:56,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013556486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:56,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:56,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:29:56,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605263743] [2022-04-06 19:29:56,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:56,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:29:56,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:29:56,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 19:29:56,754 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:56,918 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-04-06 19:29:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:29:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:29:56,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:56,920 INFO L225 Difference]: With dead ends: 80 [2022-04-06 19:29:56,920 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 19:29:56,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:29:56,922 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:56,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 19:29:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-04-06 19:29:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:29:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-04-06 19:29:56,933 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2022-04-06 19:29:56,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:56,933 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-04-06 19:29:56,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-06 19:29:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:29:56,934 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:56,934 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] [2022-04-06 19:29:56,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:29:56,935 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:56,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2022-04-06 19:29:56,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:56,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2036227838] [2022-04-06 19:29:56,942 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:56,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 2 times [2022-04-06 19:29:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247477658] [2022-04-06 19:29:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:57,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247477658] [2022-04-06 19:29:57,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247477658] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:57,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447267260] [2022-04-06 19:29:57,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:57,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:57,223 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 19:29:57,249 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 19:29:57,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:57,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:29:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:57,447 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 19:29:57,565 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 19:29:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:57,692 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 14 treesize of output 12 [2022-04-06 19:29:57,697 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 26 treesize of output 24 [2022-04-06 19:29:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447267260] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:57,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:57,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-04-06 19:29:57,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2036227838] [2022-04-06 19:29:57,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2036227838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:57,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:57,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:29:57,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007753633] [2022-04-06 19:29:57,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:57,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:29:57,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:57,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:29:57,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:29:57,738 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:58,044 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-04-06 19:29:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:29:58,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 19:29:58,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:58,048 INFO L225 Difference]: With dead ends: 78 [2022-04-06 19:29:58,048 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 19:29:58,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:29:58,059 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:58,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:29:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 19:29:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-04-06 19:29:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-04-06 19:29:58,070 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2022-04-06 19:29:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:58,070 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-04-06 19:29:58,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-04-06 19:29:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:29:58,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:58,075 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] [2022-04-06 19:29:58,097 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 19:29:58,291 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 19:29:58,292 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2022-04-06 19:29:58,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [469467538] [2022-04-06 19:29:58,294 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 2 times [2022-04-06 19:29:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740218937] [2022-04-06 19:29:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:58,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:58,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:58,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740218937] [2022-04-06 19:29:58,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740218937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:58,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:58,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:58,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:58,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [469467538] [2022-04-06 19:29:58,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [469467538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:58,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:58,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:29:58,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587046021] [2022-04-06 19:29:58,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:58,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:29:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:29:58,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:29:58,338 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:58,388 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-04-06 19:29:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:29:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 19:29:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:58,390 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:29:58,390 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 19:29:58,390 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 19:29:58,391 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:58,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:29:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 19:29:58,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 19:29:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-04-06 19:29:58,406 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-04-06 19:29:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:58,406 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-04-06 19:29:58,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-04-06 19:29:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 19:29:58,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:58,411 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 19:29:58,411 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 19:29:58,412 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2022-04-06 19:29:58,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1693113002] [2022-04-06 19:29:58,413 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:58,414 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 2 times [2022-04-06 19:29:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:58,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490242893] [2022-04-06 19:29:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:58,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490242893] [2022-04-06 19:29:58,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490242893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005648780] [2022-04-06 19:29:58,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:58,528 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 19:29:58,529 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 19:29:58,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:58,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:58,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:29:58,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:58,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:29:58,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005648780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:58,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:58,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2022-04-06 19:29:58,708 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:58,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1693113002] [2022-04-06 19:29:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1693113002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:58,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:58,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:29:58,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616224881] [2022-04-06 19:29:58,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:58,709 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:29:58,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:58,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:29:58,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:29:58,710 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:58,856 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-04-06 19:29:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:29:58,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 19:29:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:58,860 INFO L225 Difference]: With dead ends: 130 [2022-04-06 19:29:58,860 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 19:29:58,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:29:58,862 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:58,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:29:58,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 19:29:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-04-06 19:29:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-04-06 19:29:58,892 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2022-04-06 19:29:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:58,892 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-04-06 19:29:58,893 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-04-06 19:29:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 19:29:58,897 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:58,897 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] [2022-04-06 19:29:58,925 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 19:29:59,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,112 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2022-04-06 19:29:59,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873159730] [2022-04-06 19:29:59,114 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,114 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:59,114 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 2 times [2022-04-06 19:29:59,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:59,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095313259] [2022-04-06 19:29:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:59,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:29:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:29:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:29:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:59,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:29:59,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095313259] [2022-04-06 19:29:59,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095313259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:29:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064059515] [2022-04-06 19:29:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:29:59,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:29:59,188 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 19:29:59,189 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 19:29:59,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:29:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:29:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:29:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:29:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:59,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:29:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:29:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064059515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:29:59,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:29:59,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 19:29:59,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:29:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873159730] [2022-04-06 19:29:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873159730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:29:59,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:29:59,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:29:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284677736] [2022-04-06 19:29:59,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:29:59,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:29:59,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:29:59,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:29:59,426 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:29:59,702 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2022-04-06 19:29:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:29:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 19:29:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:29:59,704 INFO L225 Difference]: With dead ends: 178 [2022-04-06 19:29:59,705 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 19:29:59,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:29:59,707 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:29:59,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:29:59,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 19:29:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2022-04-06 19:29:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:29:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-04-06 19:29:59,738 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2022-04-06 19:29:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:29:59,738 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-04-06 19:29:59,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:29:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-04-06 19:29:59,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:29:59,741 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:29:59,741 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, 1, 1, 1] [2022-04-06 19:29:59,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:29:59,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:29:59,955 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:29:59,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:29:59,956 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2022-04-06 19:29:59,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:29:59,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1090159735] [2022-04-06 19:29:59,958 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:29:59,958 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:29:59,958 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 2 times [2022-04-06 19:29:59,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:29:59,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950282031] [2022-04-06 19:29:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:29:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:00,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950282031] [2022-04-06 19:30:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950282031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:00,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177764694] [2022-04-06 19:30:00,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:00,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:00,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:00,317 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 19:30:00,319 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 19:30:00,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:00,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 19:30:00,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:00,439 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 79 treesize of output 77 [2022-04-06 19:30:00,511 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 19 treesize of output 18 [2022-04-06 19:30:00,661 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 19:30:00,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 37 treesize of output 35 [2022-04-06 19:30:00,845 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-04-06 19:30:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:00,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:03,024 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int)) (or (forall ((v_ArrVal_192 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_9)))) is different from false [2022-04-06 19:30:03,493 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int) (v_ArrVal_192 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_9)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|)))) is different from false [2022-04-06 19:30:04,122 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_9 Int) (v_ArrVal_192 Int) (v_ArrVal_191 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* c_main_~i~0 4) |c_main_~#distance~0.offset|) v_ArrVal_191))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_9 4) |c_main_~#distance~0.offset|) v_ArrVal_192) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_9)) (not (<= 0 v_ArrVal_191))))) is different from false [2022-04-06 19:30:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2022-04-06 19:30:04,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177764694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:04,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:04,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-04-06 19:30:04,209 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:04,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1090159735] [2022-04-06 19:30:04,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1090159735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:04,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:04,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:30:04,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663943660] [2022-04-06 19:30:04,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:04,210 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:30:04,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:04,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:30:04,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=556, Unknown=3, NotChecked=150, Total=812 [2022-04-06 19:30:04,211 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 19:30:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:04,876 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2022-04-06 19:30:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:30:04,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:30:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:04,878 INFO L225 Difference]: With dead ends: 177 [2022-04-06 19:30:04,878 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 19:30:04,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=297, Invalid=1194, Unknown=3, NotChecked=228, Total=1722 [2022-04-06 19:30:04,880 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 188 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:04,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 51 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 19:30:04,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2022-04-06 19:30:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-04-06 19:30:04,899 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2022-04-06 19:30:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:04,899 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-04-06 19:30:04,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 19:30:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-04-06 19:30:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:30:04,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:04,900 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 19:30:04,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:05,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:05,120 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 3 times [2022-04-06 19:30:05,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [553455975] [2022-04-06 19:30:05,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:05,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:05,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 4 times [2022-04-06 19:30:05,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:05,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252012447] [2022-04-06 19:30:05,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:05,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:05,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252012447] [2022-04-06 19:30:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252012447] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720501037] [2022-04-06 19:30:05,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:05,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:05,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:05,277 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 19:30:05,305 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 19:30:05,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:30:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:05,356 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 19:30:05,405 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:30:05,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 19:30:05,770 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-04-06 19:30:05,770 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 20 treesize of output 10 [2022-04-06 19:30:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:05,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:06,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720501037] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:06,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:06,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 35 [2022-04-06 19:30:06,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:06,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [553455975] [2022-04-06 19:30:06,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [553455975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:06,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:06,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:30:06,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369269043] [2022-04-06 19:30:06,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:06,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:30:06,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:30:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:30:06,231 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:06,685 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2022-04-06 19:30:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:30:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:30:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:06,687 INFO L225 Difference]: With dead ends: 218 [2022-04-06 19:30:06,687 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 19:30:06,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:30:06,689 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 150 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:06,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 62 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 19:30:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2022-04-06 19:30:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-04-06 19:30:06,721 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2022-04-06 19:30:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:06,721 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-04-06 19:30:06,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-04-06 19:30:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:30:06,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:06,723 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:06,751 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 19:30:06,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:06,940 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:06,940 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2022-04-06 19:30:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306889212] [2022-04-06 19:30:06,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:06,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 2 times [2022-04-06 19:30:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:06,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167860825] [2022-04-06 19:30:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 19:30:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:07,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:07,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167860825] [2022-04-06 19:30:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167860825] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153981235] [2022-04-06 19:30:07,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:07,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:07,025 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 19:30:07,036 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 19:30:07,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:07,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:30:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:07,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:07,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153981235] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:07,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 19:30:07,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306889212] [2022-04-06 19:30:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306889212] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:07,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110884349] [2022-04-06 19:30:07,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:07,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:30:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:30:07,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:30:07,280 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:07,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:07,518 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2022-04-06 19:30:07,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:30:07,518 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-04-06 19:30:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:07,520 INFO L225 Difference]: With dead ends: 254 [2022-04-06 19:30:07,520 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 19:30:07,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:30:07,521 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 152 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:07,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 48 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:07,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 19:30:07,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2022-04-06 19:30:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-04-06 19:30:07,548 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2022-04-06 19:30:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:07,549 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-04-06 19:30:07,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-04-06 19:30:07,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 19:30:07,550 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:07,550 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:07,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:30:07,767 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,767 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:07,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:07,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 3 times [2022-04-06 19:30:07,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:07,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2061474097] [2022-04-06 19:30:07,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:07,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 4 times [2022-04-06 19:30:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:07,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794976981] [2022-04-06 19:30:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:07,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:07,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794976981] [2022-04-06 19:30:07,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794976981] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:07,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549107869] [2022-04-06 19:30:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:07,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:07,859 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 19:30:07,887 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 19:30:07,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:07,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:07,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:30:07,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:08,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549107869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:08,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:08,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-04-06 19:30:08,091 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:08,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2061474097] [2022-04-06 19:30:08,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2061474097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:08,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:08,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:30:08,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271413679] [2022-04-06 19:30:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:08,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:30:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:30:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:30:08,093 INFO L87 Difference]: Start difference. First operand 131 states and 172 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 19:30:08,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:08,370 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-04-06 19:30:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:30:08,370 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 34 [2022-04-06 19:30:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:08,374 INFO L225 Difference]: With dead ends: 240 [2022-04-06 19:30:08,374 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 19:30:08,377 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:30:08,378 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:08,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 19:30:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2022-04-06 19:30:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-04-06 19:30:08,417 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2022-04-06 19:30:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:08,418 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-04-06 19:30:08,418 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 19:30:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-04-06 19:30:08,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 19:30:08,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:08,419 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 19:30:08,444 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 19:30:08,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:08,642 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 5 times [2022-04-06 19:30:08,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [269425910] [2022-04-06 19:30:08,643 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:08,643 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:08,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 6 times [2022-04-06 19:30:08,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:08,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625672040] [2022-04-06 19:30:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:08,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:08,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 19:30:08,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625672040] [2022-04-06 19:30:08,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625672040] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:08,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014765997] [2022-04-06 19:30:08,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:08,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:08,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:08,688 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 19:30:08,716 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 19:30:08,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-04-06 19:30:08,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:30:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 19:30:08,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:30:08,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014765997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:08,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:30:08,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-04-06 19:30:08,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [269425910] [2022-04-06 19:30:08,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [269425910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:08,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:08,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:30:08,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655860511] [2022-04-06 19:30:08,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:08,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:30:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:08,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:30:08,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:30:08,851 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 19:30:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:08,915 INFO L93 Difference]: Finished difference Result 292 states and 382 transitions. [2022-04-06 19:30:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:30:08,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 34 [2022-04-06 19:30:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:08,916 INFO L225 Difference]: With dead ends: 292 [2022-04-06 19:30:08,916 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 19:30:08,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 19:30:08,918 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:08,918 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:30:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 19:30:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2022-04-06 19:30:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.2846153846153847) internal successors, (167), 132 states have internal predecessors, (167), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:08,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-04-06 19:30:08,958 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 34 [2022-04-06 19:30:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:08,958 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-04-06 19:30:08,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 19:30:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-04-06 19:30:08,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 19:30:08,958 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:08,959 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-06 19:30:08,983 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 19:30:09,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 19:30:09,181 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 7 times [2022-04-06 19:30:09,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215213378] [2022-04-06 19:30:09,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:09,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:09,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 8 times [2022-04-06 19:30:09,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:09,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504960289] [2022-04-06 19:30:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:09,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:09,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504960289] [2022-04-06 19:30:09,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504960289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:09,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240015179] [2022-04-06 19:30:09,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:09,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:09,275 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 19:30:09,280 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 19:30:09,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:09,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:30:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:09,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240015179] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:09,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:09,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-04-06 19:30:09,532 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215213378] [2022-04-06 19:30:09,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215213378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:09,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:09,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:09,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857789471] [2022-04-06 19:30:09,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:09,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:09,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:09,533 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 19:30:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:09,967 INFO L93 Difference]: Finished difference Result 296 states and 374 transitions. [2022-04-06 19:30:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:30:09,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 34 [2022-04-06 19:30:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:09,968 INFO L225 Difference]: With dead ends: 296 [2022-04-06 19:30:09,968 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 19:30:09,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:30:09,969 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:09,970 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 97 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:09,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 19:30:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 154. [2022-04-06 19:30:10,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.289655172413793) internal successors, (187), 147 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 195 transitions. [2022-04-06 19:30:10,017 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 195 transitions. Word has length 34 [2022-04-06 19:30:10,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:10,017 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 195 transitions. [2022-04-06 19:30:10,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 19:30:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 195 transitions. [2022-04-06 19:30:10,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:30:10,018 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:10,018 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:10,046 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 19:30:10,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,231 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 5 times [2022-04-06 19:30:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:10,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1451062794] [2022-04-06 19:30:10,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:10,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:10,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 6 times [2022-04-06 19:30:10,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:10,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081607167] [2022-04-06 19:30:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:10,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:10,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081607167] [2022-04-06 19:30:10,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081607167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:10,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601524964] [2022-04-06 19:30:10,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:30:10,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:10,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:10,799 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 19:30:10,800 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 19:30:10,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 19:30:10,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 19:30:10,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:10,941 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 54 treesize of output 50 [2022-04-06 19:30:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-04-06 19:30:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 19:30:11,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:11,212 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 19:30:11,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 63 [2022-04-06 19:30:11,372 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-04-06 19:30:11,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 55 [2022-04-06 19:30:11,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2022-04-06 19:30:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:11,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:13,839 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_18 Int)) (or (forall ((v_ArrVal_434 Int)) (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|))) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-04-06 19:30:14,220 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_main_~x~0_18 Int)) (or (<= 0 (select (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)))) is different from false [2022-04-06 19:30:32,991 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~x~0_19 Int)) (or (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) |c_main_~#Dest~0.offset|)) v_main_~x~0_19)) (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ (* c_main_~j~0 4) 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18))))))) is different from false [2022-04-06 19:30:34,410 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (<= 0 (select (store .cse0 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (not (<= (select (select |c_#memory_int| |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19))))) is different from false [2022-04-06 19:30:36,540 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_434 Int) (v_ArrVal_431 Int) (v_main_~x~0_19 Int) (v_ArrVal_429 Int) (v_main_~x~0_18 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#distance~0.base|) (+ (* c_main_~i~0 4) |c_main_~#distance~0.offset|) v_ArrVal_429))) (let ((.cse1 (store .cse0 (+ |c_main_~#distance~0.offset| (* v_main_~x~0_19 4)) v_ArrVal_431))) (or (not (<= 0 v_ArrVal_429)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse0) |c_main_~#Dest~0.base|) |c_main_~#Dest~0.offset|) v_main_~x~0_19)) (not (<= (select (select (store |c_#memory_int| |c_main_~#distance~0.base| .cse1) |c_main_~#Dest~0.base|) (+ 4 |c_main_~#Dest~0.offset|)) v_main_~x~0_18)) (<= 0 (select (store .cse1 (+ (* v_main_~x~0_18 4) |c_main_~#distance~0.offset|) v_ArrVal_434) |c_main_~#distance~0.offset|)))))) is different from false [2022-04-06 19:30:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2022-04-06 19:30:36,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601524964] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:36,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:36,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 14] total 37 [2022-04-06 19:30:36,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:36,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1451062794] [2022-04-06 19:30:36,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1451062794] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:36,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:36,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:30:36,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641749123] [2022-04-06 19:30:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:36,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:30:36,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:30:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=850, Unknown=26, NotChecked=320, Total=1332 [2022-04-06 19:30:36,643 INFO L87 Difference]: Start difference. First operand 154 states and 195 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:37,309 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2022-04-06 19:30:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:30:37,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 19:30:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:37,311 INFO L225 Difference]: With dead ends: 187 [2022-04-06 19:30:37,311 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 19:30:37,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=276, Invalid=1610, Unknown=26, NotChecked=440, Total=2352 [2022-04-06 19:30:37,312 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 132 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:37,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 19:30:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2022-04-06 19:30:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2905405405405406) internal successors, (191), 150 states have internal predecessors, (191), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 199 transitions. [2022-04-06 19:30:37,347 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 199 transitions. Word has length 37 [2022-04-06 19:30:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:37,347 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 199 transitions. [2022-04-06 19:30:37,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:30:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 199 transitions. [2022-04-06 19:30:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:30:37,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:37,348 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:37,365 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 19:30:37,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:30:37,549 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2022-04-06 19:30:37,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:37,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137727203] [2022-04-06 19:30:37,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:37,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:37,551 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 2 times [2022-04-06 19:30:37,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:37,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935681558] [2022-04-06 19:30:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:37,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:30:37,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:37,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935681558] [2022-04-06 19:30:37,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935681558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:37,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:37,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:30:37,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137727203] [2022-04-06 19:30:37,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137727203] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:37,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:37,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:30:37,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707655539] [2022-04-06 19:30:37,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:37,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:30:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:30:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 19:30:37,627 INFO L87 Difference]: Start difference. First operand 157 states and 199 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 19:30:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:37,770 INFO L93 Difference]: Finished difference Result 247 states and 314 transitions. [2022-04-06 19:30:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:30:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 19:30:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:37,772 INFO L225 Difference]: With dead ends: 247 [2022-04-06 19:30:37,772 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 19:30:37,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:30:37,773 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:37,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:30:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 19:30:37,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 157. [2022-04-06 19:30:37,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 148 states have (on average 1.2702702702702702) internal successors, (188), 150 states have internal predecessors, (188), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 196 transitions. [2022-04-06 19:30:37,810 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 196 transitions. Word has length 37 [2022-04-06 19:30:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:37,810 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 196 transitions. [2022-04-06 19:30:37,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 19:30:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2022-04-06 19:30:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:30:37,811 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:37,811 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:30:37,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-04-06 19:30:37,811 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 9 times [2022-04-06 19:30:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:37,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872875462] [2022-04-06 19:30:37,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:37,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 10 times [2022-04-06 19:30:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:37,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519979571] [2022-04-06 19:30:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 19:30:37,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519979571] [2022-04-06 19:30:37,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519979571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369173569] [2022-04-06 19:30:37,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:37,971 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 19:30:37,976 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 19:30:38,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:38,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:30:38,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:38,050 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 19:30:38,083 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:30:38,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 19:30:38,132 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-04-06 19:30:38,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 19:30:38,541 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-04-06 19:30:38,541 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 20 treesize of output 10 [2022-04-06 19:30:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:38,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:39,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369173569] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:39,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:39,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 40 [2022-04-06 19:30:39,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:39,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872875462] [2022-04-06 19:30:39,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872875462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:39,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:39,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:30:39,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782750639] [2022-04-06 19:30:39,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:39,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:30:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:30:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1316, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:30:39,118 INFO L87 Difference]: Start difference. First operand 157 states and 196 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 19:30:39,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:39,476 INFO L93 Difference]: Finished difference Result 237 states and 298 transitions. [2022-04-06 19:30:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:30:39,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 37 [2022-04-06 19:30:39,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:39,478 INFO L225 Difference]: With dead ends: 237 [2022-04-06 19:30:39,478 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 19:30:39,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1827, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:30:39,479 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 103 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:39,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 66 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:39,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 19:30:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 162. [2022-04-06 19:30:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2745098039215685) internal successors, (195), 155 states have internal predecessors, (195), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:30:39,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 203 transitions. [2022-04-06 19:30:39,520 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 203 transitions. Word has length 37 [2022-04-06 19:30:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:39,520 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 203 transitions. [2022-04-06 19:30:39,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 19:30:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 203 transitions. [2022-04-06 19:30:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:30:39,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:39,521 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:39,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 19:30:39,741 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,SelfDestructingSolverStorable14 [2022-04-06 19:30:39,741 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:39,741 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2022-04-06 19:30:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:39,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1966989877] [2022-04-06 19:30:39,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:39,743 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 2 times [2022-04-06 19:30:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63574391] [2022-04-06 19:30:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:39,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 19:30:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:39,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:39,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63574391] [2022-04-06 19:30:39,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63574391] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:39,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127431922] [2022-04-06 19:30:39,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:39,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:39,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:39,916 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 19:30:39,946 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 19:30:40,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 19:30:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:40,068 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 19:30:42,199 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 19 treesize of output 7 [2022-04-06 19:30:42,230 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 19:30:42,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:44,337 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 14 [2022-04-06 19:30:44,340 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 32 treesize of output 28 [2022-04-06 19:30:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 19:30:44,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127431922] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:44,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:44,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 28 [2022-04-06 19:30:44,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:44,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1966989877] [2022-04-06 19:30:44,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1966989877] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:44,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:44,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:30:44,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117992167] [2022-04-06 19:30:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:44,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:30:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:30:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=654, Unknown=2, NotChecked=0, Total=756 [2022-04-06 19:30:44,435 INFO L87 Difference]: Start difference. First operand 162 states and 203 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:44,947 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2022-04-06 19:30:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:30:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-04-06 19:30:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:44,949 INFO L225 Difference]: With dead ends: 232 [2022-04-06 19:30:44,949 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 19:30:44,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=231, Invalid=1249, Unknown=2, NotChecked=0, Total=1482 [2022-04-06 19:30:44,950 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 200 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:44,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 75 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:30:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 19:30:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 170. [2022-04-06 19:30:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 161 states have internal predecessors, (201), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:30:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2022-04-06 19:30:44,992 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 39 [2022-04-06 19:30:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:44,992 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2022-04-06 19:30:44,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 19:30:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2022-04-06 19:30:44,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 19:30:44,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:44,993 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 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 19:30:45,011 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 19:30:45,200 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,SelfDestructingSolverStorable15 [2022-04-06 19:30:45,200 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:45,200 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 7 times [2022-04-06 19:30:45,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:45,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717466106] [2022-04-06 19:30:45,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:45,201 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 8 times [2022-04-06 19:30:45,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:45,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689375376] [2022-04-06 19:30:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:45,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:45,277 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:45,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:45,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689375376] [2022-04-06 19:30:45,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689375376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:45,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453427766] [2022-04-06 19:30:45,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:30:45,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:45,279 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 19:30:45,280 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 19:30:45,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:30:45,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:30:45,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:45,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:30:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:30:45,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453427766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:30:45,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:30:45,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-04-06 19:30:45,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:30:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717466106] [2022-04-06 19:30:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717466106] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:30:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:30:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:30:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919441029] [2022-04-06 19:30:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:30:45,560 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:30:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:30:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:30:45,560 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:30:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:30:46,001 INFO L93 Difference]: Finished difference Result 366 states and 463 transitions. [2022-04-06 19:30:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:30:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 40 [2022-04-06 19:30:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:30:46,003 INFO L225 Difference]: With dead ends: 366 [2022-04-06 19:30:46,003 INFO L226 Difference]: Without dead ends: 337 [2022-04-06 19:30:46,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:30:46,004 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:30:46,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 83 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:30:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-04-06 19:30:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 227. [2022-04-06 19:30:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 216 states have (on average 1.2962962962962963) internal successors, (280), 218 states have internal predecessors, (280), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:30:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 290 transitions. [2022-04-06 19:30:46,084 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 290 transitions. Word has length 40 [2022-04-06 19:30:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:30:46,085 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 290 transitions. [2022-04-06 19:30:46,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:30:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 290 transitions. [2022-04-06 19:30:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 19:30:46,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:30:46,087 INFO L499 BasicCegarLoop]: trace histogram [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 19:30:46,105 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 19:30:46,295 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,SelfDestructingSolverStorable16 [2022-04-06 19:30:46,295 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:30:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:30:46,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 3 times [2022-04-06 19:30:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:30:46,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1239308924] [2022-04-06 19:30:46,297 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:30:46,297 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:30:46,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 4 times [2022-04-06 19:30:46,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:30:46,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393976450] [2022-04-06 19:30:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:30:46,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:30:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:46,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:30:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:30:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 19:30:46,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:30:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393976450] [2022-04-06 19:30:46,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393976450] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:30:46,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897559896] [2022-04-06 19:30:46,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:30:46,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:30:46,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:30:46,775 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 19:30:46,775 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 19:30:46,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:30:46,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:30:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 19:30:46,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:30:46,893 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 84 treesize of output 76 [2022-04-06 19:30:46,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 19:30:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 19:30:47,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-04-06 19:30:47,332 INFO L356 Elim1Store]: treesize reduction 22, result has 50.0 percent of original size [2022-04-06 19:30:47,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 47 [2022-04-06 19:30:48,002 INFO L356 Elim1Store]: treesize reduction 122, result has 40.5 percent of original size [2022-04-06 19:30:48,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 97 treesize of output 142 [2022-04-06 19:30:53,376 INFO L356 Elim1Store]: treesize reduction 23, result has 56.6 percent of original size [2022-04-06 19:30:53,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 64 [2022-04-06 19:30:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:30:53,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:22,962 WARN L232 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 33 DAG size of output: 22 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-04-06 19:31:22,963 INFO L356 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2022-04-06 19:31:23,070 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 656201695925 treesize of output 618134774101