/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/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:31:21,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:31:21,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:31:21,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:31:22,058 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 19:31:22,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:31:22,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:31:22,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:31:22,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:31:22,071 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:31:22,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:31:22,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:31:22,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:31:22,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:31:22,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:31:22,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:31:22,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:31:22,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:31:22,073 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:31:22,073 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:31:22,073 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:31:22,073 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:31:22,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:31:22,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:31:22,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:31:22,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:31:22,370 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:31:22,376 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:31:22,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2022-04-06 19:31:22,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec143a63/f1fc55e12e8040208edcf27b9ac05f99/FLAG6ad7e30ac [2022-04-06 19:31:22,908 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:31:22,908 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2022-04-06 19:31:22,913 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec143a63/f1fc55e12e8040208edcf27b9ac05f99/FLAG6ad7e30ac [2022-04-06 19:31:22,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec143a63/f1fc55e12e8040208edcf27b9ac05f99 [2022-04-06 19:31:22,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:31:22,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:31:22,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:31:22,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:31:22,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:31:22,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:31:22" (1/1) ... [2022-04-06 19:31:22,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167673ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:22, skipping insertion in model container [2022-04-06 19:31:22,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:31:22" (1/1) ... [2022-04-06 19:31:22,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:31:22,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:31:23,145 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/sum03-1.i[807,820] [2022-04-06 19:31:23,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:31:23,176 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:31:23,185 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/sum03-1.i[807,820] [2022-04-06 19:31:23,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:31:23,205 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:31:23,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23 WrapperNode [2022-04-06 19:31:23,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:31:23,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:31:23,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:31:23,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:31:23,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:31:23,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:31:23,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:31:23,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:31:23,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (1/1) ... [2022-04-06 19:31:23,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:31:23,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:23,281 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 19:31:23,292 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 19:31:23,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:31:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:31:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:31:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:31:23,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:31:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:31:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:31:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:31:23,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:31:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:31:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:31:23,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:31:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 19:31:23,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:31:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:31:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:31:23,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:31:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:31:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:31:23,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:31:23,402 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:31:23,404 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:31:23,562 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:31:23,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:31:23,567 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:31:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:31:23 BoogieIcfgContainer [2022-04-06 19:31:23,569 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:31:23,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:31:23,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:31:23,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:31:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:31:22" (1/3) ... [2022-04-06 19:31:23,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570d8b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:31:23, skipping insertion in model container [2022-04-06 19:31:23,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:31:23" (2/3) ... [2022-04-06 19:31:23,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570d8b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:31:23, skipping insertion in model container [2022-04-06 19:31:23,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:31:23" (3/3) ... [2022-04-06 19:31:23,576 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2022-04-06 19:31:23,581 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:31:23,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:31:23,617 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:31:23,623 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 19:31:23,624 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:31:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:31:23,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:23,647 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:23,647 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695220, now seen corresponding path program 1 times [2022-04-06 19:31:23,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:23,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424759484] [2022-04-06 19:31:23,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:31:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695220, now seen corresponding path program 2 times [2022-04-06 19:31:23,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:23,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948970252] [2022-04-06 19:31:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,176 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 19:31:24,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948970252] [2022-04-06 19:31:24,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948970252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:24,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:24,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:31:24,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:24,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424759484] [2022-04-06 19:31:24,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424759484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:24,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:24,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:31:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444009074] [2022-04-06 19:31:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:24,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:31:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:31:24,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:31:24,227 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:24,463 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-04-06 19:31:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:31:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:31:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:24,474 INFO L225 Difference]: With dead ends: 41 [2022-04-06 19:31:24,474 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 19:31:24,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:31:24,483 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:24,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:31:24,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 19:31:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-04-06 19:31:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 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 19:31:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 19:31:24,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2022-04-06 19:31:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:24,526 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 19:31:24,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:31:24,526 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 19:31:24,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:31:24,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:24,527 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:24,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:31:24,528 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:24,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1052577873, now seen corresponding path program 1 times [2022-04-06 19:31:24,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:24,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644617424] [2022-04-06 19:31:24,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:24,550 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1052577873, now seen corresponding path program 2 times [2022-04-06 19:31:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148703264] [2022-04-06 19:31:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:24,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148703264] [2022-04-06 19:31:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148703264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655494392] [2022-04-06 19:31:24,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:24,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:24,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:24,828 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 19:31:24,838 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 19:31:24,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:24,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:31:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:25,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:25,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655494392] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:25,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:25,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-04-06 19:31:25,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:25,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644617424] [2022-04-06 19:31:25,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644617424] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:25,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:25,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:31:25,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020955769] [2022-04-06 19:31:25,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:25,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:31:25,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:25,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:31:25,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:31:25,797 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 19:31:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:26,007 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-04-06 19:31:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:31:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 21 [2022-04-06 19:31:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:26,010 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:31:26,011 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 19:31:26,011 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:31:26,012 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:26,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 43 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:31:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 19:31:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-06 19:31:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-04-06 19:31:26,022 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2022-04-06 19:31:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:26,022 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-04-06 19:31:26,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 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 19:31:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-04-06 19:31:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:31:26,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:26,023 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:26,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 19:31:26,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:26,232 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:26,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1109836175, now seen corresponding path program 1 times [2022-04-06 19:31:26,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:26,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335136550] [2022-04-06 19:31:26,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:26,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1109836175, now seen corresponding path program 2 times [2022-04-06 19:31:26,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:26,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399212213] [2022-04-06 19:31:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:26,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:26,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399212213] [2022-04-06 19:31:26,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399212213] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:26,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288332730] [2022-04-06 19:31:26,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:26,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:26,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:26,302 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 19:31:26,337 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 19:31:26,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:31:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:31:26,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288332730] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:26,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:26,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 19:31:26,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335136550] [2022-04-06 19:31:26,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335136550] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:26,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:26,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:31:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791067335] [2022-04-06 19:31:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:26,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:31:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:26,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:31:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:31:26,486 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:31:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:26,563 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-04-06 19:31:26,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:31:26,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2022-04-06 19:31:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:26,565 INFO L225 Difference]: With dead ends: 41 [2022-04-06 19:31:26,566 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 19:31:26,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:31:26,577 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:26,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:31:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 19:31:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2022-04-06 19:31:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:31:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-06 19:31:26,599 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-06 19:31:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:26,600 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-06 19:31:26,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 19:31:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-06 19:31:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:31:26,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:26,602 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:26,629 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 19:31:26,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 19:31:26,824 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:26,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:26,824 INFO L85 PathProgramCache]: Analyzing trace with hash 723660460, now seen corresponding path program 3 times [2022-04-06 19:31:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:26,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54153627] [2022-04-06 19:31:26,827 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:26,827 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 723660460, now seen corresponding path program 4 times [2022-04-06 19:31:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382734662] [2022-04-06 19:31:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:26,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:31:26,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:26,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382734662] [2022-04-06 19:31:26,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382734662] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:26,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642880757] [2022-04-06 19:31:26,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:26,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:26,958 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 19:31:26,960 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 19:31:26,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:26,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:31:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:31:27,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:31:27,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642880757] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:27,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:27,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 11 [2022-04-06 19:31:27,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54153627] [2022-04-06 19:31:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54153627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:27,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:27,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:31:27,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425970165] [2022-04-06 19:31:27,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:27,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:31:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:31:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:31:27,216 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:27,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:27,295 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-04-06 19:31:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:31:27,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-04-06 19:31:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:27,296 INFO L225 Difference]: With dead ends: 45 [2022-04-06 19:31:27,296 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 19:31:27,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:31:27,297 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:27,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:31:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 19:31:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 19:31:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:31:27,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 19:31:27,311 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2022-04-06 19:31:27,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:27,311 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 19:31:27,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:31:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 19:31:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:31:27,313 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:27,313 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:27,339 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 19:31:27,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:27,528 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash -668913975, now seen corresponding path program 5 times [2022-04-06 19:31:27,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:27,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27316282] [2022-04-06 19:31:27,537 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:27,537 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash -668913975, now seen corresponding path program 6 times [2022-04-06 19:31:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190908412] [2022-04-06 19:31:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 19:31:27,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190908412] [2022-04-06 19:31:27,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190908412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:27,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160839594] [2022-04-06 19:31:27,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:27,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:27,709 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 19:31:27,711 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 19:31:27,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:31:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 19:31:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:31:28,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:29,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160839594] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:29,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:31:29,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 14 [2022-04-06 19:31:29,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:29,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27316282] [2022-04-06 19:31:29,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27316282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:29,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:29,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:31:29,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124545757] [2022-04-06 19:31:29,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:29,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:31:29,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:31:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:31:29,388 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:31:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:29,528 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-04-06 19:31:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:31:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-04-06 19:31:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:29,529 INFO L225 Difference]: With dead ends: 49 [2022-04-06 19:31:29,529 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 19:31:29,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:31:29,530 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:29,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 29 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:31:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 19:31:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-04-06 19:31:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:31:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-04-06 19:31:29,545 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 37 [2022-04-06 19:31:29,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:29,545 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-04-06 19:31:29,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 19:31:29,546 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-04-06 19:31:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:31:29,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:29,547 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:29,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 19:31:29,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:29,751 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash -505363994, now seen corresponding path program 7 times [2022-04-06 19:31:29,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:29,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [982515640] [2022-04-06 19:31:29,754 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:29,754 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash -505363994, now seen corresponding path program 8 times [2022-04-06 19:31:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:29,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050119044] [2022-04-06 19:31:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 19:31:29,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050119044] [2022-04-06 19:31:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050119044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341479272] [2022-04-06 19:31:29,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:29,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:29,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:29,897 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 19:31:29,898 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 19:31:29,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:29,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:31:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 19:31:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 19:31:30,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341479272] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:30,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:30,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:31:30,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:30,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [982515640] [2022-04-06 19:31:30,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [982515640] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:30,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:30,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:31:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570215648] [2022-04-06 19:31:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:30,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:31:30,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:31:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:31:30,196 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:31:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:30,348 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-04-06 19:31:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:31:30,348 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), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-04-06 19:31:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:30,349 INFO L225 Difference]: With dead ends: 53 [2022-04-06 19:31:30,349 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 19:31:30,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:31:30,350 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:30,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:31:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 19:31:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 19:31:30,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-04-06 19:31:30,365 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 45 [2022-04-06 19:31:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:30,365 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-04-06 19:31:30,365 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), 6 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 19:31:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-04-06 19:31:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:31:30,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:30,366 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:30,390 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 19:31:30,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:30,580 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash -736237565, now seen corresponding path program 9 times [2022-04-06 19:31:30,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:30,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637906683] [2022-04-06 19:31:30,583 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:30,583 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash -736237565, now seen corresponding path program 10 times [2022-04-06 19:31:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:30,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165696193] [2022-04-06 19:31:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:31:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 19:31:30,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165696193] [2022-04-06 19:31:30,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165696193] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:30,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085168038] [2022-04-06 19:31:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:30,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:30,752 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 19:31:30,761 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 19:31:30,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:30,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:30,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 19:31:30,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 19:31:30,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 19:31:31,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085168038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:31,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:31,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 19:31:31,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637906683] [2022-04-06 19:31:31,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637906683] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:31,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:31,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:31:31,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264613239] [2022-04-06 19:31:31,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:31,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:31:31,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:31:31,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:31:31,195 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:31:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:31,401 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-04-06 19:31:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:31:31,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-04-06 19:31:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:31,403 INFO L225 Difference]: With dead ends: 57 [2022-04-06 19:31:31,403 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 19:31:31,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:31:31,404 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:31,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:31:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 19:31:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 19:31:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:31:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-04-06 19:31:31,422 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 53 [2022-04-06 19:31:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:31,422 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-04-06 19:31:31,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 7 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 19:31:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-04-06 19:31:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:31:31,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:31,429 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:31,455 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 19:31:31,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:31,653 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash 764780832, now seen corresponding path program 11 times [2022-04-06 19:31:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:31,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649547150] [2022-04-06 19:31:31,656 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:31,656 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:31,656 INFO L85 PathProgramCache]: Analyzing trace with hash 764780832, now seen corresponding path program 12 times [2022-04-06 19:31:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:31,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248881618] [2022-04-06 19:31:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:31,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:31:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:31:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 19:31:31,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248881618] [2022-04-06 19:31:31,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248881618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:31,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561307797] [2022-04-06 19:31:31,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:31,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:31,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:31,806 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 19:31:31,808 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 19:31:32,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 19:31:32,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:32,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:31:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 30 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 19:31:33,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:33,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561307797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:33,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 19:31:33,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2022-04-06 19:31:33,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:33,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649547150] [2022-04-06 19:31:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649547150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:33,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:33,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:31:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534475741] [2022-04-06 19:31:33,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:33,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:31:33,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:31:33,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:31:33,694 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:33,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:33,972 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2022-04-06 19:31:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:31:33,972 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), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-04-06 19:31:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:33,973 INFO L225 Difference]: With dead ends: 61 [2022-04-06 19:31:33,973 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 19:31:33,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:31:33,974 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:33,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 50 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:31:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 19:31:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 19:31:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:31:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-04-06 19:31:33,999 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 61 [2022-04-06 19:31:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:33,999 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-04-06 19:31:34,000 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), 8 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 19:31:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-04-06 19:31:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:31:34,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:34,000 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:34,010 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 19:31:34,201 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:34,201 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1610935613, now seen corresponding path program 13 times [2022-04-06 19:31:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:34,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264008477] [2022-04-06 19:31:34,204 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:34,204 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1610935613, now seen corresponding path program 14 times [2022-04-06 19:31:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:34,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767320991] [2022-04-06 19:31:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:34,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:31:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:31:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 19:31:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:34,360 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 19:31:34,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767320991] [2022-04-06 19:31:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767320991] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467862575] [2022-04-06 19:31:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:31:34,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:34,362 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 19:31:34,379 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 19:31:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:31:34,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:31:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 19:31:34,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 98 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 19:31:34,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467862575] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:34,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:34,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 19:31:34,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:34,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264008477] [2022-04-06 19:31:34,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264008477] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:34,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:34,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:31:34,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736654504] [2022-04-06 19:31:34,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:34,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:31:34,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:34,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:31:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:31:34,887 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:31:35,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:35,164 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-04-06 19:31:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:31:35,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-04-06 19:31:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:35,165 INFO L225 Difference]: With dead ends: 65 [2022-04-06 19:31:35,165 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 19:31:35,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:31:35,166 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:35,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:31:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 19:31:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 19:31:35,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:31:35,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-04-06 19:31:35,183 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 69 [2022-04-06 19:31:35,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:35,183 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-04-06 19:31:35,184 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 9 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 19:31:35,184 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-04-06 19:31:35,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:31:35,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:35,185 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:35,207 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 19:31:35,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 19:31:35,404 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash -802632614, now seen corresponding path program 15 times [2022-04-06 19:31:35,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:35,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013322676] [2022-04-06 19:31:35,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:35,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -802632614, now seen corresponding path program 16 times [2022-04-06 19:31:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108517250] [2022-04-06 19:31:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:35,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:35,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:31:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:31:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 19:31:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 19:31:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 19:31:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:35,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108517250] [2022-04-06 19:31:35,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108517250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571579352] [2022-04-06 19:31:35,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:31:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:35,638 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:31:35,644 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 19:31:35,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:31:35,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:35,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:31:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:35,937 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 19:31:35,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 19:31:36,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571579352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:36,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:36,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 19:31:36,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:36,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013322676] [2022-04-06 19:31:36,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013322676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:36,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:36,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:31:36,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119590490] [2022-04-06 19:31:36,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:36,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:31:36,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:36,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:31:36,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:31:36,177 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:31:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:36,491 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-04-06 19:31:36,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:31:36,493 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-04-06 19:31:36,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:36,494 INFO L225 Difference]: With dead ends: 69 [2022-04-06 19:31:36,494 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 19:31:36,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:31:36,496 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:36,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 59 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:31:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 19:31:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 19:31:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 19:31:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-04-06 19:31:36,514 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 77 [2022-04-06 19:31:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:36,514 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-04-06 19:31:36,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 10 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 19:31:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-04-06 19:31:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:31:36,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:36,515 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:36,539 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 19:31:36,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:31:36,739 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:36,740 INFO L85 PathProgramCache]: Analyzing trace with hash -708952457, now seen corresponding path program 17 times [2022-04-06 19:31:36,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:36,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236777901] [2022-04-06 19:31:36,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:36,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:36,742 INFO L85 PathProgramCache]: Analyzing trace with hash -708952457, now seen corresponding path program 18 times [2022-04-06 19:31:36,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:36,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812558824] [2022-04-06 19:31:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:36,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:31:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-04-06 19:31:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 19:31:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 19:31:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 19:31:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 19:31:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 19:31:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 19:31:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:36,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 19:31:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:37,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 19:31:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:31:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:31:37,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:31:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812558824] [2022-04-06 19:31:37,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812558824] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:31:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342977765] [2022-04-06 19:31:37,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:31:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:31:37,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:31:37,012 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 19:31:37,048 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 19:31:37,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 19:31:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:31:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:31:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:31:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:31:37,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:31:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 36 proven. 162 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 19:31:38,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342977765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:31:38,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:31:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 19:31:38,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:31:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236777901] [2022-04-06 19:31:38,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236777901] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:31:38,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:31:38,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:31:38,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266076319] [2022-04-06 19:31:38,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:31:38,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:31:38,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:31:38,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:31:38,241 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:31:38,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:31:38,607 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-04-06 19:31:38,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:31:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-04-06 19:31:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:31:38,609 INFO L225 Difference]: With dead ends: 73 [2022-04-06 19:31:38,609 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 19:31:38,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:31:38,610 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:31:38,611 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 41 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:31:38,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 19:31:38,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 19:31:38,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 19:31:38,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-04-06 19:31:38,627 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 85 [2022-04-06 19:31:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:31:38,628 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-04-06 19:31:38,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 11 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 19:31:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-04-06 19:31:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:31:38,629 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:31:38,629 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:31:38,637 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 19:31:38,833 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 19:31:38,834 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:31:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:31:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1149090924, now seen corresponding path program 19 times [2022-04-06 19:31:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:31:38,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185130258] [2022-04-06 19:31:38,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:31:38,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:31:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1149090924, now seen corresponding path program 20 times [2022-04-06 19:31:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:31:38,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216952847] [2022-04-06 19:31:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:31:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:31:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 19:31:38,926 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-06 19:31:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-06 19:31:39,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-06 19:31:39,011 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-06 19:31:39,011 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-06 19:31:39,014 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 19:31:39,016 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-04-06 19:31:39,019 INFO L719 BasicCegarLoop]: Path program histogram: [20, 2, 2] [2022-04-06 19:31:39,022 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 19:31:39,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:31:39 BoogieIcfgContainer [2022-04-06 19:31:39,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 19:31:39,041 INFO L158 Benchmark]: Toolchain (without parser) took 16101.86ms. Allocated memory was 173.0MB in the beginning and 213.9MB in the end (delta: 40.9MB). Free memory was 125.8MB in the beginning and 171.0MB in the end (delta: -45.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:31:39,042 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 173.0MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 19:31:39,042 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.15ms. Allocated memory is still 173.0MB. Free memory was 125.6MB in the beginning and 151.6MB in the end (delta: -26.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 19:31:39,042 INFO L158 Benchmark]: Boogie Preprocessor took 38.40ms. Allocated memory is still 173.0MB. Free memory was 151.6MB in the beginning and 150.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 19:31:39,042 INFO L158 Benchmark]: RCFGBuilder took 323.05ms. Allocated memory is still 173.0MB. Free memory was 150.0MB in the beginning and 140.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 19:31:39,042 INFO L158 Benchmark]: TraceAbstraction took 15470.71ms. Allocated memory was 173.0MB in the beginning and 213.9MB in the end (delta: 40.9MB). Free memory was 139.6MB in the beginning and 171.0MB in the end (delta: -31.4MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-04-06 19:31:39,044 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 173.0MB. Free memory is still 142.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 263.15ms. Allocated memory is still 173.0MB. Free memory was 125.6MB in the beginning and 151.6MB in the end (delta: -26.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.40ms. Allocated memory is still 173.0MB. Free memory was 151.6MB in the beginning and 150.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 323.05ms. Allocated memory is still 173.0MB. Free memory was 150.0MB in the beginning and 140.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 15470.71ms. Allocated memory was 173.0MB in the beginning and 213.9MB in the end (delta: 40.9MB). Free memory was 139.6MB in the beginning and 171.0MB in the end (delta: -31.4MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) [L24] COND TRUE 1 [L25] COND FALSE !(x<10) [L28] x++ [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.4s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 313 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 302 mSDsluCounter, 439 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 227 mSDsCounter, 231 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1713 IncrementalHoareTripleChecker+Invalid, 1944 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 231 mSolverCounterUnsat, 212 mSDtfsCounter, 1713 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1214 GetRequests, 967 SyntacticMatches, 10 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=11, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 19 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-04-06 19:31:39,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...