/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 00:30:28,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 00:30:28,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 00:30:28,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 00:30:28,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 00:30:28,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 00:30:28,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 00:30:28,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 00:30:28,955 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 00:30:28,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 00:30:28,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 00:30:28,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 00:30:28,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 00:30:28,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 00:30:28,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 00:30:28,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:30:28,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 00:30:28,958 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 00:30:29,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 00:30:29,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 00:30:29,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 00:30:29,166 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 00:30:29,167 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 00:30:29,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 00:30:29,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc84903/c3166c5d5fd045199f0f9baa3f730a17/FLAGb44ec7dec [2022-03-18 00:30:29,517 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 00:30:29,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2022-03-18 00:30:29,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc84903/c3166c5d5fd045199f0f9baa3f730a17/FLAGb44ec7dec [2022-03-18 00:30:29,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfc84903/c3166c5d5fd045199f0f9baa3f730a17 [2022-03-18 00:30:29,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 00:30:29,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 00:30:29,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 00:30:29,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 00:30:29,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 00:30:29,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:30:29" (1/1) ... [2022-03-18 00:30:29,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b77a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:29, skipping insertion in model container [2022-03-18 00:30:29,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 12:30:29" (1/1) ... [2022-03-18 00:30:29,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 00:30:29,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 00:30:30,097 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 00:30:30,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:30:30,142 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 00:30:30,151 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i[1009,1022] [2022-03-18 00:30:30,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 00:30:30,167 INFO L208 MainTranslator]: Completed translation [2022-03-18 00:30:30,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30 WrapperNode [2022-03-18 00:30:30,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 00:30:30,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 00:30:30,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 00:30:30,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 00:30:30,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 00:30:30,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 00:30:30,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 00:30:30,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 00:30:30,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (1/1) ... [2022-03-18 00:30:30,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 00:30:30,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:30,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 00:30:30,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 00:30:30,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 00:30:30,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 00:30:30,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 00:30:30,273 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 00:30:30,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 00:30:30,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 00:30:30,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 00:30:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 00:30:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 00:30:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 00:30:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-03-18 00:30:30,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 00:30:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 00:30:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 00:30:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 00:30:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 00:30:30,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 00:30:30,337 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 00:30:30,338 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 00:30:30,446 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 00:30:30,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 00:30:30,449 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 00:30:30,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:30:30 BoogieIcfgContainer [2022-03-18 00:30:30,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 00:30:30,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 00:30:30,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 00:30:30,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 00:30:30,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 12:30:29" (1/3) ... [2022-03-18 00:30:30,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56201ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:30:30, skipping insertion in model container [2022-03-18 00:30:30,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 12:30:30" (2/3) ... [2022-03-18 00:30:30,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56201ecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 12:30:30, skipping insertion in model container [2022-03-18 00:30:30,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 12:30:30" (3/3) ... [2022-03-18 00:30:30,455 INFO L111 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2022-03-18 00:30:30,458 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 00:30:30,459 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 00:30:30,500 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 00:30:30,504 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 00:30:30,504 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 00:30:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 00:30:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 00:30:30,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:30,516 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:30,518 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 1 times [2022-03-18 00:30:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:30,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952289056] [2022-03-18 00:30:30,541 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 00:30:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1868594418, now seen corresponding path program 2 times [2022-03-18 00:30:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088812161] [2022-03-18 00:30:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:30,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:30,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088812161] [2022-03-18 00:30:30,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088812161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:30,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:30,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:30:30,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:30,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952289056] [2022-03-18 00:30:30,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952289056] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:30,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:30,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 00:30:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134749038] [2022-03-18 00:30:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:30,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 00:30:30,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 00:30:30,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 00:30:30,775 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:30:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:30,863 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-03-18 00:30:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 00:30:30,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 00:30:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:30,870 INFO L225 Difference]: With dead ends: 48 [2022-03-18 00:30:30,870 INFO L226 Difference]: Without dead ends: 22 [2022-03-18 00:30:30,872 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-18 00:30:30,875 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:30,875 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 39 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 00:30:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-18 00:30:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-18 00:30:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 00:30:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-18 00:30:30,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-18 00:30:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:30,900 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-18 00:30:30,900 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:30:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-18 00:30:30,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-18 00:30:30,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:30,901 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:30,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 00:30:30,902 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 1 times [2022-03-18 00:30:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2000743309] [2022-03-18 00:30:30,925 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:30,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:30,925 INFO L85 PathProgramCache]: Analyzing trace with hash -426319892, now seen corresponding path program 2 times [2022-03-18 00:30:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:30,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126459971] [2022-03-18 00:30:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:30,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:31,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126459971] [2022-03-18 00:30:31,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126459971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:31,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524446258] [2022-03-18 00:30:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:31,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:31,151 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:31,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 00:30:31,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:31,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:31,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 00:30:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:31,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-18 00:30:31,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-18 00:30:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:31,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:31,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-03-18 00:30:31,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-03-18 00:30:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:31,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524446258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:31,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:31,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-18 00:30:31,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2000743309] [2022-03-18 00:30:31,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2000743309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:31,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:31,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:30:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973463584] [2022-03-18 00:30:31,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:31,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:30:31,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:30:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:30:31,524 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:30:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:31,696 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-03-18 00:30:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 00:30:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-18 00:30:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:31,697 INFO L225 Difference]: With dead ends: 32 [2022-03-18 00:30:31,697 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 00:30:31,698 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-18 00:30:31,699 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:31,699 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 00:30:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2022-03-18 00:30:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 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) [2022-03-18 00:30:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-03-18 00:30:31,706 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 16 [2022-03-18 00:30:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:31,706 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-03-18 00:30:31,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 00:30:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-03-18 00:30:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 00:30:31,707 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:31,707 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:31,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:31,922 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 1 times [2022-03-18 00:30:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:31,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1525332745] [2022-03-18 00:30:31,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:31,924 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1328899642, now seen corresponding path program 2 times [2022-03-18 00:30:31,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:31,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766974926] [2022-03-18 00:30:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:31,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 00:30:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:32,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766974926] [2022-03-18 00:30:32,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766974926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:32,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293664411] [2022-03-18 00:30:32,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:32,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:32,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:32,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:32,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 00:30:32,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:32,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 00:30:32,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:32,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:32,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293664411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:32,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:32,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-18 00:30:32,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:32,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1525332745] [2022-03-18 00:30:32,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1525332745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:32,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:32,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 00:30:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448010077] [2022-03-18 00:30:32,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:32,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 00:30:32,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 00:30:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 00:30:32,219 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-03-18 00:30:32,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:32,334 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-03-18 00:30:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 00:30:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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 24 [2022-03-18 00:30:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:32,336 INFO L225 Difference]: With dead ends: 46 [2022-03-18 00:30:32,336 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 00:30:32,337 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-03-18 00:30:32,337 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:32,338 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 00:30:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-18 00:30:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 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) [2022-03-18 00:30:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-03-18 00:30:32,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 24 [2022-03-18 00:30:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:32,344 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-03-18 00:30:32,344 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-03-18 00:30:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-03-18 00:30:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-18 00:30:32,344 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:32,344 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:32,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:32,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 00:30:32,561 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 3 times [2022-03-18 00:30:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:32,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223442161] [2022-03-18 00:30:32,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:32,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1936590556, now seen corresponding path program 4 times [2022-03-18 00:30:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264766085] [2022-03-18 00:30:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 00:30:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:32,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264766085] [2022-03-18 00:30:32,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264766085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:32,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251710656] [2022-03-18 00:30:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:32,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:32,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:32,717 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:32,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 00:30:32,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:32,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:30:32,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:32,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:33,174 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:33,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 00:30:33,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:33,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251710656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:33,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:33,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2022-03-18 00:30:33,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:33,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223442161] [2022-03-18 00:30:33,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223442161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:33,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:33,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:30:33,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115229365] [2022-03-18 00:30:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:33,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:30:33,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:33,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:30:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:30:33,319 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-03-18 00:30:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:33,532 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2022-03-18 00:30:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 00:30:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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 26 [2022-03-18 00:30:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:33,535 INFO L225 Difference]: With dead ends: 42 [2022-03-18 00:30:33,535 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 00:30:33,536 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 00:30:33,539 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:33,540 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 54 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 00:30:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-03-18 00:30:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:30:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-03-18 00:30:33,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 26 [2022-03-18 00:30:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:33,549 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-03-18 00:30:33,549 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-03-18 00:30:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-03-18 00:30:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-18 00:30:33,550 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:33,550 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:33,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:33,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:33,767 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:33,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 5 times [2022-03-18 00:30:33,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:33,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1190335687] [2022-03-18 00:30:33,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:33,769 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1234500350, now seen corresponding path program 6 times [2022-03-18 00:30:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:33,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137573513] [2022-03-18 00:30:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:33,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:33,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-03-18 00:30:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 00:30:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:30:33,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137573513] [2022-03-18 00:30:33,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137573513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:33,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476517800] [2022-03-18 00:30:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:33,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:33,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:33,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:33,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 00:30:33,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-18 00:30:33,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:33,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 00:30:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:30:34,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:30:34,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476517800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:34,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:34,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-03-18 00:30:34,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1190335687] [2022-03-18 00:30:34,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1190335687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:34,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:34,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 00:30:34,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653052604] [2022-03-18 00:30:34,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:34,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 00:30:34,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:34,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 00:30:34,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 00:30:34,174 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-03-18 00:30:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:34,317 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-03-18 00:30:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 00:30:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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 34 [2022-03-18 00:30:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:34,319 INFO L225 Difference]: With dead ends: 60 [2022-03-18 00:30:34,319 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 00:30:34,320 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-03-18 00:30:34,320 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:34,321 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 44 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 00:30:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-18 00:30:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 00:30:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-03-18 00:30:34,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-03-18 00:30:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:34,333 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-03-18 00:30:34,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-03-18 00:30:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-03-18 00:30:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 00:30:34,335 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:34,337 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:34,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:34,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:34,551 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:34,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:34,551 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 7 times [2022-03-18 00:30:34,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:34,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742810408] [2022-03-18 00:30:34,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:34,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -487899940, now seen corresponding path program 8 times [2022-03-18 00:30:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:34,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941379422] [2022-03-18 00:30:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:34,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:34,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 00:30:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 00:30:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:30:34,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941379422] [2022-03-18 00:30:34,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941379422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:34,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178357321] [2022-03-18 00:30:34,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:34,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:34,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:34,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 00:30:34,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:34,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:30:34,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:34,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:35,237 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:35,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:35,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 00:30:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:35,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178357321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:35,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:35,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2022-03-18 00:30:35,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742810408] [2022-03-18 00:30:35,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742810408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:35,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:35,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:30:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800520424] [2022-03-18 00:30:35,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:35,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:30:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:30:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-18 00:30:35,336 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-03-18 00:30:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:35,547 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-03-18 00:30:35,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 00:30:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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 36 [2022-03-18 00:30:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:35,548 INFO L225 Difference]: With dead ends: 52 [2022-03-18 00:30:35,548 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:30:35,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:30:35,549 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:35,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 65 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:30:35,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2022-03-18 00:30:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:30:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-03-18 00:30:35,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-03-18 00:30:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:35,560 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-03-18 00:30:35,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2022-03-18 00:30:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-03-18 00:30:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 00:30:35,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:35,562 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:35,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:35,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:35,779 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 9 times [2022-03-18 00:30:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:35,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2008851549] [2022-03-18 00:30:35,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:35,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:35,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1322580298, now seen corresponding path program 10 times [2022-03-18 00:30:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:35,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640872843] [2022-03-18 00:30:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:35,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-03-18 00:30:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 00:30:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 00:30:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:35,856 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:30:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:35,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640872843] [2022-03-18 00:30:35,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640872843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:35,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996352210] [2022-03-18 00:30:35,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:35,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:35,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:35,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:35,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 00:30:35,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:35,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 00:30:35,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:30:36,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:30:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996352210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:36,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:36,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-03-18 00:30:36,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2008851549] [2022-03-18 00:30:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2008851549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:36,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:36,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 00:30:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501453446] [2022-03-18 00:30:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:36,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 00:30:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 00:30:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-18 00:30:36,084 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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) [2022-03-18 00:30:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:36,269 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-03-18 00:30:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 00:30:36,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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 44 [2022-03-18 00:30:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:36,270 INFO L225 Difference]: With dead ends: 74 [2022-03-18 00:30:36,270 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 00:30:36,271 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:30:36,271 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:36,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 46 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 00:30:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-18 00:30:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 00:30:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-03-18 00:30:36,277 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-03-18 00:30:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:36,277 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-03-18 00:30:36,277 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 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) [2022-03-18 00:30:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-03-18 00:30:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 00:30:36,278 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:36,278 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:36,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:36,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:36,495 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 11 times [2022-03-18 00:30:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:36,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [962109240] [2022-03-18 00:30:36,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:36,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:36,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1186401044, now seen corresponding path program 12 times [2022-03-18 00:30:36,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:36,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571854423] [2022-03-18 00:30:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:36,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 00:30:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 00:30:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:30:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:30:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:36,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571854423] [2022-03-18 00:30:36,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571854423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:36,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391892878] [2022-03-18 00:30:36,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:36,692 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 00:30:36,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 00:30:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 00:30:36,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:36,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:37,451 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:37,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 00:30:37,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391892878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:37,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:37,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-03-18 00:30:37,587 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:37,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [962109240] [2022-03-18 00:30:37,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [962109240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:37,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:37,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:30:37,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095000506] [2022-03-18 00:30:37,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:37,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:30:37,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:30:37,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:30:37,589 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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) [2022-03-18 00:30:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:38,007 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2022-03-18 00:30:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 00:30:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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 46 [2022-03-18 00:30:38,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:38,008 INFO L225 Difference]: With dead ends: 62 [2022-03-18 00:30:38,008 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 00:30:38,009 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 00:30:38,009 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:38,010 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 80 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:30:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 00:30:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-18 00:30:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 00:30:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-18 00:30:38,015 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 46 [2022-03-18 00:30:38,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:38,016 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-18 00:30:38,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 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) [2022-03-18 00:30:38,016 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-18 00:30:38,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-18 00:30:38,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:38,016 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:38,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:38,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:38,234 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:38,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 13 times [2022-03-18 00:30:38,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:38,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393806374] [2022-03-18 00:30:38,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:38,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1707008786, now seen corresponding path program 14 times [2022-03-18 00:30:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623109368] [2022-03-18 00:30:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:38,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-03-18 00:30:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 00:30:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:30:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:30:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:30:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623109368] [2022-03-18 00:30:38,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623109368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:38,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363700993] [2022-03-18 00:30:38,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:38,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:38,384 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:38,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 00:30:38,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:38,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 00:30:38,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:30:38,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:30:38,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363700993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:38,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:38,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-03-18 00:30:38,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393806374] [2022-03-18 00:30:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393806374] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:38,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:38,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 00:30:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794854977] [2022-03-18 00:30:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:38,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 00:30:38,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:38,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 00:30:38,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-18 00:30:38,675 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-03-18 00:30:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:38,855 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-03-18 00:30:38,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 00:30:38,855 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 54 [2022-03-18 00:30:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:38,857 INFO L225 Difference]: With dead ends: 88 [2022-03-18 00:30:38,857 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 00:30:38,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-03-18 00:30:38,859 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:38,860 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 48 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 00:30:38,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 00:30:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 00:30:38,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-03-18 00:30:38,871 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-03-18 00:30:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:38,872 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-03-18 00:30:38,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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) [2022-03-18 00:30:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-03-18 00:30:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 00:30:38,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:38,873 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:38,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:39,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 00:30:39,091 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 15 times [2022-03-18 00:30:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:39,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1221620289] [2022-03-18 00:30:39,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:39,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:39,093 INFO L85 PathProgramCache]: Analyzing trace with hash -275659828, now seen corresponding path program 16 times [2022-03-18 00:30:39,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732401155] [2022-03-18 00:30:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:39,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:39,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 00:30:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 00:30:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:30:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:30:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:30:39,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732401155] [2022-03-18 00:30:39,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732401155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:39,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544469622] [2022-03-18 00:30:39,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:39,270 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:39,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 00:30:39,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:39,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:39,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:30:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:39,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:40,168 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:40,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 00:30:40,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:40,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544469622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:40,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:40,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 34 [2022-03-18 00:30:40,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1221620289] [2022-03-18 00:30:40,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1221620289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:40,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:40,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:30:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392514465] [2022-03-18 00:30:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:40,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:30:40,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:30:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:30:40,555 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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) [2022-03-18 00:30:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:41,108 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2022-03-18 00:30:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 00:30:41,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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 56 [2022-03-18 00:30:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:41,109 INFO L225 Difference]: With dead ends: 72 [2022-03-18 00:30:41,109 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 00:30:41,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=251, Invalid=2401, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:30:41,110 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:41,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 95 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:30:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 00:30:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-03-18 00:30:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 00:30:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-03-18 00:30:41,118 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 56 [2022-03-18 00:30:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:41,118 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-03-18 00:30:41,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 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) [2022-03-18 00:30:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-03-18 00:30:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 00:30:41,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:41,119 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:41,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:41,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 00:30:41,337 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:41,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 17 times [2022-03-18 00:30:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561033948] [2022-03-18 00:30:41,338 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:41,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1978425946, now seen corresponding path program 18 times [2022-03-18 00:30:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:41,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131484031] [2022-03-18 00:30:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:41,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-18 00:30:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 00:30:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:30:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:30:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:30:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 00:30:41,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131484031] [2022-03-18 00:30:41,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131484031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:41,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932084026] [2022-03-18 00:30:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:41,481 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:41,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 00:30:41,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-18 00:30:41,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:41,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 00:30:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 00:30:41,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 60 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 00:30:41,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932084026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:41,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:41,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-03-18 00:30:41,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:41,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561033948] [2022-03-18 00:30:41,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561033948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:41,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:41,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 00:30:41,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375000469] [2022-03-18 00:30:41,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:41,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 00:30:41,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 00:30:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2022-03-18 00:30:41,905 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-03-18 00:30:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:42,126 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-03-18 00:30:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 00:30:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 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 64 [2022-03-18 00:30:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:42,127 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:30:42,127 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 00:30:42,128 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 00:30:42,128 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:42,128 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 00:30:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-18 00:30:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 00:30:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-03-18 00:30:42,135 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-03-18 00:30:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:42,135 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-03-18 00:30:42,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 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) [2022-03-18 00:30:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-03-18 00:30:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 00:30:42,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:42,136 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:42,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:42,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 00:30:42,336 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:42,337 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 19 times [2022-03-18 00:30:42,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:42,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045709309] [2022-03-18 00:30:42,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:42,338 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:42,338 INFO L85 PathProgramCache]: Analyzing trace with hash -442513660, now seen corresponding path program 20 times [2022-03-18 00:30:42,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:42,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795557027] [2022-03-18 00:30:42,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:42,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 00:30:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 00:30:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:30:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:30:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:30:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 86 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 00:30:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795557027] [2022-03-18 00:30:42,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795557027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:42,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976198453] [2022-03-18 00:30:42,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:42,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:42,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:42,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:42,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 00:30:42,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:42,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:30:42,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:42,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:43,805 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:43,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 00:30:43,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:43,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976198453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:43,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:43,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2022-03-18 00:30:43,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:43,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045709309] [2022-03-18 00:30:43,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045709309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:43,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:43,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:30:43,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238428964] [2022-03-18 00:30:43,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:43,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:30:43,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:30:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 00:30:43,950 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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) [2022-03-18 00:30:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:44,512 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-03-18 00:30:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 00:30:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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 66 [2022-03-18 00:30:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:44,513 INFO L225 Difference]: With dead ends: 82 [2022-03-18 00:30:44,513 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 00:30:44,514 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=295, Invalid=3011, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 00:30:44,515 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:44,515 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:30:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 00:30:44,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-03-18 00:30:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 00:30:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-03-18 00:30:44,525 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 66 [2022-03-18 00:30:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:44,525 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-03-18 00:30:44,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 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) [2022-03-18 00:30:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-03-18 00:30:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-18 00:30:44,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:44,526 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:44,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:44,750 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 00:30:44,750 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:44,750 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 21 times [2022-03-18 00:30:44,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:44,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1291996413] [2022-03-18 00:30:44,751 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:44,751 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash -832116514, now seen corresponding path program 22 times [2022-03-18 00:30:44,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:44,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138342319] [2022-03-18 00:30:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:44,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-18 00:30:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 00:30:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:30:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:30:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:30:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:30:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 00:30:44,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138342319] [2022-03-18 00:30:44,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138342319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23797773] [2022-03-18 00:30:44,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:44,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:44,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:44,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 00:30:44,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 00:30:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 00:30:45,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 84 proven. 36 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 00:30:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23797773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:45,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:45,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-03-18 00:30:45,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1291996413] [2022-03-18 00:30:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1291996413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:45,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:45,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 00:30:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100374387] [2022-03-18 00:30:45,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:45,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 00:30:45,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:45,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 00:30:45,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-18 00:30:45,335 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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) [2022-03-18 00:30:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:45,590 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2022-03-18 00:30:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 00:30:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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 74 [2022-03-18 00:30:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:45,591 INFO L225 Difference]: With dead ends: 116 [2022-03-18 00:30:45,591 INFO L226 Difference]: Without dead ends: 80 [2022-03-18 00:30:45,592 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=1392, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:30:45,592 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 44 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:45,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-18 00:30:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-18 00:30:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 00:30:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-03-18 00:30:45,600 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-03-18 00:30:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:45,600 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-03-18 00:30:45,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 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) [2022-03-18 00:30:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-03-18 00:30:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 00:30:45,601 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:45,601 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:45,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:45,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 00:30:45,801 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 23 times [2022-03-18 00:30:45,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85278853] [2022-03-18 00:30:45,803 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:45,803 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:45,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2005759164, now seen corresponding path program 24 times [2022-03-18 00:30:45,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:45,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407296414] [2022-03-18 00:30:45,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 00:30:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 00:30:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:30:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:30:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:30:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:30:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 12 proven. 121 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 00:30:46,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407296414] [2022-03-18 00:30:46,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407296414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:46,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995425592] [2022-03-18 00:30:46,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:46,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:46,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:46,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 00:30:46,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 00:30:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:46,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:30:46,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:46,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:47,389 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:47,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 00:30:47,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995425592] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:47,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:47,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2022-03-18 00:30:47,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:47,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85278853] [2022-03-18 00:30:47,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85278853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:47,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:47,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:30:47,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146605467] [2022-03-18 00:30:47,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:47,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:30:47,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:30:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 00:30:47,522 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-03-18 00:30:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:48,103 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2022-03-18 00:30:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 00:30:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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 76 [2022-03-18 00:30:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:48,105 INFO L225 Difference]: With dead ends: 92 [2022-03-18 00:30:48,105 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 00:30:48,106 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 64 SyntacticMatches, 12 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 00:30:48,106 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 60 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:48,106 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 117 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:30:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 00:30:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-03-18 00:30:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 00:30:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-03-18 00:30:48,114 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 76 [2022-03-18 00:30:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:48,114 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-03-18 00:30:48,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 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) [2022-03-18 00:30:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-03-18 00:30:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-18 00:30:48,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:48,115 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:48,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 00:30:48,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 00:30:48,316 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:48,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:48,316 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 25 times [2022-03-18 00:30:48,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:48,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115975023] [2022-03-18 00:30:48,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:48,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:48,317 INFO L85 PathProgramCache]: Analyzing trace with hash -209232234, now seen corresponding path program 26 times [2022-03-18 00:30:48,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:48,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992514144] [2022-03-18 00:30:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:48,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 00:30:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 00:30:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:30:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:30:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:30:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:30:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 00:30:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 87 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:30:48,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:48,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992514144] [2022-03-18 00:30:48,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992514144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791546352] [2022-03-18 00:30:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:48,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:48,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:48,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:48,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 00:30:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:48,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 00:30:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:30:48,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 112 proven. 49 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:30:48,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791546352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:48,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:48,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-03-18 00:30:48,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115975023] [2022-03-18 00:30:48,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115975023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:48,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:48,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 00:30:48,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722085250] [2022-03-18 00:30:48,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:48,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 00:30:48,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:48,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 00:30:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2022-03-18 00:30:48,979 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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) [2022-03-18 00:30:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:49,275 INFO L93 Difference]: Finished difference Result 130 states and 139 transitions. [2022-03-18 00:30:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 00:30:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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 84 [2022-03-18 00:30:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:49,276 INFO L225 Difference]: With dead ends: 130 [2022-03-18 00:30:49,276 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 00:30:49,277 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 00:30:49,277 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:49,277 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 59 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:30:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 00:30:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-18 00:30:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 00:30:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-18 00:30:49,286 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-03-18 00:30:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:49,286 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-18 00:30:49,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 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) [2022-03-18 00:30:49,286 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-18 00:30:49,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 00:30:49,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:49,287 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:49,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:49,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:49,487 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:49,488 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 27 times [2022-03-18 00:30:49,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [942580550] [2022-03-18 00:30:49,489 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:49,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash 814689524, now seen corresponding path program 28 times [2022-03-18 00:30:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:49,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628739275] [2022-03-18 00:30:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 00:30:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:30:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:30:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:30:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:30:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:30:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:30:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 14 proven. 162 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:30:49,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628739275] [2022-03-18 00:30:49,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628739275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:49,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901118228] [2022-03-18 00:30:49,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:30:49,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:49,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:49,770 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:49,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 00:30:49,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:30:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 00:30:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:50,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:30:51,414 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:30:51,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:30:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 91 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 00:30:51,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:51,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901118228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:51,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:30:51,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-03-18 00:30:51,596 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:51,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [942580550] [2022-03-18 00:30:51,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [942580550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:51,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:51,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:30:51,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748770249] [2022-03-18 00:30:51,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:51,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:30:51,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:51,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:30:51,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2028, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:30:51,597 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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) [2022-03-18 00:30:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:52,456 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2022-03-18 00:30:52,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 00:30:52,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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 86 [2022-03-18 00:30:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:52,457 INFO L225 Difference]: With dead ends: 102 [2022-03-18 00:30:52,457 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 00:30:52,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 72 SyntacticMatches, 14 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=395, Invalid=4435, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 00:30:52,459 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 65 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:52,459 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 00:30:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 00:30:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2022-03-18 00:30:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 00:30:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-03-18 00:30:52,473 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2022-03-18 00:30:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:52,473 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-03-18 00:30:52,473 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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) [2022-03-18 00:30:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-03-18 00:30:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-18 00:30:52,474 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:52,474 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:52,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:52,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 00:30:52,676 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 29 times [2022-03-18 00:30:52,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:52,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958773865] [2022-03-18 00:30:52,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:52,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:52,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1169596722, now seen corresponding path program 30 times [2022-03-18 00:30:52,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:52,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297204611] [2022-03-18 00:30:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:52,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-03-18 00:30:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:30:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:30:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:30:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:30:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:30:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:30:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 00:30:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 115 proven. 93 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:30:52,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:52,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297204611] [2022-03-18 00:30:52,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297204611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:52,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600064235] [2022-03-18 00:30:52,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:30:52,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:52,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:52,879 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:52,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 00:30:52,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 00:30:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:52,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 00:30:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:30:53,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:30:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 144 proven. 64 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:30:53,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600064235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:30:53,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:30:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-03-18 00:30:53,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:30:53,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958773865] [2022-03-18 00:30:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958773865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:30:53,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:30:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 00:30:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415046686] [2022-03-18 00:30:53,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:30:53,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 00:30:53,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 00:30:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 00:30:53,435 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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) [2022-03-18 00:30:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:30:53,845 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-03-18 00:30:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 00:30:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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 94 [2022-03-18 00:30:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:30:53,847 INFO L225 Difference]: With dead ends: 144 [2022-03-18 00:30:53,847 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 00:30:53,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=490, Invalid=2162, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 00:30:53,851 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 48 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:30:53,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:30:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 00:30:53,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-18 00:30:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 00:30:53,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-03-18 00:30:53,866 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2022-03-18 00:30:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:30:53,867 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-03-18 00:30:53,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 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) [2022-03-18 00:30:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-03-18 00:30:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-18 00:30:53,868 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:30:53,868 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:30:53,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 00:30:54,084 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 00:30:54,085 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:30:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:30:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 31 times [2022-03-18 00:30:54,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:30:54,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153683387] [2022-03-18 00:30:54,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:30:54,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:30:54,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1315000236, now seen corresponding path program 32 times [2022-03-18 00:30:54,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:30:54,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759505484] [2022-03-18 00:30:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:30:54,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:30:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:30:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 00:30:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:30:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:30:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:30:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:30:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:30:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:30:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:30:54,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:30:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:30:54,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:30:54,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759505484] [2022-03-18 00:30:54,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759505484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:30:54,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101961972] [2022-03-18 00:30:54,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:30:54,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:30:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:30:54,373 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:30:54,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 00:30:54,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:30:54,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:30:54,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 00:30:54,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:30:54,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:32:32,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 00:32:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:32:32,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:34,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 00:32:34,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 00:32:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 16 proven. 209 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 00:32:34,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101961972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:34,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:34,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 38 [2022-03-18 00:32:34,900 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:34,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153683387] [2022-03-18 00:32:34,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153683387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:34,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:34,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:32:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534147884] [2022-03-18 00:32:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:34,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:32:34,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:32:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1291, Unknown=9, NotChecked=0, Total=1406 [2022-03-18 00:32:34,901 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2022-03-18 00:32:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:35,879 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2022-03-18 00:32:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 00:32:35,879 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 96 [2022-03-18 00:32:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:35,880 INFO L225 Difference]: With dead ends: 112 [2022-03-18 00:32:35,880 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 00:32:35,881 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 178 SyntacticMatches, 20 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 100.5s TimeCoverageRelationStatistics Valid=244, Invalid=3529, Unknown=9, NotChecked=0, Total=3782 [2022-03-18 00:32:35,882 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 70 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:35,882 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 135 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 00:32:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 00:32:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-03-18 00:32:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2022-03-18 00:32:35,899 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 96 [2022-03-18 00:32:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:35,899 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2022-03-18 00:32:35,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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) [2022-03-18 00:32:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2022-03-18 00:32:35,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 00:32:35,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:35,901 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:35,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:36,121 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 00:32:36,121 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:36,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 33 times [2022-03-18 00:32:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:36,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041307405] [2022-03-18 00:32:36,122 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:36,122 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1911993978, now seen corresponding path program 34 times [2022-03-18 00:32:36,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:36,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375729634] [2022-03-18 00:32:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:36,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-18 00:32:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:32:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:32:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:32:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:32:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:32:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:32:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:32:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 00:32:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 147 proven. 114 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:36,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:36,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375729634] [2022-03-18 00:32:36,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375729634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:36,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506121544] [2022-03-18 00:32:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:36,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:36,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:36,404 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:36,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 00:32:36,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:36,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 00:32:36,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:36,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:37,173 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 180 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:37,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506121544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:37,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:37,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-03-18 00:32:37,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041307405] [2022-03-18 00:32:37,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041307405] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:37,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:37,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 00:32:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056681124] [2022-03-18 00:32:37,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:37,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 00:32:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 00:32:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 00:32:37,175 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 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) [2022-03-18 00:32:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:37,611 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-03-18 00:32:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 00:32:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 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 104 [2022-03-18 00:32:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:37,612 INFO L225 Difference]: With dead ends: 158 [2022-03-18 00:32:37,613 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 00:32:37,615 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=582, Invalid=2610, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:32:37,615 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:37,616 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 78 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 00:32:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-18 00:32:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-03-18 00:32:37,627 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-03-18 00:32:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:37,627 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-03-18 00:32:37,627 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 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) [2022-03-18 00:32:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-03-18 00:32:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-18 00:32:37,628 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:37,628 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:37,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:37,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:37,844 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 35 times [2022-03-18 00:32:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:37,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004726030] [2022-03-18 00:32:37,845 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:37,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1220002588, now seen corresponding path program 36 times [2022-03-18 00:32:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499053564] [2022-03-18 00:32:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 00:32:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:32:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:32:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:32:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:32:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 00:32:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 00:32:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 00:32:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-18 00:32:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 18 proven. 262 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499053564] [2022-03-18 00:32:38,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499053564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982332033] [2022-03-18 00:32:38,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:38,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:38,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:38,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:38,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 00:32:38,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-18 00:32:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 00:32:38,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:38,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:32:40,789 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:32:40,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:32:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 153 proven. 127 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:40,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982332033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:41,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:32:41,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2022-03-18 00:32:41,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:41,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004726030] [2022-03-18 00:32:41,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004726030] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:41,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:41,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:32:41,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347610530] [2022-03-18 00:32:41,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:41,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:32:41,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:41,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:32:41,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2777, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 00:32:41,003 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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) [2022-03-18 00:32:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:42,224 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2022-03-18 00:32:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 00:32:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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 106 [2022-03-18 00:32:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:42,225 INFO L225 Difference]: With dead ends: 122 [2022-03-18 00:32:42,225 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 00:32:42,227 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 88 SyntacticMatches, 18 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=511, Invalid=6131, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:32:42,227 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 75 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:42,228 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 146 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 00:32:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 00:32:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2022-03-18 00:32:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.021978021978022) internal successors, (93), 92 states have internal predecessors, (93), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:32:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-03-18 00:32:42,250 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 106 [2022-03-18 00:32:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:42,250 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-03-18 00:32:42,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 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) [2022-03-18 00:32:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-03-18 00:32:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-18 00:32:42,252 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:42,252 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:42,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:42,455 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:42,456 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:42,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 37 times [2022-03-18 00:32:42,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:42,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082556523] [2022-03-18 00:32:42,457 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:42,457 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2058059454, now seen corresponding path program 38 times [2022-03-18 00:32:42,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163777399] [2022-03-18 00:32:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:42,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-03-18 00:32:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:32:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:32:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:32:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:32:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 00:32:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 00:32:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 00:32:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-18 00:32:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-18 00:32:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 183 proven. 137 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 00:32:42,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163777399] [2022-03-18 00:32:42,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163777399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:42,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661516356] [2022-03-18 00:32:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:42,698 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:42,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 00:32:42,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:42,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 00:32:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 00:32:43,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 220 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 00:32:43,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661516356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:43,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:43,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 39 [2022-03-18 00:32:43,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:43,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082556523] [2022-03-18 00:32:43,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082556523] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:43,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:43,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 00:32:43,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175558372] [2022-03-18 00:32:43,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:43,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 00:32:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 00:32:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 00:32:43,375 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:43,700 INFO L93 Difference]: Finished difference Result 172 states and 184 transitions. [2022-03-18 00:32:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 00:32:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 114 [2022-03-18 00:32:43,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:43,704 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:32:43,704 INFO L226 Difference]: Without dead ends: 120 [2022-03-18 00:32:43,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=682, Invalid=3100, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 00:32:43,705 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:43,705 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 55 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 00:32:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-18 00:32:43,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-03-18 00:32:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.021505376344086) internal successors, (95), 94 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:32:43,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2022-03-18 00:32:43,733 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2022-03-18 00:32:43,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:43,734 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2022-03-18 00:32:43,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:43,734 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2022-03-18 00:32:43,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 00:32:43,734 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:43,734 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:43,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:43,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 00:32:43,951 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 39 times [2022-03-18 00:32:43,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:43,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [15320180] [2022-03-18 00:32:43,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:43,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1880118428, now seen corresponding path program 40 times [2022-03-18 00:32:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:43,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919802002] [2022-03-18 00:32:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:43,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 00:32:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:32:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:32:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:32:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:32:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 00:32:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 00:32:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 00:32:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 00:32:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-18 00:32:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 20 proven. 321 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 00:32:44,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:44,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919802002] [2022-03-18 00:32:44,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919802002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:44,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151955390] [2022-03-18 00:32:44,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:32:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:44,396 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:44,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 00:32:44,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:32:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 00:32:44,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:44,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:32:49,272 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:32:49,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:32:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 214 proven. 151 refuted. 12 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 00:32:49,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151955390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:49,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:32:49,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 59 [2022-03-18 00:32:49,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:49,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [15320180] [2022-03-18 00:32:49,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [15320180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:49,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:49,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:32:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068253122] [2022-03-18 00:32:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:49,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:32:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:32:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3284, Unknown=1, NotChecked=0, Total=3660 [2022-03-18 00:32:49,701 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:51,099 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2022-03-18 00:32:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 00:32:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 116 [2022-03-18 00:32:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:51,102 INFO L225 Difference]: With dead ends: 132 [2022-03-18 00:32:51,102 INFO L226 Difference]: Without dead ends: 130 [2022-03-18 00:32:51,102 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=619, Invalid=7212, Unknown=1, NotChecked=0, Total=7832 [2022-03-18 00:32:51,103 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 80 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:51,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 157 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 00:32:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-18 00:32:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2022-03-18 00:32:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 99 states have (on average 1.02020202020202) internal successors, (101), 100 states have internal predecessors, (101), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:32:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-03-18 00:32:51,116 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 116 [2022-03-18 00:32:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:51,116 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-03-18 00:32:51,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 12 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 00:32:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-03-18 00:32:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-18 00:32:51,117 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:51,117 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:51,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 00:32:51,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 00:32:51,331 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 41 times [2022-03-18 00:32:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673137969] [2022-03-18 00:32:51,333 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:51,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1566810506, now seen corresponding path program 42 times [2022-03-18 00:32:51,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:51,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125142942] [2022-03-18 00:32:51,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-18 00:32:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:32:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:32:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:32:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:32:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 00:32:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 00:32:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 00:32:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 00:32:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-18 00:32:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-18 00:32:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 223 proven. 162 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:32:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125142942] [2022-03-18 00:32:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125142942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402596432] [2022-03-18 00:32:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:32:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:51,563 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:51,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 00:32:51,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-18 00:32:51,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:51,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 00:32:51,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:32:52,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:32:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 264 proven. 121 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:32:52,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402596432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:32:52,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:32:52,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 42 [2022-03-18 00:32:52,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:32:52,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673137969] [2022-03-18 00:32:52,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673137969] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:32:52,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:32:52,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 00:32:52,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864722756] [2022-03-18 00:32:52,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:32:52,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 00:32:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 00:32:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1338, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 00:32:52,188 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:32:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:32:52,703 INFO L93 Difference]: Finished difference Result 186 states and 199 transitions. [2022-03-18 00:32:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 00:32:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 124 [2022-03-18 00:32:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:32:52,706 INFO L225 Difference]: With dead ends: 186 [2022-03-18 00:32:52,706 INFO L226 Difference]: Without dead ends: 130 [2022-03-18 00:32:52,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=790, Invalid=3632, Unknown=0, NotChecked=0, Total=4422 [2022-03-18 00:32:52,710 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:32:52,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 82 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:32:52,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-18 00:32:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-03-18 00:32:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:32:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-03-18 00:32:52,744 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-03-18 00:32:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:32:52,744 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-03-18 00:32:52,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:32:52,744 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-03-18 00:32:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-18 00:32:52,745 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:32:52,745 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:32:52,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 00:32:52,962 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:52,962 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:32:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:32:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 43 times [2022-03-18 00:32:52,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:32:52,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913227083] [2022-03-18 00:32:52,963 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:32:52,963 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:32:52,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1844578604, now seen corresponding path program 44 times [2022-03-18 00:32:52,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:32:52,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314299307] [2022-03-18 00:32:52,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:32:52,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:32:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:32:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:32:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:32:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:32:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:32:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:32:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:32:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 00:32:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 00:32:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 00:32:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 00:32:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-18 00:32:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:32:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:32:53,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:32:53,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314299307] [2022-03-18 00:32:53,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314299307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:32:53,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225974432] [2022-03-18 00:32:53,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:32:53,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:32:53,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:32:53,420 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:32:53,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 00:32:53,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:32:53,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:32:53,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 00:32:53,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:32:53,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:36:39,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 00:36:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:36:39,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:41,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 00:36:41,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 00:36:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 22 proven. 386 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 00:36:42,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225974432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:42,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:42,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 30] total 47 [2022-03-18 00:36:42,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:42,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913227083] [2022-03-18 00:36:42,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913227083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:42,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:42,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:36:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544284959] [2022-03-18 00:36:42,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:42,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:36:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:42,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:36:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2017, Unknown=12, NotChecked=0, Total=2162 [2022-03-18 00:36:42,066 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:36:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:43,477 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2022-03-18 00:36:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 00:36:43,477 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 126 [2022-03-18 00:36:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:43,478 INFO L225 Difference]: With dead ends: 142 [2022-03-18 00:36:43,478 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 00:36:43,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 235 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 228.7s TimeCoverageRelationStatistics Valid=304, Invalid=5536, Unknown=12, NotChecked=0, Total=5852 [2022-03-18 00:36:43,479 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2685 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:43,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 168 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2685 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 00:36:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 00:36:43,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2022-03-18 00:36:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 108 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:36:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-03-18 00:36:43,515 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2022-03-18 00:36:43,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:43,516 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-03-18 00:36:43,516 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 13 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 00:36:43,516 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-03-18 00:36:43,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 00:36:43,516 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:43,516 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:43,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:43,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:43,751 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 45 times [2022-03-18 00:36:43,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:43,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293055656] [2022-03-18 00:36:43,753 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:36:43,753 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:43,753 INFO L85 PathProgramCache]: Analyzing trace with hash 886065326, now seen corresponding path program 46 times [2022-03-18 00:36:43,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:43,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569059492] [2022-03-18 00:36:43,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:43,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-18 00:36:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:36:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:36:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:36:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:36:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:36:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 00:36:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 00:36:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 00:36:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 00:36:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-18 00:36:44,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-18 00:36:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 267 proven. 189 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 00:36:44,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569059492] [2022-03-18 00:36:44,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569059492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:44,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948988364] [2022-03-18 00:36:44,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:36:44,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:44,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:44,072 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:36:44,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 00:36:44,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:36:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 00:36:44,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 00:36:44,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 312 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 00:36:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948988364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:45,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 45 [2022-03-18 00:36:45,198 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293055656] [2022-03-18 00:36:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293055656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:45,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:45,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 00:36:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172300748] [2022-03-18 00:36:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:45,199 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 00:36:45,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 00:36:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 00:36:45,200 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:36:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:45,952 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2022-03-18 00:36:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 00:36:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 134 [2022-03-18 00:36:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:45,953 INFO L225 Difference]: With dead ends: 200 [2022-03-18 00:36:45,953 INFO L226 Difference]: Without dead ends: 140 [2022-03-18 00:36:45,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=4206, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:36:45,954 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:45,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 89 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:36:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-18 00:36:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-03-18 00:36:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.018348623853211) internal successors, (111), 110 states have internal predecessors, (111), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:36:45,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-03-18 00:36:45,976 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-03-18 00:36:45,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:45,976 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-03-18 00:36:45,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:36:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-03-18 00:36:45,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-18 00:36:45,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:45,977 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:45,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:46,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 00:36:46,188 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 47 times [2022-03-18 00:36:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [532150527] [2022-03-18 00:36:46,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:36:46,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:46,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1055030388, now seen corresponding path program 48 times [2022-03-18 00:36:46,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:46,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315060926] [2022-03-18 00:36:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:46,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:36:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:36:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:36:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:36:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:36:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:36:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:36:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 00:36:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-18 00:36:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-18 00:36:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-18 00:36:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-18 00:36:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 24 proven. 457 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 00:36:46,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315060926] [2022-03-18 00:36:46,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315060926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660957593] [2022-03-18 00:36:46,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:36:46,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:46,828 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:36:46,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 00:36:47,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-18 00:36:47,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:36:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:47,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:36:49,901 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:36:49,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:36:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 276 proven. 205 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 00:36:49,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:50,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660957593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:50,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:36:50,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 66 [2022-03-18 00:36:50,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [532150527] [2022-03-18 00:36:50,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [532150527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:50,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:50,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:36:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069683252] [2022-03-18 00:36:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:50,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:36:50,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:36:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4106, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 00:36:50,152 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:36:51,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:51,954 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2022-03-18 00:36:51,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 00:36:51,955 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 136 [2022-03-18 00:36:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:51,956 INFO L225 Difference]: With dead ends: 152 [2022-03-18 00:36:51,956 INFO L226 Difference]: Without dead ends: 150 [2022-03-18 00:36:51,957 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 112 SyntacticMatches, 24 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=727, Invalid=9173, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 00:36:51,957 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 90 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:51,957 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 151 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 00:36:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-18 00:36:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2022-03-18 00:36:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 115 states have (on average 1.017391304347826) internal successors, (117), 116 states have internal predecessors, (117), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:36:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-03-18 00:36:51,977 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 136 [2022-03-18 00:36:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:51,978 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-03-18 00:36:51,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 14 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 00:36:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-03-18 00:36:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 00:36:51,978 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:51,979 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:51,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:52,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 00:36:52,184 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 49 times [2022-03-18 00:36:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:52,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1184488574] [2022-03-18 00:36:52,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:36:52,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash -490496666, now seen corresponding path program 50 times [2022-03-18 00:36:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964237756] [2022-03-18 00:36:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-03-18 00:36:52,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:36:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:36:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:36:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:36:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:36:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:36:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 00:36:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-18 00:36:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-18 00:36:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-18 00:36:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-18 00:36:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-18 00:36:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 315 proven. 218 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 00:36:52,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964237756] [2022-03-18 00:36:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964237756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641104409] [2022-03-18 00:36:52,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:36:52,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:52,574 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:36:52,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 00:36:52,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:36:52,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 00:36:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 00:36:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:53,565 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 364 proven. 169 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 00:36:53,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641104409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:36:53,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:36:53,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 48 [2022-03-18 00:36:53,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:53,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1184488574] [2022-03-18 00:36:53,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1184488574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:53,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:53,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 00:36:53,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975804889] [2022-03-18 00:36:53,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:53,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 00:36:53,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:53,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 00:36:53,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1754, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 00:36:53,567 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:36:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:36:54,218 INFO L93 Difference]: Finished difference Result 214 states and 229 transitions. [2022-03-18 00:36:54,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 00:36:54,218 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 144 [2022-03-18 00:36:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:36:54,220 INFO L225 Difference]: With dead ends: 214 [2022-03-18 00:36:54,220 INFO L226 Difference]: Without dead ends: 150 [2022-03-18 00:36:54,221 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1030, Invalid=4822, Unknown=0, NotChecked=0, Total=5852 [2022-03-18 00:36:54,222 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 58 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:36:54,222 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 71 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:36:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-18 00:36:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-03-18 00:36:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:36:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-03-18 00:36:54,247 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-03-18 00:36:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:36:54,247 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-03-18 00:36:54,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 31 states have internal predecessors, (78), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:36:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-03-18 00:36:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-18 00:36:54,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:36:54,248 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:36:54,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 00:36:54,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 00:36:54,456 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:36:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:36:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 51 times [2022-03-18 00:36:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:54,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707025876] [2022-03-18 00:36:54,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:36:54,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:36:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash 564353732, now seen corresponding path program 52 times [2022-03-18 00:36:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:36:54,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142553795] [2022-03-18 00:36:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:36:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:36:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:36:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:36:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:36:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:36:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:36:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 00:36:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 00:36:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 00:36:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-18 00:36:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-18 00:36:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-18 00:36:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-18 00:36:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-18 00:36:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-18 00:36:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:36:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 26 proven. 534 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 00:36:55,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:36:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142553795] [2022-03-18 00:36:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142553795] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:55,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383698728] [2022-03-18 00:36:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:36:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:36:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:36:55,084 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:36:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 00:36:55,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:36:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:36:55,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 00:36:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:36:55,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:36:59,550 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:36:59,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:36:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 325 proven. 235 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-18 00:36:59,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:36:59,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383698728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:36:59,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:36:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37] total 70 [2022-03-18 00:36:59,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:36:59,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707025876] [2022-03-18 00:36:59,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707025876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:36:59,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:36:59,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:36:59,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318873376] [2022-03-18 00:36:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:36:59,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:36:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:36:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:36:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4623, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 00:36:59,803 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:37:01,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:01,846 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2022-03-18 00:37:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 00:37:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 146 [2022-03-18 00:37:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:01,848 INFO L225 Difference]: With dead ends: 162 [2022-03-18 00:37:01,848 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 00:37:01,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 120 SyntacticMatches, 26 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2490 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=791, Invalid=10339, Unknown=0, NotChecked=0, Total=11130 [2022-03-18 00:37:01,849 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 95 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 3466 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 3466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:01,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 186 Invalid, 3560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 3466 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 00:37:01,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 00:37:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-03-18 00:37:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 123 states have (on average 1.016260162601626) internal successors, (125), 124 states have internal predecessors, (125), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:37:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-03-18 00:37:01,870 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 146 [2022-03-18 00:37:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:01,870 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-03-18 00:37:01,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 15 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 00:37:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-03-18 00:37:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 00:37:01,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:01,871 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:01,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:02,077 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 00:37:02,078 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 53 times [2022-03-18 00:37:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012475911] [2022-03-18 00:37:02,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:37:02,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash -696599394, now seen corresponding path program 54 times [2022-03-18 00:37:02,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312513650] [2022-03-18 00:37:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:02,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:02,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-03-18 00:37:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:37:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:37:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:37:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 00:37:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 00:37:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 00:37:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-18 00:37:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-18 00:37:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-18 00:37:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-18 00:37:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-18 00:37:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-18 00:37:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-18 00:37:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 367 proven. 249 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:37:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312513650] [2022-03-18 00:37:02,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312513650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112128395] [2022-03-18 00:37:02,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:37:02,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:02,479 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:37:02,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 00:37:02,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-03-18 00:37:02,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 00:37:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:37:03,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:37:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 420 proven. 196 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:37:03,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112128395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:37:03,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:37:03,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 51 [2022-03-18 00:37:03,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:37:03,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2012475911] [2022-03-18 00:37:03,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2012475911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:37:03,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:37:03,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 00:37:03,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135030165] [2022-03-18 00:37:03,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:37:03,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 00:37:03,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:03,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 00:37:03,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=1983, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 00:37:03,705 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:37:04,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:37:04,457 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2022-03-18 00:37:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 00:37:04,458 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 154 [2022-03-18 00:37:04,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:37:04,459 INFO L225 Difference]: With dead ends: 228 [2022-03-18 00:37:04,459 INFO L226 Difference]: Without dead ends: 160 [2022-03-18 00:37:04,460 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1162, Invalid=5480, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 00:37:04,461 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:37:04,461 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:37:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-18 00:37:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-03-18 00:37:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.016) internal successors, (127), 126 states have internal predecessors, (127), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:37:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-03-18 00:37:04,487 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2022-03-18 00:37:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:37:04,487 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-03-18 00:37:04,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 33 states have internal predecessors, (83), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:37:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-03-18 00:37:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-18 00:37:04,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:37:04,488 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:37:04,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 00:37:04,690 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 00:37:04,690 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:37:04,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:37:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 55 times [2022-03-18 00:37:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:37:04,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1452213656] [2022-03-18 00:37:04,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:37:04,692 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:37:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash -829694852, now seen corresponding path program 56 times [2022-03-18 00:37:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:37:04,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029499114] [2022-03-18 00:37:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:37:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:37:04,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:37:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:37:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:37:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:37:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:37:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 00:37:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 00:37:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 00:37:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 00:37:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-18 00:37:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-18 00:37:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-18 00:37:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-18 00:37:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-18 00:37:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-18 00:37:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:37:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:37:05,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:37:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029499114] [2022-03-18 00:37:05,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029499114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:37:05,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801652565] [2022-03-18 00:37:05,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:37:05,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:37:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:37:05,269 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:37:05,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 00:37:05,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:37:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:37:05,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 00:37:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:37:05,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:43:03,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-18 00:43:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:43:03,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:05,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-03-18 00:43:05,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-03-18 00:43:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 28 proven. 617 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-18 00:43:05,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801652565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:05,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:05,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 36] total 56 [2022-03-18 00:43:05,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:05,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1452213656] [2022-03-18 00:43:05,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1452213656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:05,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:05,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:43:05,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634018576] [2022-03-18 00:43:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:05,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:43:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:43:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2905, Unknown=15, NotChecked=0, Total=3080 [2022-03-18 00:43:05,816 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:43:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:08,025 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2022-03-18 00:43:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 00:43:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 156 [2022-03-18 00:43:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:08,026 INFO L225 Difference]: With dead ends: 172 [2022-03-18 00:43:08,026 INFO L226 Difference]: Without dead ends: 170 [2022-03-18 00:43:08,028 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 292 SyntacticMatches, 32 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 360.8s TimeCoverageRelationStatistics Valid=364, Invalid=7993, Unknown=15, NotChecked=0, Total=8372 [2022-03-18 00:43:08,028 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 100 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 4040 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 4040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:08,028 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 201 Invalid, 4140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 4040 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 00:43:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-18 00:43:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-03-18 00:43:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 131 states have (on average 1.015267175572519) internal successors, (133), 132 states have internal predecessors, (133), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2022-03-18 00:43:08,069 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 156 [2022-03-18 00:43:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:08,069 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2022-03-18 00:43:08,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 16 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 00:43:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2022-03-18 00:43:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-18 00:43:08,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:08,072 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:08,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:08,288 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:08,288 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 57 times [2022-03-18 00:43:08,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:08,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142496291] [2022-03-18 00:43:08,289 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:08,289 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash 679609942, now seen corresponding path program 58 times [2022-03-18 00:43:08,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:08,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2898144] [2022-03-18 00:43:08,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:08,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-03-18 00:43:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-03-18 00:43:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-18 00:43:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-03-18 00:43:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-03-18 00:43:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-03-18 00:43:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-03-18 00:43:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-03-18 00:43:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-03-18 00:43:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-03-18 00:43:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-03-18 00:43:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-03-18 00:43:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-03-18 00:43:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-03-18 00:43:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-03-18 00:43:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 423 proven. 282 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:43:08,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2898144] [2022-03-18 00:43:08,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2898144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:08,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006698316] [2022-03-18 00:43:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:43:08,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:08,684 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:08,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 00:43:09,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:43:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 00:43:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:43:09,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 480 proven. 225 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:43:09,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006698316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:09,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:09,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-03-18 00:43:09,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:09,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142496291] [2022-03-18 00:43:09,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142496291] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:09,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:09,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 00:43:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625853186] [2022-03-18 00:43:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:09,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 00:43:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 00:43:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=2226, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 00:43:09,816 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:43:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:10,554 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2022-03-18 00:43:10,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 00:43:10,554 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 164 [2022-03-18 00:43:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:10,555 INFO L225 Difference]: With dead ends: 242 [2022-03-18 00:43:10,555 INFO L226 Difference]: Without dead ends: 170 [2022-03-18 00:43:10,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1302, Invalid=6180, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 00:43:10,556 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:10,556 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 115 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:43:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-18 00:43:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-03-18 00:43:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-03-18 00:43:10,582 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-03-18 00:43:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:10,583 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-03-18 00:43:10,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:43:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-03-18 00:43:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-03-18 00:43:10,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:10,584 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:10,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:10,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 00:43:10,801 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 59 times [2022-03-18 00:43:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606860840] [2022-03-18 00:43:10,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:10,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:10,802 INFO L85 PathProgramCache]: Analyzing trace with hash -817141580, now seen corresponding path program 60 times [2022-03-18 00:43:10,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:10,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775959325] [2022-03-18 00:43:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:43:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:43:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:43:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:43:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:43:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 00:43:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 00:43:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 00:43:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 00:43:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-18 00:43:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-18 00:43:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-18 00:43:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-18 00:43:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-18 00:43:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-18 00:43:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 30 proven. 706 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:43:11,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775959325] [2022-03-18 00:43:11,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775959325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:11,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461274538] [2022-03-18 00:43:11,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:43:11,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:11,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:11,351 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:11,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 00:43:11,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-18 00:43:11,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 00:43:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:12,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:43:15,680 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:43:15,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:43:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 435 proven. 301 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 00:43:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:16,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461274538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:16,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:43:16,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 78 [2022-03-18 00:43:16,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606860840] [2022-03-18 00:43:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606860840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:16,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:16,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:43:16,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937160097] [2022-03-18 00:43:16,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:16,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:43:16,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:43:16,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=5720, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 00:43:16,089 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:43:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:18,388 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2022-03-18 00:43:18,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 00:43:18,389 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 166 [2022-03-18 00:43:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:18,390 INFO L225 Difference]: With dead ends: 182 [2022-03-18 00:43:18,390 INFO L226 Difference]: Without dead ends: 180 [2022-03-18 00:43:18,392 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 136 SyntacticMatches, 30 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3091 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=955, Invalid=12851, Unknown=0, NotChecked=0, Total=13806 [2022-03-18 00:43:18,392 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 105 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4404 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 4404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:18,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 4404 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-18 00:43:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-18 00:43:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-03-18 00:43:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 139 states have (on average 1.014388489208633) internal successors, (141), 140 states have internal predecessors, (141), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:43:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-03-18 00:43:18,422 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 166 [2022-03-18 00:43:18,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:18,423 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-03-18 00:43:18,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 17 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 00:43:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-03-18 00:43:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-03-18 00:43:18,424 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:18,424 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:18,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:18,657 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:18,657 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:18,658 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 61 times [2022-03-18 00:43:18,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:18,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1424008222] [2022-03-18 00:43:18,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:18,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -705832306, now seen corresponding path program 62 times [2022-03-18 00:43:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636211897] [2022-03-18 00:43:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:18,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-18 00:43:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-03-18 00:43:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-03-18 00:43:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-03-18 00:43:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-03-18 00:43:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-03-18 00:43:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-03-18 00:43:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-03-18 00:43:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-03-18 00:43:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-03-18 00:43:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-03-18 00:43:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-03-18 00:43:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-03-18 00:43:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-03-18 00:43:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-03-18 00:43:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-03-18 00:43:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 483 proven. 317 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 00:43:19,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636211897] [2022-03-18 00:43:19,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636211897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:19,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930758632] [2022-03-18 00:43:19,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:43:19,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:19,207 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 00:43:19,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:43:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 00:43:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 00:43:19,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 544 proven. 256 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 00:43:20,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930758632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:20,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 57 [2022-03-18 00:43:20,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:20,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1424008222] [2022-03-18 00:43:20,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1424008222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:20,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 00:43:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267703620] [2022-03-18 00:43:20,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:20,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 00:43:20,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 00:43:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=2483, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 00:43:20,060 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:20,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:20,939 INFO L93 Difference]: Finished difference Result 256 states and 274 transitions. [2022-03-18 00:43:20,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 00:43:20,939 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 174 [2022-03-18 00:43:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:20,941 INFO L225 Difference]: With dead ends: 256 [2022-03-18 00:43:20,941 INFO L226 Difference]: Without dead ends: 180 [2022-03-18 00:43:20,942 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1450, Invalid=6922, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 00:43:20,942 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 64 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:20,943 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 00:43:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-18 00:43:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-03-18 00:43:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 142 states have internal predecessors, (143), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:43:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2022-03-18 00:43:20,971 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2022-03-18 00:43:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:20,971 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2022-03-18 00:43:20,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2022-03-18 00:43:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 00:43:20,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:20,972 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:20,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:21,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:21,187 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 63 times [2022-03-18 00:43:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:21,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1293253534] [2022-03-18 00:43:21,189 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:21,189 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1914806420, now seen corresponding path program 64 times [2022-03-18 00:43:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:21,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039896337] [2022-03-18 00:43:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:43:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:43:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:43:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:43:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:43:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:43:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 00:43:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-18 00:43:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-18 00:43:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-18 00:43:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-18 00:43:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-18 00:43:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-18 00:43:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-18 00:43:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-18 00:43:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-18 00:43:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 32 proven. 801 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 00:43:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039896337] [2022-03-18 00:43:21,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039896337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829036414] [2022-03-18 00:43:21,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 00:43:21,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:21,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:21,970 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:21,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 00:43:22,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 00:43:22,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 00:43:22,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:23,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-18 00:43:27,827 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-03-18 00:43:27,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-03-18 00:43:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 496 proven. 337 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 00:43:27,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:28,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829036414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:28,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 00:43:28,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43] total 82 [2022-03-18 00:43:28,027 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:28,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1293253534] [2022-03-18 00:43:28,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1293253534] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:28,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:28,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 00:43:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387544901] [2022-03-18 00:43:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:28,028 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 00:43:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 00:43:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=6312, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 00:43:28,029 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:30,011 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2022-03-18 00:43:30,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 00:43:30,011 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 176 [2022-03-18 00:43:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:30,012 INFO L225 Difference]: With dead ends: 192 [2022-03-18 00:43:30,012 INFO L226 Difference]: Without dead ends: 190 [2022-03-18 00:43:30,014 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 144 SyntacticMatches, 32 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3414 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1043, Invalid=14209, Unknown=0, NotChecked=0, Total=15252 [2022-03-18 00:43:30,014 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:30,015 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 223 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 00:43:30,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-18 00:43:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2022-03-18 00:43:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 148 states have internal predecessors, (149), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 00:43:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-03-18 00:43:30,057 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 176 [2022-03-18 00:43:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:30,058 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-03-18 00:43:30,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 18 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 00:43:30,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-03-18 00:43:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-18 00:43:30,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:30,058 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:30,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:30,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 00:43:30,275 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:30,276 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 65 times [2022-03-18 00:43:30,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458286041] [2022-03-18 00:43:30,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:30,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:30,277 INFO L85 PathProgramCache]: Analyzing trace with hash 911907142, now seen corresponding path program 66 times [2022-03-18 00:43:30,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:30,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841916082] [2022-03-18 00:43:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:30,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-03-18 00:43:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-03-18 00:43:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-03-18 00:43:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-03-18 00:43:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-03-18 00:43:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-03-18 00:43:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-03-18 00:43:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-03-18 00:43:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-03-18 00:43:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-03-18 00:43:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-03-18 00:43:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-03-18 00:43:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-03-18 00:43:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-03-18 00:43:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-03-18 00:43:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-03-18 00:43:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-03-18 00:43:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 547 proven. 354 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 00:43:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841916082] [2022-03-18 00:43:30,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841916082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043272953] [2022-03-18 00:43:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 00:43:30,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:30,796 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:30,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 00:43:31,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-03-18 00:43:31,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:31,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 00:43:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 00:43:32,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 00:43:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 612 proven. 289 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 00:43:32,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043272953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 00:43:32,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 00:43:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 60 [2022-03-18 00:43:32,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 00:43:32,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458286041] [2022-03-18 00:43:32,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458286041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 00:43:32,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 00:43:32,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 00:43:32,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730458499] [2022-03-18 00:43:32,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 00:43:32,721 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 00:43:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:32,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 00:43:32,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=2754, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 00:43:32,722 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:43:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 00:43:33,427 INFO L93 Difference]: Finished difference Result 270 states and 289 transitions. [2022-03-18 00:43:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 00:43:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 184 [2022-03-18 00:43:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 00:43:33,429 INFO L225 Difference]: With dead ends: 270 [2022-03-18 00:43:33,429 INFO L226 Difference]: Without dead ends: 190 [2022-03-18 00:43:33,430 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 383 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1606, Invalid=7706, Unknown=0, NotChecked=0, Total=9312 [2022-03-18 00:43:33,430 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 00:43:33,430 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 94 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 00:43:33,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-18 00:43:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-03-18 00:43:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 150 states have internal predecessors, (151), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 00:43:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-03-18 00:43:33,461 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-03-18 00:43:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 00:43:33,461 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-03-18 00:43:33,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 19 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 00:43:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-03-18 00:43:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-03-18 00:43:33,462 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 00:43:33,462 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 00:43:33,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 00:43:33,681 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 00:43:33,682 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 00:43:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 00:43:33,682 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 67 times [2022-03-18 00:43:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 00:43:33,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616503255] [2022-03-18 00:43:33,683 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-03-18 00:43:33,683 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-18 00:43:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash -859234140, now seen corresponding path program 68 times [2022-03-18 00:43:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 00:43:33,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938438546] [2022-03-18 00:43:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 00:43:33,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 00:43:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 00:43:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-18 00:43:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-03-18 00:43:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-03-18 00:43:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-03-18 00:43:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-03-18 00:43:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-03-18 00:43:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-03-18 00:43:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-03-18 00:43:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-03-18 00:43:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-03-18 00:43:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-03-18 00:43:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-03-18 00:43:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-03-18 00:43:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-03-18 00:43:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-03-18 00:43:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-03-18 00:43:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-03-18 00:43:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 00:43:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 34 proven. 902 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-18 00:43:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 00:43:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938438546] [2022-03-18 00:43:34,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938438546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 00:43:34,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175250764] [2022-03-18 00:43:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 00:43:34,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 00:43:34,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 00:43:34,538 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 00:43:34,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 00:43:34,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 00:43:34,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 00:43:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 00:43:34,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 00:43:34,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11