/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:28:31,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:28:31,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:28:31,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:28:31,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:28:31,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:28:31,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:28:31,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:28:31,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:28:31,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:28:31,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:28:31,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:28:31,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:28:31,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:28:31,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:28:31,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:28:31,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:28:31,171 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:28:31,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:28:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:28:31,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:28:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:28:31,394 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:28:31,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-04-06 20:28:31,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fd1afcc/f5589eea1a6c4281b373a268db491063/FLAG4f3061780 [2022-04-06 20:28:31,821 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:28:31,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-04-06 20:28:31,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fd1afcc/f5589eea1a6c4281b373a268db491063/FLAG4f3061780 [2022-04-06 20:28:31,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55fd1afcc/f5589eea1a6c4281b373a268db491063 [2022-04-06 20:28:31,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:28:31,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:28:31,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:28:31,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:28:31,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:28:31,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:28:31" (1/1) ... [2022-04-06 20:28:31,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da219eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:31, skipping insertion in model container [2022-04-06 20:28:31,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:28:31" (1/1) ... [2022-04-06 20:28:31,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:28:31,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:28:31,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-04-06 20:28:32,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:28:32,031 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:28:32,039 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c[311,324] [2022-04-06 20:28:32,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:28:32,050 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:28:32,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32 WrapperNode [2022-04-06 20:28:32,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:28:32,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:28:32,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:28:32,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:28:32,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:28:32,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:28:32,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:28:32,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:28:32,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (1/1) ... [2022-04-06 20:28:32,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:28:32,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:32,097 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:28:32,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:28:32,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:28:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:28:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:28:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:28:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:28:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:28:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:28:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:28:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:28:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:28:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:28:32,174 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:28:32,175 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:28:32,250 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:28:32,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:28:32,255 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:28:32,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:28:32 BoogieIcfgContainer [2022-04-06 20:28:32,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:28:32,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:28:32,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:28:32,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:28:32,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:28:31" (1/3) ... [2022-04-06 20:28:32,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5502f2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:28:32, skipping insertion in model container [2022-04-06 20:28:32,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:28:32" (2/3) ... [2022-04-06 20:28:32,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5502f2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:28:32, skipping insertion in model container [2022-04-06 20:28:32,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:28:32" (3/3) ... [2022-04-06 20:28:32,263 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-04-06 20:28:32,267 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:28:32,267 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:28:32,301 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:28:32,306 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:28:32,306 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:28:32,317 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:28:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:28:32,323 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:32,323 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:32,324 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:32,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-04-06 20:28:32,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [933395006] [2022-04-06 20:28:32,343 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:32,343 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 2 times [2022-04-06 20:28:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:32,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074094389] [2022-04-06 20:28:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:32,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:32,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074094389] [2022-04-06 20:28:32,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074094389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:28:32,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:32,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [933395006] [2022-04-06 20:28:32,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [933395006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:28:32,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877217835] [2022-04-06 20:28:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:32,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:28:32,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:28:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:28:32,621 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:32,685 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-06 20:28:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:28:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:28:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:32,698 INFO L225 Difference]: With dead ends: 33 [2022-04-06 20:28:32,698 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:28:32,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:28:32,708 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:32,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:32,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:28:32,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:28:32,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 20:28:32,749 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 20:28:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:32,749 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 20:28:32,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 20:28:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:28:32,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:32,751 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:32,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:28:32,751 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-04-06 20:28:32,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1886623917] [2022-04-06 20:28:32,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:28:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 2 times [2022-04-06 20:28:32,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:32,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127285387] [2022-04-06 20:28:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:32,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:32,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:32,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127285387] [2022-04-06 20:28:32,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127285387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:28:32,934 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:32,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1886623917] [2022-04-06 20:28:32,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1886623917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:32,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:32,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:28:32,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619309511] [2022-04-06 20:28:32,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:32,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:28:32,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:32,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:28:32,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:28:32,937 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:32,992 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-06 20:28:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:28:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:28:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:32,994 INFO L225 Difference]: With dead ends: 25 [2022-04-06 20:28:32,994 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:28:32,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:28:32,998 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:32,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:33,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:28:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-06 20:28:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-06 20:28:33,019 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-04-06 20:28:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:33,020 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-06 20:28:33,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-06 20:28:33,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:28:33,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:33,021 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:33,021 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:28:33,021 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:33,022 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-04-06 20:28:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1533315884] [2022-04-06 20:28:33,041 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:33,041 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 2 times [2022-04-06 20:28:33,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:33,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405643132] [2022-04-06 20:28:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405643132] [2022-04-06 20:28:33,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405643132] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:33,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823145922] [2022-04-06 20:28:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:33,167 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:33,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:28:33,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 20:28:33,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:28:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:28:33,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:28:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823145922] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:28:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2022-04-06 20:28:33,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1533315884] [2022-04-06 20:28:33,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1533315884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:33,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:33,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:28:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182929963] [2022-04-06 20:28:33,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:33,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:28:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:28:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:28:33,332 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:33,374 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-04-06 20:28:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:28:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:28:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:33,376 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:28:33,376 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:28:33,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:28:33,377 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:33,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:33,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:28:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 20:28:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 20:28:33,383 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-04-06 20:28:33,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:33,383 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 20:28:33,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 20:28:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:28:33,384 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:33,384 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:33,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:33,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:33,600 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2022-04-06 20:28:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:33,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446446412] [2022-04-06 20:28:33,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:33,607 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:33,607 INFO L85 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 2 times [2022-04-06 20:28:33,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637045797] [2022-04-06 20:28:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:33,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:33,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637045797] [2022-04-06 20:28:33,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637045797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560863988] [2022-04-06 20:28:33,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:33,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:33,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:33,718 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:33,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:28:33,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:28:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:33,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:33,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560863988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:33,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:33,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 6] total 13 [2022-04-06 20:28:33,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:33,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446446412] [2022-04-06 20:28:33,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446446412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:33,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:33,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:28:33,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230805936] [2022-04-06 20:28:33,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:33,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:28:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:33,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:28:33,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:28:33,989 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:34,047 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:28:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:28:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:28:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:34,049 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:28:34,049 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:28:34,050 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:28:34,054 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:34,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:28:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:28:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-06 20:28:34,067 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-04-06 20:28:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:34,067 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-06 20:28:34,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-06 20:28:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:28:34,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:34,068 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:34,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-06 20:28:34,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 20:28:34,283 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:34,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1077515338, now seen corresponding path program 3 times [2022-04-06 20:28:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:34,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313696040] [2022-04-06 20:28:34,286 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:34,286 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:34,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1077515338, now seen corresponding path program 4 times [2022-04-06 20:28:34,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:34,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913239631] [2022-04-06 20:28:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913239631] [2022-04-06 20:28:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913239631] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227140886] [2022-04-06 20:28:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:34,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:34,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:34,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:28:34,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:28:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:34,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227140886] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:34,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:34,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-04-06 20:28:34,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313696040] [2022-04-06 20:28:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313696040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:28:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295303458] [2022-04-06 20:28:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:34,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:28:34,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:34,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:28:34,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:28:34,719 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:34,783 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 20:28:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:28:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-04-06 20:28:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:34,784 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:28:34,785 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:28:34,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:28:34,786 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:34,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:28:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:28:34,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 20:28:34,791 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-04-06 20:28:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:34,792 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 20:28:34,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 20:28:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:28:34,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:34,793 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:34,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:35,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,016 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 948575330, now seen corresponding path program 5 times [2022-04-06 20:28:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [294723985] [2022-04-06 20:28:35,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:35,019 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:35,019 INFO L85 PathProgramCache]: Analyzing trace with hash 948575330, now seen corresponding path program 6 times [2022-04-06 20:28:35,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:35,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467746836] [2022-04-06 20:28:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:35,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:35,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:35,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467746836] [2022-04-06 20:28:35,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467746836] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:35,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940238309] [2022-04-06 20:28:35,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:35,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:35,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:35,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:28:35,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:28:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:28:35,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 20:28:35,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940238309] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:35,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:35,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-04-06 20:28:35,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:35,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [294723985] [2022-04-06 20:28:35,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [294723985] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:35,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:35,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:28:35,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230008247] [2022-04-06 20:28:35,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:35,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:28:35,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:28:35,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:28:35,447 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:35,553 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-06 20:28:35,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:28:35,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 20:28:35,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:35,554 INFO L225 Difference]: With dead ends: 37 [2022-04-06 20:28:35,555 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:28:35,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:28:35,555 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:35,556 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:35,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:28:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:28:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 20:28:35,562 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2022-04-06 20:28:35,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:35,562 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 20:28:35,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:35,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 20:28:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:28:35,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:35,563 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:35,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 20:28:35,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,779 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash -602440374, now seen corresponding path program 7 times [2022-04-06 20:28:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:35,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398804521] [2022-04-06 20:28:35,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:35,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:35,783 INFO L85 PathProgramCache]: Analyzing trace with hash -602440374, now seen corresponding path program 8 times [2022-04-06 20:28:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:35,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948978739] [2022-04-06 20:28:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:35,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948978739] [2022-04-06 20:28:35,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948978739] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:35,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064862246] [2022-04-06 20:28:35,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:35,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:35,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:35,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:35,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:28:35,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:28:35,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:36,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064862246] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:36,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 22 [2022-04-06 20:28:36,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:36,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398804521] [2022-04-06 20:28:36,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398804521] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:36,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:36,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:28:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555964335] [2022-04-06 20:28:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:36,347 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:28:36,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:28:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:28:36,348 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:36,481 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-04-06 20:28:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:28:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-04-06 20:28:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:36,482 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:28:36,482 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:28:36,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:28:36,483 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:36,483 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:28:36,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:28:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 20:28:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-06 20:28:36,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2022-04-06 20:28:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:36,489 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-06 20:28:36,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-06 20:28:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:28:36,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:36,490 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:36,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:36,691 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:36,691 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1653107870, now seen corresponding path program 9 times [2022-04-06 20:28:36,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:36,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1348227950] [2022-04-06 20:28:36,693 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:36,693 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:36,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1653107870, now seen corresponding path program 10 times [2022-04-06 20:28:36,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:36,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533648957] [2022-04-06 20:28:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:36,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:36,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:36,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:36,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533648957] [2022-04-06 20:28:36,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533648957] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:36,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214068855] [2022-04-06 20:28:36,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:36,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:36,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:36,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:36,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:28:36,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:28:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:36,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214068855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:37,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:37,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 17 [2022-04-06 20:28:37,195 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1348227950] [2022-04-06 20:28:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1348227950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:37,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:37,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:28:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181509266] [2022-04-06 20:28:37,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:37,196 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:28:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:28:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:28:37,197 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:37,331 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 20:28:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:28:37,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 20:28:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:37,332 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:28:37,332 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:28:37,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:28:37,333 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:37,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:37,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:28:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 20:28:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-04-06 20:28:37,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2022-04-06 20:28:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:37,340 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-04-06 20:28:37,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-06 20:28:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:28:37,340 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:37,340 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:37,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:37,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:37,541 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -366827958, now seen corresponding path program 11 times [2022-04-06 20:28:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:37,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127421925] [2022-04-06 20:28:37,544 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:37,544 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -366827958, now seen corresponding path program 12 times [2022-04-06 20:28:37,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938819071] [2022-04-06 20:28:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:37,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:37,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938819071] [2022-04-06 20:28:37,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938819071] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893635017] [2022-04-06 20:28:37,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:37,671 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:37,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:28:37,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:37,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:37,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:28:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:28:37,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-06 20:28:38,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893635017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:38,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:38,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-04-06 20:28:38,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:38,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127421925] [2022-04-06 20:28:38,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127421925] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:38,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:38,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:28:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052737835] [2022-04-06 20:28:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:38,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:28:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:28:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:28:38,017 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:38,189 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-04-06 20:28:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:28:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 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 32 [2022-04-06 20:28:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:38,191 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:28:38,191 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:28:38,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:28:38,192 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:38,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:28:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 20:28:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-06 20:28:38,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-04-06 20:28:38,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:38,200 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-06 20:28:38,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-06 20:28:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:28:38,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:38,201 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:38,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:38,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:38,407 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:38,408 INFO L85 PathProgramCache]: Analyzing trace with hash -500184478, now seen corresponding path program 13 times [2022-04-06 20:28:38,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:38,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1799521010] [2022-04-06 20:28:38,410 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:38,410 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash -500184478, now seen corresponding path program 14 times [2022-04-06 20:28:38,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219451] [2022-04-06 20:28:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:38,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:38,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:38,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:38,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219451] [2022-04-06 20:28:38,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219451] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:38,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565449198] [2022-04-06 20:28:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:38,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:38,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:28:38,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:28:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:38,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:39,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565449198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:39,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:39,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 31 [2022-04-06 20:28:39,161 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1799521010] [2022-04-06 20:28:39,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1799521010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:39,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:39,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:28:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406000199] [2022-04-06 20:28:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:39,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:28:39,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:28:39,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:28:39,163 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:39,384 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-06 20:28:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:28:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 20:28:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:39,385 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:28:39,385 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:28:39,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:28:39,387 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:39,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 39 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:28:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 20:28:39,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-04-06 20:28:39,394 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2022-04-06 20:28:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:39,395 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-04-06 20:28:39,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-04-06 20:28:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:28:39,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:39,396 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:39,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:39,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 20:28:39,597 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:39,597 INFO L85 PathProgramCache]: Analyzing trace with hash -479522998, now seen corresponding path program 15 times [2022-04-06 20:28:39,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:39,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2069554935] [2022-04-06 20:28:39,599 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:39,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -479522998, now seen corresponding path program 16 times [2022-04-06 20:28:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:39,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531207838] [2022-04-06 20:28:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:39,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:39,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531207838] [2022-04-06 20:28:39,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531207838] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:39,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142721882] [2022-04-06 20:28:39,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:39,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:39,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:39,767 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:39,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:28:39,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:39,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:28:39,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:40,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142721882] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:40,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:40,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 34 [2022-04-06 20:28:40,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:40,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2069554935] [2022-04-06 20:28:40,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2069554935] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:40,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:40,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:28:40,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482627689] [2022-04-06 20:28:40,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:40,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:28:40,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:28:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:28:40,493 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:40,762 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-04-06 20:28:40,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:28:40,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 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 38 [2022-04-06 20:28:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:40,763 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:28:40,763 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:28:40,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:28:40,764 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:40,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:28:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 20:28:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-04-06 20:28:40,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-04-06 20:28:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:40,772 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-04-06 20:28:40,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-04-06 20:28:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:28:40,773 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:40,773 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:40,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:40,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:40,991 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash 866304354, now seen corresponding path program 17 times [2022-04-06 20:28:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:40,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793597105] [2022-04-06 20:28:40,994 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:40,994 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash 866304354, now seen corresponding path program 18 times [2022-04-06 20:28:40,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:40,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364268852] [2022-04-06 20:28:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:40,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:41,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:41,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:41,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364268852] [2022-04-06 20:28:41,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364268852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:41,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424994492] [2022-04-06 20:28:41,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:41,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:41,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:41,166 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:41,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:28:41,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:41,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:41,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:28:41,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 20:28:41,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 63 proven. 19 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-04-06 20:28:41,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424994492] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:41,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:41,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 8] total 22 [2022-04-06 20:28:41,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793597105] [2022-04-06 20:28:41,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793597105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:41,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:41,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:28:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285888522] [2022-04-06 20:28:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:41,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:28:41,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:41,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:28:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:28:41,682 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:41,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:41,982 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-04-06 20:28:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:28:41,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 20:28:41,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:41,984 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:28:41,984 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:28:41,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:28:41,985 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:41,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:28:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:28:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 20:28:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-04-06 20:28:42,002 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2022-04-06 20:28:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:42,002 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-04-06 20:28:42,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-04-06 20:28:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:28:42,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:42,003 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:42,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:42,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 20:28:42,219 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash 889239626, now seen corresponding path program 19 times [2022-04-06 20:28:42,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:42,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [480126858] [2022-04-06 20:28:42,221 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:42,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash 889239626, now seen corresponding path program 20 times [2022-04-06 20:28:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:42,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407202582] [2022-04-06 20:28:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:42,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407202582] [2022-04-06 20:28:42,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407202582] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835725190] [2022-04-06 20:28:42,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:42,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:42,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:42,415 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:42,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:28:42,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:42,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:28:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835725190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:43,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:43,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 15] total 40 [2022-04-06 20:28:43,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [480126858] [2022-04-06 20:28:43,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [480126858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:43,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:43,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:28:43,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979642542] [2022-04-06 20:28:43,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:43,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:28:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:28:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:28:43,240 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:43,584 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-04-06 20:28:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:28:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-04-06 20:28:43,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:43,586 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:28:43,586 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:28:43,587 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:28:43,588 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:43,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:28:43,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:28:43,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-04-06 20:28:43,598 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2022-04-06 20:28:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:43,598 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-04-06 20:28:43,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-04-06 20:28:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:28:43,603 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:43,603 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:43,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:43,819 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:28:43,819 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:43,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1254127714, now seen corresponding path program 21 times [2022-04-06 20:28:43,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:43,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564030551] [2022-04-06 20:28:43,821 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:43,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1254127714, now seen corresponding path program 22 times [2022-04-06 20:28:43,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:43,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383971557] [2022-04-06 20:28:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:44,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:44,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383971557] [2022-04-06 20:28:44,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383971557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:44,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933135414] [2022-04-06 20:28:44,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:44,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:44,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:44,016 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:44,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:28:44,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:28:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:44,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:44,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933135414] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:44,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:44,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 16] total 43 [2022-04-06 20:28:44,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564030551] [2022-04-06 20:28:44,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564030551] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:44,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:44,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:28:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089282546] [2022-04-06 20:28:44,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:44,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:28:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:28:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:28:44,875 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:45,277 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-04-06 20:28:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:28:45,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 20:28:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:45,278 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:28:45,278 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:28:45,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:28:45,279 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:45,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 49 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:28:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 20:28:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 20:28:45,287 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 47 [2022-04-06 20:28:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:45,288 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 20:28:45,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 20:28:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:28:45,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:45,288 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:45,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:45,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:28:45,495 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1072931146, now seen corresponding path program 23 times [2022-04-06 20:28:45,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1706914151] [2022-04-06 20:28:45,497 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:45,497 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1072931146, now seen corresponding path program 24 times [2022-04-06 20:28:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:45,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848416288] [2022-04-06 20:28:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:45,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848416288] [2022-04-06 20:28:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848416288] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387200086] [2022-04-06 20:28:45,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:45,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:45,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:28:45,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:45,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:45,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:28:45,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 20:28:45,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 20:28:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387200086] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:46,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:46,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 24 [2022-04-06 20:28:46,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:46,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1706914151] [2022-04-06 20:28:46,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1706914151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:46,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:46,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:28:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854757282] [2022-04-06 20:28:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:46,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:28:46,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:46,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:28:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:28:46,104 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:46,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:46,469 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-04-06 20:28:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:28:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-06 20:28:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:46,470 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:28:46,470 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:28:46,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:28:46,471 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:46,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 59 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:28:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 20:28:46,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-04-06 20:28:46,481 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2022-04-06 20:28:46,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:46,481 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-04-06 20:28:46,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:46,481 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-04-06 20:28:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:28:46,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:46,482 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:46,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:46,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:28:46,695 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:46,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:46,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1819864930, now seen corresponding path program 25 times [2022-04-06 20:28:46,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:46,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617933984] [2022-04-06 20:28:46,697 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:46,697 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1819864930, now seen corresponding path program 26 times [2022-04-06 20:28:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:46,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937447403] [2022-04-06 20:28:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:46,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937447403] [2022-04-06 20:28:46,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937447403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836367311] [2022-04-06 20:28:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:46,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:46,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:46,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:28:46,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:46,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:28:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:47,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836367311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:48,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:48,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 49 [2022-04-06 20:28:48,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:48,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617933984] [2022-04-06 20:28:48,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617933984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:48,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:48,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:28:48,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818961470] [2022-04-06 20:28:48,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:48,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:28:48,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:48,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:28:48,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:28:48,050 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:48,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:48,554 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-04-06 20:28:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:28:48,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 20:28:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:48,556 INFO L225 Difference]: With dead ends: 67 [2022-04-06 20:28:48,556 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:28:48,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=442, Invalid=3464, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:28:48,557 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:48,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:28:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:28:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 20:28:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-04-06 20:28:48,567 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2022-04-06 20:28:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:48,567 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-04-06 20:28:48,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-04-06 20:28:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:28:48,568 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:48,568 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:48,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:48,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:48,783 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1498663498, now seen corresponding path program 27 times [2022-04-06 20:28:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123230831] [2022-04-06 20:28:48,785 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:48,785 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1498663498, now seen corresponding path program 28 times [2022-04-06 20:28:48,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:48,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719010911] [2022-04-06 20:28:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:48,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:48,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:48,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719010911] [2022-04-06 20:28:48,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719010911] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:48,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380834439] [2022-04-06 20:28:48,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:48,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:49,002 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:28:49,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:49,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:49,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 20:28:49,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 328 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380834439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:50,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:50,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 19] total 52 [2022-04-06 20:28:50,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:50,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123230831] [2022-04-06 20:28:50,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123230831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:50,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:50,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:28:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519190702] [2022-04-06 20:28:50,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:50,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:28:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:50,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:28:50,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=2252, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:28:50,283 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:50,907 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-04-06 20:28:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:28:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-04-06 20:28:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:50,908 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:28:50,908 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:28:50,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=488, Invalid=3934, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:28:50,909 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:50,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:28:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 20:28:50,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-04-06 20:28:50,919 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-04-06 20:28:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:50,924 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-04-06 20:28:50,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-04-06 20:28:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:28:50,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:50,926 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:50,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:51,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 20:28:51,139 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:51,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:51,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1773938274, now seen corresponding path program 29 times [2022-04-06 20:28:51,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:51,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739253359] [2022-04-06 20:28:51,141 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:51,141 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1773938274, now seen corresponding path program 30 times [2022-04-06 20:28:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:51,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026974705] [2022-04-06 20:28:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:51,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:51,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:51,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:51,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026974705] [2022-04-06 20:28:51,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026974705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:51,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731753265] [2022-04-06 20:28:51,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:51,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:51,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:51,386 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:51,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:28:51,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:51,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:51,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:28:51,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-04-06 20:28:51,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 165 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 20:28:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731753265] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:51,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 8] total 28 [2022-04-06 20:28:51,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:51,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739253359] [2022-04-06 20:28:51,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739253359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:51,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:51,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:28:51,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968646229] [2022-04-06 20:28:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:51,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:28:51,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:28:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:28:51,956 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:52,463 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-04-06 20:28:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:28:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 20:28:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:52,463 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:28:52,464 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:28:52,464 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:28:52,464 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:52,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:52,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:28:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 20:28:52,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:52,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-04-06 20:28:52,474 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2022-04-06 20:28:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:52,475 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-04-06 20:28:52,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:52,475 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-04-06 20:28:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:28:52,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:52,475 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:52,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:52,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:28:52,687 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:52,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash -902745270, now seen corresponding path program 31 times [2022-04-06 20:28:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:52,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1686328147] [2022-04-06 20:28:52,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:52,689 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash -902745270, now seen corresponding path program 32 times [2022-04-06 20:28:52,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:52,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81384168] [2022-04-06 20:28:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:52,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:52,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:52,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81384168] [2022-04-06 20:28:52,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81384168] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:52,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744469507] [2022-04-06 20:28:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:28:52,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:52,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:52,967 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:52,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:28:53,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:28:53,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:28:53,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:53,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 423 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:28:54,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744469507] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:54,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:54,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 21] total 58 [2022-04-06 20:28:54,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:54,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1686328147] [2022-04-06 20:28:54,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1686328147] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:54,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:54,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:28:54,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156906555] [2022-04-06 20:28:54,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:54,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:28:54,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:54,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:28:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:28:54,301 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:54,970 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-04-06 20:28:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:28:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-04-06 20:28:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:54,971 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:28:54,971 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:28:54,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=586, Invalid=4964, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:28:54,973 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:54,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 49 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:28:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 20:28:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-04-06 20:28:54,984 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2022-04-06 20:28:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:54,984 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-04-06 20:28:54,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-04-06 20:28:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:28:54,985 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:54,985 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:55,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:55,199 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:55,199 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1619387038, now seen corresponding path program 33 times [2022-04-06 20:28:55,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:55,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [110681645] [2022-04-06 20:28:55,201 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:55,201 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1619387038, now seen corresponding path program 34 times [2022-04-06 20:28:55,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:55,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391361377] [2022-04-06 20:28:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:55,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391361377] [2022-04-06 20:28:55,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391361377] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428178296] [2022-04-06 20:28:55,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:28:55,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:55,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:55,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:28:55,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:28:55,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:55,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:28:55,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:56,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:57,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428178296] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:57,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:57,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 23] total 60 [2022-04-06 20:28:57,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:57,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [110681645] [2022-04-06 20:28:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [110681645] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:57,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:57,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:28:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555374831] [2022-04-06 20:28:57,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:57,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:28:57,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:28:57,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2648, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:28:57,363 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:57,957 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-04-06 20:28:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:28:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 20:28:57,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:57,958 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:28:57,958 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:28:57,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1340, Invalid=4666, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:28:57,961 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:57,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 49 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:28:57,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:28:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 20:28:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-04-06 20:28:57,992 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2022-04-06 20:28:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:57,993 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-04-06 20:28:57,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-04-06 20:28:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:28:57,996 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:57,996 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:58,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:58,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:58,220 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:58,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:58,221 INFO L85 PathProgramCache]: Analyzing trace with hash -811869110, now seen corresponding path program 35 times [2022-04-06 20:28:58,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:58,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [71792431] [2022-04-06 20:28:58,222 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:58,222 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash -811869110, now seen corresponding path program 36 times [2022-04-06 20:28:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:58,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240648059] [2022-04-06 20:28:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:58,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:58,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:28:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:28:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:28:58,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:28:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240648059] [2022-04-06 20:28:58,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240648059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:28:58,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401668599] [2022-04-06 20:28:58,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:28:58,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:58,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:28:58,510 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:28:58,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:28:58,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:28:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:28:58,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:28:58,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:28:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 20:28:58,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:28:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 20:28:59,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401668599] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:28:59,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:28:59,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 7] total 30 [2022-04-06 20:28:59,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:28:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [71792431] [2022-04-06 20:28:59,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [71792431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:28:59,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:28:59,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:28:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269065329] [2022-04-06 20:28:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:28:59,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:28:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:28:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:28:59,025 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:59,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:28:59,728 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-04-06 20:28:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:28:59,729 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-04-06 20:28:59,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:28:59,729 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:28:59,729 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:28:59,730 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=192, Invalid=2160, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:28:59,731 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:28:59,731 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 29 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:28:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:28:59,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 20:28:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-04-06 20:28:59,739 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-04-06 20:28:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:28:59,739 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-04-06 20:28:59,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:28:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-04-06 20:28:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:28:59,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:28:59,740 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:28:59,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:28:59,952 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:28:59,953 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:28:59,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:28:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash -157100958, now seen corresponding path program 37 times [2022-04-06 20:28:59,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:28:59,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1624126690] [2022-04-06 20:28:59,954 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:28:59,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:28:59,954 INFO L85 PathProgramCache]: Analyzing trace with hash -157100958, now seen corresponding path program 38 times [2022-04-06 20:28:59,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:28:59,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864703160] [2022-04-06 20:28:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:28:59,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:28:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:00,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:00,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864703160] [2022-04-06 20:29:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864703160] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50749660] [2022-04-06 20:29:00,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:00,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:00,279 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:00,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:29:00,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:00,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:00,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:29:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:01,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:02,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50749660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:02,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 24] total 67 [2022-04-06 20:29:02,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1624126690] [2022-04-06 20:29:02,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1624126690] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:02,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:02,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:29:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032048056] [2022-04-06 20:29:02,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:02,016 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:29:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:29:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=3792, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:29:02,017 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:02,886 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-04-06 20:29:02,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:29:02,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 20:29:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:02,888 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:29:02,888 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:29:02,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=748, Invalid=6734, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:29:02,889 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:02,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 69 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:29:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:29:02,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 20:29:02,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 20:29:02,897 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2022-04-06 20:29:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:02,897 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 20:29:02,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 20:29:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:29:02,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:02,898 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:02,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:03,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 20:29:03,107 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1700543158, now seen corresponding path program 39 times [2022-04-06 20:29:03,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:03,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123503177] [2022-04-06 20:29:03,110 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:03,110 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:03,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1700543158, now seen corresponding path program 40 times [2022-04-06 20:29:03,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:03,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162524172] [2022-04-06 20:29:03,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:03,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:03,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162524172] [2022-04-06 20:29:03,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162524172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:03,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001350607] [2022-04-06 20:29:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:03,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:03,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:03,499 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:03,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:29:03,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 20:29:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:03,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:05,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001350607] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:05,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:05,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 26] total 50 [2022-04-06 20:29:05,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:05,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123503177] [2022-04-06 20:29:05,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123503177] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:05,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:05,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:29:05,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630487663] [2022-04-06 20:29:05,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:05,320 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:29:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:29:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1822, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:29:05,321 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:06,075 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-04-06 20:29:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:29:06,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-04-06 20:29:06,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:06,076 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:29:06,076 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:29:06,077 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1214, Invalid=3756, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:29:06,078 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:06,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 49 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:29:06,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:29:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:29:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-04-06 20:29:06,090 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2022-04-06 20:29:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:06,090 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-04-06 20:29:06,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-04-06 20:29:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:29:06,091 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:06,091 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:06,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:06,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:29:06,291 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash -467252382, now seen corresponding path program 41 times [2022-04-06 20:29:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:06,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [153233670] [2022-04-06 20:29:06,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:06,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash -467252382, now seen corresponding path program 42 times [2022-04-06 20:29:06,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:06,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939089591] [2022-04-06 20:29:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:06,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:06,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939089591] [2022-04-06 20:29:06,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939089591] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835514678] [2022-04-06 20:29:06,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:06,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:06,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:06,642 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:06,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:29:06,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:29:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-04-06 20:29:06,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-04-06 20:29:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835514678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:07,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 33 [2022-04-06 20:29:07,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [153233670] [2022-04-06 20:29:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [153233670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:29:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877874318] [2022-04-06 20:29:07,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:07,229 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:29:07,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:29:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:29:07,229 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:08,040 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-04-06 20:29:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:29:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 20:29:08,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:08,041 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:29:08,041 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:29:08,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=2751, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:29:08,042 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:08,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 84 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:29:08,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:29:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 20:29:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-04-06 20:29:08,053 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2022-04-06 20:29:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:08,053 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-04-06 20:29:08,053 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-04-06 20:29:08,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:29:08,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:08,054 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:08,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:08,257 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:08,257 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:08,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1348005450, now seen corresponding path program 43 times [2022-04-06 20:29:08,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:08,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [547093665] [2022-04-06 20:29:08,259 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:08,259 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1348005450, now seen corresponding path program 44 times [2022-04-06 20:29:08,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:08,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231353110] [2022-04-06 20:29:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231353110] [2022-04-06 20:29:08,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231353110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234924275] [2022-04-06 20:29:08,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:08,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:08,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:08,631 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:08,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:29:08,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:29:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:09,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:10,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234924275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:10,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:10,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29, 27] total 76 [2022-04-06 20:29:10,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:10,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [547093665] [2022-04-06 20:29:10,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [547093665] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:10,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:10,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:29:10,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768407528] [2022-04-06 20:29:10,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:10,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:29:10,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:10,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:29:10,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=4908, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:29:10,758 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:11,849 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-04-06 20:29:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:29:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-04-06 20:29:11,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:11,850 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:29:11,850 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:29:11,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=928, Invalid=8774, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:29:11,852 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:11,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 69 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:29:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:29:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 20:29:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-04-06 20:29:11,862 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2022-04-06 20:29:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:11,863 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-04-06 20:29:11,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-04-06 20:29:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:29:11,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:11,864 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:11,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:12,066 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:12,066 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:12,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:12,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1760854626, now seen corresponding path program 45 times [2022-04-06 20:29:12,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:12,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [405823731] [2022-04-06 20:29:12,069 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:12,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:12,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1760854626, now seen corresponding path program 46 times [2022-04-06 20:29:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:12,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380172026] [2022-04-06 20:29:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:12,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:12,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380172026] [2022-04-06 20:29:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380172026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:12,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348148525] [2022-04-06 20:29:12,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:12,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:12,514 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:12,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:29:12,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 20:29:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:13,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:14,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348148525] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:14,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:14,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 28] total 79 [2022-04-06 20:29:14,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [405823731] [2022-04-06 20:29:14,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [405823731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:14,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:14,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:29:14,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356554011] [2022-04-06 20:29:14,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:14,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:29:14,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:29:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=5312, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:29:14,943 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:16,131 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-04-06 20:29:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:29:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 20:29:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:16,132 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:29:16,132 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:29:16,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=992, Invalid=9514, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:29:16,134 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:16,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 99 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:29:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:29:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 20:29:16,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-04-06 20:29:16,147 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2022-04-06 20:29:16,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:16,147 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-04-06 20:29:16,147 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:16,147 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-04-06 20:29:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:29:16,148 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:16,148 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:16,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:29:16,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:29:16,359 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash 164321098, now seen corresponding path program 47 times [2022-04-06 20:29:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1632177276] [2022-04-06 20:29:16,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:16,362 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 164321098, now seen corresponding path program 48 times [2022-04-06 20:29:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510673693] [2022-04-06 20:29:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:16,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 49 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510673693] [2022-04-06 20:29:16,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510673693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:16,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074238469] [2022-04-06 20:29:16,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:16,836 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:16,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:29:16,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:16,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:16,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:29:16,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2022-04-06 20:29:17,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 24 proven. 49 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2022-04-06 20:29:17,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074238469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:17,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:17,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8, 8] total 38 [2022-04-06 20:29:17,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:17,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1632177276] [2022-04-06 20:29:17,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1632177276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:17,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:17,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:29:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740945014] [2022-04-06 20:29:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:17,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:29:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:17,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:29:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1293, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:29:17,683 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:18,673 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-04-06 20:29:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:29:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-04-06 20:29:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:18,673 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:29:18,673 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:29:18,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=3645, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:29:18,674 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:18,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:29:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:29:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 20:29:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-04-06 20:29:18,686 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2022-04-06 20:29:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:18,687 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-04-06 20:29:18,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-04-06 20:29:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:29:18,687 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:18,688 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:18,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:29:18,888 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:29:18,888 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:18,889 INFO L85 PathProgramCache]: Analyzing trace with hash 301824354, now seen corresponding path program 49 times [2022-04-06 20:29:18,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:18,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803097139] [2022-04-06 20:29:18,890 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:18,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:18,890 INFO L85 PathProgramCache]: Analyzing trace with hash 301824354, now seen corresponding path program 50 times [2022-04-06 20:29:18,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:18,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653893687] [2022-04-06 20:29:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:18,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:19,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:19,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653893687] [2022-04-06 20:29:19,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653893687] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005784694] [2022-04-06 20:29:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:19,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:19,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:19,391 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:19,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:29:19,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:29:19,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:20,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005784694] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:21,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:21,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 30] total 85 [2022-04-06 20:29:21,971 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803097139] [2022-04-06 20:29:21,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803097139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:21,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:21,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:29:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230563732] [2022-04-06 20:29:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:21,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:29:21,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:29:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=6168, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:29:21,972 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:23,321 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-04-06 20:29:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:29:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 20:29:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:23,322 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:29:23,322 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 20:29:23,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1126, Invalid=11084, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:29:23,323 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:23,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 39 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:29:23,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 20:29:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 20:29:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-04-06 20:29:23,334 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2022-04-06 20:29:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:23,335 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-04-06 20:29:23,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-04-06 20:29:23,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 20:29:23,336 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:23,336 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:23,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:29:23,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:29:23,558 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:23,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:23,558 INFO L85 PathProgramCache]: Analyzing trace with hash -737476534, now seen corresponding path program 51 times [2022-04-06 20:29:23,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:23,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [604304797] [2022-04-06 20:29:23,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:23,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash -737476534, now seen corresponding path program 52 times [2022-04-06 20:29:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:23,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138516459] [2022-04-06 20:29:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:23,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:23,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:24,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138516459] [2022-04-06 20:29:24,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138516459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:24,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044857647] [2022-04-06 20:29:24,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:24,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:24,032 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:24,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:29:24,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:24,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:29:24,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:25,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1078 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:26,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044857647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:26,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 31] total 88 [2022-04-06 20:29:26,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [604304797] [2022-04-06 20:29:26,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [604304797] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:26,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:26,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:29:26,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365701461] [2022-04-06 20:29:26,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:26,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:29:26,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:29:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1036, Invalid=6620, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:29:26,794 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:28,275 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-04-06 20:29:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:29:28,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-04-06 20:29:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:28,276 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:29:28,276 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:29:28,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1196, Invalid=11914, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:29:28,278 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2208 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:28,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 139 Invalid, 2263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:29:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:29:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 20:29:28,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-04-06 20:29:28,296 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2022-04-06 20:29:28,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:28,296 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-04-06 20:29:28,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:28,296 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-04-06 20:29:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:29:28,298 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:28,298 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:28,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:28,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:29:28,503 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:28,504 INFO L85 PathProgramCache]: Analyzing trace with hash -130994078, now seen corresponding path program 53 times [2022-04-06 20:29:28,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820565042] [2022-04-06 20:29:28,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:28,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash -130994078, now seen corresponding path program 54 times [2022-04-06 20:29:28,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:28,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784401793] [2022-04-06 20:29:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:28,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:28,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:28,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784401793] [2022-04-06 20:29:28,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784401793] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:28,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491396058] [2022-04-06 20:29:28,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:28,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:28,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:28,977 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:28,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:29:29,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:29,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:29,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:29:29,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-04-06 20:29:29,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2022-04-06 20:29:29,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491396058] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:29,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:29,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 7, 7] total 39 [2022-04-06 20:29:29,667 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:29,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820565042] [2022-04-06 20:29:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820565042] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:29,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:29,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:29:29,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515883242] [2022-04-06 20:29:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:29,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:29:29,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:29:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:29:29,668 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:30,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:30,903 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-04-06 20:29:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:29:30,904 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 20:29:30,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:30,904 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:29:30,907 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:29:30,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=4149, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:29:30,909 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:30,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 54 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:29:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:29:30,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-04-06 20:29:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 20:29:30,923 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2022-04-06 20:29:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:30,923 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 20:29:30,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:30,923 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 20:29:30,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:29:30,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:30,924 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:30,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:29:31,124 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:31,124 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1339561654, now seen corresponding path program 55 times [2022-04-06 20:29:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438002646] [2022-04-06 20:29:31,126 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:31,126 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:31,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1339561654, now seen corresponding path program 56 times [2022-04-06 20:29:31,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:31,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498159016] [2022-04-06 20:29:31,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:31,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:31,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:31,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498159016] [2022-04-06 20:29:31,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498159016] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119109167] [2022-04-06 20:29:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:31,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:31,646 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:31,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:29:31,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:31,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:29:31,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:32,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1245 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:34,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119109167] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:34,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:34,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 35, 33] total 94 [2022-04-06 20:29:34,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438002646] [2022-04-06 20:29:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438002646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:34,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:34,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:29:34,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917677352] [2022-04-06 20:29:34,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:34,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:29:34,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:29:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1170, Invalid=7572, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:29:34,717 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:36,431 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-04-06 20:29:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:29:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-04-06 20:29:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:36,432 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:29:36,432 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:29:36,433 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2737 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1342, Invalid=13664, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:29:36,434 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:36,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 154 Invalid, 2611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:29:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:29:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-04-06 20:29:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-04-06 20:29:36,449 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2022-04-06 20:29:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:36,449 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-04-06 20:29:36,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-04-06 20:29:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:29:36,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:36,450 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:36,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:29:36,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:36,655 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:36,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1065375902, now seen corresponding path program 57 times [2022-04-06 20:29:36,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:36,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256743205] [2022-04-06 20:29:36,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:36,657 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1065375902, now seen corresponding path program 58 times [2022-04-06 20:29:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:36,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219963245] [2022-04-06 20:29:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:37,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:37,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:37,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219963245] [2022-04-06 20:29:37,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219963245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:37,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708245460] [2022-04-06 20:29:37,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:37,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:37,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:37,175 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:37,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:29:37,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:37,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:29:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:37,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:40,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708245460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:40,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:40,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 35] total 68 [2022-04-06 20:29:40,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:40,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256743205] [2022-04-06 20:29:40,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256743205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:40,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:40,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:29:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107437226] [2022-04-06 20:29:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:40,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:29:40,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:40,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:29:40,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3397, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:29:40,270 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:41,628 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-04-06 20:29:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:29:41,629 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 20:29:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:41,629 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:29:41,629 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:29:41,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2267, Invalid=7239, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:29:41,631 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:41,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 34 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:29:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:29:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-06 20:29:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-04-06 20:29:41,646 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2022-04-06 20:29:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:41,646 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-04-06 20:29:41,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-04-06 20:29:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:29:41,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:41,646 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:41,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:41,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 20:29:41,847 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1825435062, now seen corresponding path program 59 times [2022-04-06 20:29:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:41,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517752051] [2022-04-06 20:29:41,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:41,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:41,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1825435062, now seen corresponding path program 60 times [2022-04-06 20:29:41,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188684292] [2022-04-06 20:29:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:42,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 61 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188684292] [2022-04-06 20:29:42,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188684292] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:42,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228845917] [2022-04-06 20:29:42,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:42,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:42,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:42,430 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:42,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:29:42,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:29:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2022-04-06 20:29:42,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 630 proven. 61 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2022-04-06 20:29:43,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228845917] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:43,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:43,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 7, 8] total 43 [2022-04-06 20:29:43,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:43,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517752051] [2022-04-06 20:29:43,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517752051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:43,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:43,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:29:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001034787] [2022-04-06 20:29:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:43,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:29:43,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:29:43,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:29:43,344 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:44,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:44,799 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-04-06 20:29:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:29:44,799 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-04-06 20:29:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:44,800 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:29:44,800 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:29:44,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=305, Invalid=5097, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:29:44,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:44,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 34 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:29:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:29:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 20:29:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-04-06 20:29:44,814 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-04-06 20:29:44,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:44,814 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-04-06 20:29:44,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-04-06 20:29:44,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:29:44,815 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:44,815 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:44,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:29:45,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:45,016 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1680286110, now seen corresponding path program 61 times [2022-04-06 20:29:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856242650] [2022-04-06 20:29:45,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:45,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1680286110, now seen corresponding path program 62 times [2022-04-06 20:29:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803667933] [2022-04-06 20:29:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:45,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:45,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:45,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:45,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:45,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803667933] [2022-04-06 20:29:45,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803667933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:45,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397711062] [2022-04-06 20:29:45,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:29:45,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:45,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:45,681 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:45,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:29:45,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:29:45,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:29:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:47,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 1518 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:49,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397711062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:49,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:49,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 36] total 103 [2022-04-06 20:29:49,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:49,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856242650] [2022-04-06 20:29:49,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856242650] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:49,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:49,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:29:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926695035] [2022-04-06 20:29:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:49,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:29:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:49,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:29:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1386, Invalid=9120, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:29:49,297 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:51,346 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-04-06 20:29:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:29:51,346 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 20:29:51,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:51,347 INFO L225 Difference]: With dead ends: 121 [2022-04-06 20:29:51,347 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 20:29:51,348 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1576, Invalid=16514, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:29:51,349 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 3050 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 3050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:51,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 124 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 3050 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:29:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 20:29:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 20:29:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:51,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-04-06 20:29:51,369 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2022-04-06 20:29:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:51,369 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-04-06 20:29:51,369 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-04-06 20:29:51,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 20:29:51,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:51,370 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:51,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:29:51,570 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:51,570 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:51,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1715043146, now seen corresponding path program 63 times [2022-04-06 20:29:51,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:51,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1104365459] [2022-04-06 20:29:51,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:51,572 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:51,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1715043146, now seen corresponding path program 64 times [2022-04-06 20:29:51,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:51,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077902164] [2022-04-06 20:29:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:52,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:52,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077902164] [2022-04-06 20:29:52,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077902164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:52,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271474555] [2022-04-06 20:29:52,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:29:52,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:52,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:52,211 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:52,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:29:52,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:29:52,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:52,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:29:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:53,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:29:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1615 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:29:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271474555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:29:56,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:29:56,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 37] total 106 [2022-04-06 20:29:56,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:29:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1104365459] [2022-04-06 20:29:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1104365459] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:29:56,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:29:56,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:29:56,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18857092] [2022-04-06 20:29:56,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:29:56,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:29:56,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:29:56,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1462, Invalid=9668, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:29:56,047 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:29:58,200 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-04-06 20:29:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:29:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-04-06 20:29:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:29:58,201 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:29:58,201 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:29:58,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3509 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1658, Invalid=17524, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:29:58,202 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3294 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:29:58,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 169 Invalid, 3361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3294 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:29:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:29:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 20:29:58,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-04-06 20:29:58,221 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 110 [2022-04-06 20:29:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:29:58,221 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-04-06 20:29:58,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:29:58,221 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-04-06 20:29:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:29:58,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:29:58,222 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:29:58,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:29:58,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 20:29:58,422 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:29:58,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:29:58,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1194120546, now seen corresponding path program 65 times [2022-04-06 20:29:58,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:29:58,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1059216173] [2022-04-06 20:29:58,424 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:29:58,424 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:29:58,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1194120546, now seen corresponding path program 66 times [2022-04-06 20:29:58,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:29:58,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848585819] [2022-04-06 20:29:58,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:29:58,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:29:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:59,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:29:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:29:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 67 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:29:59,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:29:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848585819] [2022-04-06 20:29:59,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848585819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:29:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652506152] [2022-04-06 20:29:59,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:29:59,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:29:59,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:29:59,183 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:29:59,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:29:59,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:29:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:29:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:29:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:29:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 20:29:59,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2022-04-06 20:30:00,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652506152] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:00,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:00,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 7] total 45 [2022-04-06 20:30:00,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:00,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1059216173] [2022-04-06 20:30:00,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1059216173] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:00,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:00,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:30:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285934917] [2022-04-06 20:30:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:00,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:30:00,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:00,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:30:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1855, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:30:00,114 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:01,830 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-04-06 20:30:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:30:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 20:30:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:01,831 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:30:01,831 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:30:01,832 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=5835, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:30:01,832 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 3364 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 3433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:01,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 64 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3364 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:30:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:30:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-06 20:30:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-04-06 20:30:01,858 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2022-04-06 20:30:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:01,859 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-04-06 20:30:01,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-04-06 20:30:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:30:01,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:01,859 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:01,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:30:02,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:30:02,065 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 105784394, now seen corresponding path program 67 times [2022-04-06 20:30:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311026777] [2022-04-06 20:30:02,066 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:02,066 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:02,067 INFO L85 PathProgramCache]: Analyzing trace with hash 105784394, now seen corresponding path program 68 times [2022-04-06 20:30:02,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:02,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429633342] [2022-04-06 20:30:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:02,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:02,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:02,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429633342] [2022-04-06 20:30:02,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429633342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:02,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923788197] [2022-04-06 20:30:02,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:02,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:02,743 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:02,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:30:02,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:02,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:02,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:30:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:04,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:04,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1818 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923788197] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:06,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 41, 39] total 112 [2022-04-06 20:30:06,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:06,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311026777] [2022-04-06 20:30:06,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311026777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:06,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:06,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:30:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987051852] [2022-04-06 20:30:06,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:06,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:30:06,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:30:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1620, Invalid=10812, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:30:06,947 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:09,336 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-04-06 20:30:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:30:09,337 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 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 116 [2022-04-06 20:30:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:09,337 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:30:09,337 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:30:09,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 159 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3931 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1828, Invalid=19634, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:30:09,338 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3632 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:09,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 119 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:30:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:30:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-04-06 20:30:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-04-06 20:30:09,356 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2022-04-06 20:30:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:09,356 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-04-06 20:30:09,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:09,357 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-04-06 20:30:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:30:09,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:09,357 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:09,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:30:09,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:30:09,558 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:09,558 INFO L85 PathProgramCache]: Analyzing trace with hash 191597666, now seen corresponding path program 69 times [2022-04-06 20:30:09,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:09,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265168207] [2022-04-06 20:30:09,560 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:09,560 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 191597666, now seen corresponding path program 70 times [2022-04-06 20:30:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:09,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142890269] [2022-04-06 20:30:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:10,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 71 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:10,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142890269] [2022-04-06 20:30:10,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142890269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:10,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254438391] [2022-04-06 20:30:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:10,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:10,277 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:10,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:30:10,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:10,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:30:10,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:12,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1924 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:14,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254438391] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:14,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:14,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42, 40] total 115 [2022-04-06 20:30:14,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:14,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265168207] [2022-04-06 20:30:14,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265168207] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:14,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:14,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:30:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582906357] [2022-04-06 20:30:14,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:14,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:30:14,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:30:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1702, Invalid=11408, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:30:14,790 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:17,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:17,345 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-04-06 20:30:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:30:17,345 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 20:30:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:17,346 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:30:17,346 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:30:17,347 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1916, Invalid=20734, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:30:17,347 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:17,347 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 184 Invalid, 3991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:30:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:30:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-04-06 20:30:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-04-06 20:30:17,362 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2022-04-06 20:30:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:17,363 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-04-06 20:30:17,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-04-06 20:30:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 20:30:17,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:17,363 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:17,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-04-06 20:30:17,564 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:17,564 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:17,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1149242698, now seen corresponding path program 71 times [2022-04-06 20:30:17,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:17,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321875526] [2022-04-06 20:30:17,566 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:17,566 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1149242698, now seen corresponding path program 72 times [2022-04-06 20:30:17,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:17,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087931279] [2022-04-06 20:30:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:17,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:18,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 73 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:18,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087931279] [2022-04-06 20:30:18,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087931279] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:18,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430730924] [2022-04-06 20:30:18,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:18,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:18,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:18,367 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:18,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:30:18,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:30:18,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:30:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2022-04-06 20:30:18,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 900 proven. 73 refuted. 0 times theorem prover too weak. 1062 trivial. 0 not checked. [2022-04-06 20:30:19,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430730924] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:19,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 7, 8] total 49 [2022-04-06 20:30:19,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:19,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321875526] [2022-04-06 20:30:19,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321875526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:19,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:30:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740260758] [2022-04-06 20:30:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:19,376 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:30:19,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:30:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2213, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:30:19,376 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:21,408 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-04-06 20:30:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:30:21,409 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-04-06 20:30:21,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:21,409 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:30:21,409 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:30:21,410 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=359, Invalid=6951, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:30:21,410 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 4057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:21,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 59 Invalid, 4057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:30:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:30:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-04-06 20:30:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-04-06 20:30:21,427 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2022-04-06 20:30:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:21,427 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-04-06 20:30:21,427 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-04-06 20:30:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:30:21,428 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:21,428 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:21,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 20:30:21,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:30:21,629 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:21,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1115356318, now seen corresponding path program 73 times [2022-04-06 20:30:21,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:21,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813843070] [2022-04-06 20:30:21,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:21,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1115356318, now seen corresponding path program 74 times [2022-04-06 20:30:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775797669] [2022-04-06 20:30:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:22,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775797669] [2022-04-06 20:30:22,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775797669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795214109] [2022-04-06 20:30:22,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:22,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:22,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:22,448 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:22,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:30:22,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:22,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:30:22,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:24,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795214109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:27,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 44, 42] total 121 [2022-04-06 20:30:27,305 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:27,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813843070] [2022-04-06 20:30:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813843070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:27,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:27,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:30:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651098465] [2022-04-06 20:30:27,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:27,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:30:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:30:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1872, Invalid=12648, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:30:27,307 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:30,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:30,053 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-04-06 20:30:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:30:30,054 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 20:30:30,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:30,055 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:30:30,055 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:30:30,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2098, Invalid=23024, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 20:30:30,057 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4166 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 4243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:30,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 29 Invalid, 4243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4166 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:30:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:30:30,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-06 20:30:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-04-06 20:30:30,089 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2022-04-06 20:30:30,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:30,090 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-04-06 20:30:30,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-04-06 20:30:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 20:30:30,090 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:30,090 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:30,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:30,313 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:30:30,313 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -438356406, now seen corresponding path program 75 times [2022-04-06 20:30:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:30,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529325620] [2022-04-06 20:30:30,315 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:30,315 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:30,315 INFO L85 PathProgramCache]: Analyzing trace with hash -438356406, now seen corresponding path program 76 times [2022-04-06 20:30:30,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:30,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166966434] [2022-04-06 20:30:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:30,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:31,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:31,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166966434] [2022-04-06 20:30:31,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166966434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:31,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337260978] [2022-04-06 20:30:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:31,126 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:31,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:30:31,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:31,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:30:31,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:36,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337260978] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:36,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:36,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 45, 43] total 124 [2022-04-06 20:30:36,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:36,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529325620] [2022-04-06 20:30:36,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529325620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:36,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:30:36,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123160761] [2022-04-06 20:30:36,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:36,392 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:30:36,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:30:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1960, Invalid=13292, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:30:36,394 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:39,322 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-04-06 20:30:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:30:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 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 128 [2022-04-06 20:30:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:39,328 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:30:39,329 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:30:39,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2192, Invalid=24214, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:30:39,332 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4494 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:39,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 114 Invalid, 4573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4494 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:30:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:30:39,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-04-06 20:30:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-04-06 20:30:39,357 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2022-04-06 20:30:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:39,357 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-04-06 20:30:39,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-04-06 20:30:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:30:39,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:39,358 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:39,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:39,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:39,581 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1100400030, now seen corresponding path program 77 times [2022-04-06 20:30:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [145270416] [2022-04-06 20:30:39,583 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:39,583 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:39,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1100400030, now seen corresponding path program 78 times [2022-04-06 20:30:39,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:39,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415820010] [2022-04-06 20:30:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:39,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:40,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 79 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:40,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415820010] [2022-04-06 20:30:40,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415820010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730260622] [2022-04-06 20:30:40,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:30:40,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:40,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:40,391 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:40,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:30:40,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:30:40,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:40,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:30:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2022-04-06 20:30:40,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2022-04-06 20:30:41,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730260622] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:41,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:41,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 7, 7] total 51 [2022-04-06 20:30:41,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:41,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [145270416] [2022-04-06 20:30:41,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [145270416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:41,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:41,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:30:41,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868276580] [2022-04-06 20:30:41,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:41,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:30:41,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:30:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2407, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:30:41,356 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:43,689 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-04-06 20:30:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:30:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 20:30:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:43,690 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:30:43,690 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:30:43,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 256 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=381, Invalid=7809, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:30:43,691 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4762 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 4843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:43,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 144 Invalid, 4843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4762 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:30:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:30:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-04-06 20:30:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:43,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-04-06 20:30:43,718 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2022-04-06 20:30:43,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:43,719 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-04-06 20:30:43,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:43,719 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-04-06 20:30:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 20:30:43,720 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:43,720 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:43,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:43,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:30:43,939 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1552179382, now seen corresponding path program 79 times [2022-04-06 20:30:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [733139915] [2022-04-06 20:30:43,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:43,942 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:43,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1552179382, now seen corresponding path program 80 times [2022-04-06 20:30:43,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837739932] [2022-04-06 20:30:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:43,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837739932] [2022-04-06 20:30:44,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837739932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:44,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198017930] [2022-04-06 20:30:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:30:44,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:44,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:44,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:30:44,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:30:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:30:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:47,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:30:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2499 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:30:50,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198017930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:30:50,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:30:50,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47, 45] total 130 [2022-04-06 20:30:50,520 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:30:50,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [733139915] [2022-04-06 20:30:50,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [733139915] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:30:50,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:30:50,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:30:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634986270] [2022-04-06 20:30:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:30:50,521 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:30:50,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:50,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:30:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2142, Invalid=14628, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 20:30:50,522 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:53,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:30:53,750 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-04-06 20:30:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:30:53,750 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 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 134 [2022-04-06 20:30:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:30:53,751 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:30:53,751 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:30:53,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5341 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2386, Invalid=26684, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 20:30:53,753 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5012 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 5095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 5012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:30:53,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 154 Invalid, 5095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 5012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:30:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:30:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-04-06 20:30:53,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:53,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-04-06 20:30:53,773 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 134 [2022-04-06 20:30:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:30:53,773 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-04-06 20:30:53,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:30:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-04-06 20:30:53,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:30:53,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:30:53,774 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:30:53,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 20:30:53,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:53,975 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:30:53,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:30:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -83349150, now seen corresponding path program 81 times [2022-04-06 20:30:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:30:53,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [584744851] [2022-04-06 20:30:53,978 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:30:53,978 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:30:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash -83349150, now seen corresponding path program 82 times [2022-04-06 20:30:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:30:53,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218695677] [2022-04-06 20:30:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:30:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:30:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:30:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:30:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:30:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218695677] [2022-04-06 20:30:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218695677] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:30:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339197088] [2022-04-06 20:30:54,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:30:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:30:54,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:30:54,855 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:30:54,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:30:54,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:30:54,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:30:54,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:30:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:30:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:30:57,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 0 proven. 2623 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:00,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339197088] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:00,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:00,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 48, 46] total 133 [2022-04-06 20:31:00,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [584744851] [2022-04-06 20:31:00,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [584744851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:00,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:00,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:31:00,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016878129] [2022-04-06 20:31:00,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:00,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:31:00,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:00,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:31:00,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2236, Invalid=15320, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:31:00,771 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:04,089 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-04-06 20:31:04,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:31:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 20:31:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:04,090 INFO L225 Difference]: With dead ends: 151 [2022-04-06 20:31:04,090 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 20:31:04,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5597 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2486, Invalid=27964, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:31:04,092 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 5106 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 5106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:04,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 29 Invalid, 5191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 5106 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:31:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 20:31:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-04-06 20:31:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-04-06 20:31:04,118 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2022-04-06 20:31:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:04,119 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-04-06 20:31:04,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-04-06 20:31:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 20:31:04,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:04,120 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:04,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:31:04,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:04,328 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:04,328 INFO L85 PathProgramCache]: Analyzing trace with hash 711280714, now seen corresponding path program 83 times [2022-04-06 20:31:04,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:04,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485578675] [2022-04-06 20:31:04,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:04,330 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash 711280714, now seen corresponding path program 84 times [2022-04-06 20:31:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897821420] [2022-04-06 20:31:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:05,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:05,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897821420] [2022-04-06 20:31:05,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897821420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:05,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817997035] [2022-04-06 20:31:05,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:05,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:05,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:05,244 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:05,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:31:05,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:31:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:31:05,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2022-04-06 20:31:05,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1218 proven. 85 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-04-06 20:31:06,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817997035] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:06,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:06,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 7, 8] total 55 [2022-04-06 20:31:06,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:06,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485578675] [2022-04-06 20:31:06,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485578675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:06,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:06,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:31:06,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002643881] [2022-04-06 20:31:06,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:06,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:31:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:06,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:31:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2813, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:31:06,392 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:09,052 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-04-06 20:31:09,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:31:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 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 140 [2022-04-06 20:31:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:09,054 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:31:09,054 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:31:09,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=413, Invalid=9093, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:31:09,055 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 5404 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 5491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:09,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 5491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5404 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:31:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:31:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-04-06 20:31:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-04-06 20:31:09,085 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2022-04-06 20:31:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:09,085 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-04-06 20:31:09,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-04-06 20:31:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:31:09,086 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:09,086 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:09,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:09,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 20:31:09,300 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -330176414, now seen corresponding path program 85 times [2022-04-06 20:31:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:09,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734582702] [2022-04-06 20:31:09,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:09,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash -330176414, now seen corresponding path program 86 times [2022-04-06 20:31:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:09,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129629443] [2022-04-06 20:31:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:10,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129629443] [2022-04-06 20:31:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129629443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038825333] [2022-04-06 20:31:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:10,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:10,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:10,257 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:10,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:31:10,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:10,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:10,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:31:10,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:12,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 0 proven. 2880 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038825333] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:16,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:16,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 50, 48] total 139 [2022-04-06 20:31:16,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734582702] [2022-04-06 20:31:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734582702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:16,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:16,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:31:16,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732712729] [2022-04-06 20:31:16,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:16,574 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:31:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:16,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:31:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2430, Invalid=16752, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 20:31:16,575 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:20,245 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-04-06 20:31:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:31:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 20:31:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:20,246 INFO L225 Difference]: With dead ends: 157 [2022-04-06 20:31:20,247 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:31:20,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6127 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2692, Invalid=30614, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:31:20,248 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 5774 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:20,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 164 Invalid, 5863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:31:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:31:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-04-06 20:31:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-04-06 20:31:20,280 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2022-04-06 20:31:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:20,280 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-04-06 20:31:20,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-04-06 20:31:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 20:31:20,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:20,281 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:20,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:31:20,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:31:20,495 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:20,496 INFO L85 PathProgramCache]: Analyzing trace with hash 464269642, now seen corresponding path program 87 times [2022-04-06 20:31:20,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:20,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707188388] [2022-04-06 20:31:20,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:20,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 464269642, now seen corresponding path program 88 times [2022-04-06 20:31:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:20,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473434124] [2022-04-06 20:31:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:21,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:21,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:21,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473434124] [2022-04-06 20:31:21,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473434124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:21,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976810859] [2022-04-06 20:31:21,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:21,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:21,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:21,504 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:31:21,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:21,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:21,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:31:21,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:22,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976810859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:25,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 95 [2022-04-06 20:31:25,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707188388] [2022-04-06 20:31:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707188388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:25,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:31:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658952688] [2022-04-06 20:31:25,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:25,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:31:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:31:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2349, Invalid=6581, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:31:25,666 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:28,438 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-04-06 20:31:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:31:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 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 146 [2022-04-06 20:31:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:28,439 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:31:28,439 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:31:28,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4687, Invalid=14773, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:31:28,441 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5952 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 6043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 5952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:28,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 94 Invalid, 6043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 5952 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:31:28,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:31:28,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-04-06 20:31:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-04-06 20:31:28,473 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2022-04-06 20:31:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:28,474 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-04-06 20:31:28,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-04-06 20:31:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:31:28,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:28,475 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:28,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:28,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:31:28,679 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:28,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1758044318, now seen corresponding path program 89 times [2022-04-06 20:31:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1816183314] [2022-04-06 20:31:28,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:28,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:28,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1758044318, now seen corresponding path program 90 times [2022-04-06 20:31:28,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905735917] [2022-04-06 20:31:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:29,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 91 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:29,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905735917] [2022-04-06 20:31:29,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905735917] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:29,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700979987] [2022-04-06 20:31:29,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:31:29,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:29,680 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:29,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:31:29,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:31:29,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:31:29,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2022-04-06 20:31:30,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 3060 trivial. 0 not checked. [2022-04-06 20:31:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700979987] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:30,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:30,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 7, 7] total 57 [2022-04-06 20:31:30,785 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1816183314] [2022-04-06 20:31:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1816183314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:30,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:31:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898720369] [2022-04-06 20:31:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:30,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:31:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:31:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3031, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:31:30,787 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:33,847 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-04-06 20:31:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:31:33,847 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 20:31:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:33,848 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:31:33,848 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:31:33,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 292 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=435, Invalid=10071, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:31:33,850 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6208 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 6301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:33,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 84 Invalid, 6301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6208 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:31:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:31:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-04-06 20:31:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-04-06 20:31:33,876 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2022-04-06 20:31:33,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:33,877 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-04-06 20:31:33,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-04-06 20:31:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-06 20:31:33,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:33,878 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:33,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:34,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:34,100 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:34,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:34,100 INFO L85 PathProgramCache]: Analyzing trace with hash 207641162, now seen corresponding path program 91 times [2022-04-06 20:31:34,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:34,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909259269] [2022-04-06 20:31:34,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:34,101 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash 207641162, now seen corresponding path program 92 times [2022-04-06 20:31:34,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62758555] [2022-04-06 20:31:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:34,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:35,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62758555] [2022-04-06 20:31:35,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62758555] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:35,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247446399] [2022-04-06 20:31:35,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:31:35,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:35,136 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:35,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:31:35,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:31:35,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:35,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:31:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:37,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3288 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:42,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247446399] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:42,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:42,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53, 51] total 148 [2022-04-06 20:31:42,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:42,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909259269] [2022-04-06 20:31:42,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909259269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:42,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:42,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:31:42,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637371367] [2022-04-06 20:31:42,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:42,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:31:42,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:42,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:31:42,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2736, Invalid=19020, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:31:42,241 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:46,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:46,437 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-04-06 20:31:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:31:46,438 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 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 152 [2022-04-06 20:31:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:46,439 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:31:46,439 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:31:46,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6967 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3016, Invalid=34814, Unknown=0, NotChecked=0, Total=37830 [2022-04-06 20:31:46,442 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6668 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 6763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 6668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:46,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 239 Invalid, 6763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 6668 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:31:46,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:31:46,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-04-06 20:31:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:46,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-04-06 20:31:46,475 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2022-04-06 20:31:46,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:46,475 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-04-06 20:31:46,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-04-06 20:31:46,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:31:46,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:46,476 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:46,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:46,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 20:31:46,676 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1935305118, now seen corresponding path program 93 times [2022-04-06 20:31:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:46,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [48747982] [2022-04-06 20:31:46,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:46,678 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1935305118, now seen corresponding path program 94 times [2022-04-06 20:31:46,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:46,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228000597] [2022-04-06 20:31:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:47,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:31:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:31:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:47,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:31:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228000597] [2022-04-06 20:31:47,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228000597] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:31:47,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165652780] [2022-04-06 20:31:47,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:31:47,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:31:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:31:47,793 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:31:47,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:31:47,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:31:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:31:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 20:31:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:31:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:31:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:31:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 0 proven. 3430 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:31:55,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165652780] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:31:55,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:31:55,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 54, 52] total 151 [2022-04-06 20:31:55,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:31:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [48747982] [2022-04-06 20:31:55,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [48747982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:31:55,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:31:55,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:31:55,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349665404] [2022-04-06 20:31:55,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:31:55,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:31:55,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:31:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2842, Invalid=19808, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:31:55,278 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:31:59,617 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-04-06 20:31:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:31:59,618 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 20:31:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:31:59,618 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:31:59,618 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:31:59,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=3128, Invalid=36274, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:31:59,621 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 6774 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 6871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:31:59,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 94 Invalid, 6871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6774 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:31:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:31:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-04-06 20:31:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-04-06 20:31:59,657 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 155 [2022-04-06 20:31:59,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:31:59,657 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-04-06 20:31:59,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:31:59,657 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-04-06 20:31:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 20:31:59,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:31:59,665 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:31:59,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:31:59,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:31:59,887 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:31:59,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:31:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2054044854, now seen corresponding path program 95 times [2022-04-06 20:31:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:31:59,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163365176] [2022-04-06 20:31:59,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:31:59,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:31:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash -2054044854, now seen corresponding path program 96 times [2022-04-06 20:31:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:31:59,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813344710] [2022-04-06 20:31:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:31:59,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:31:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:00,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813344710] [2022-04-06 20:32:01,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813344710] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643461062] [2022-04-06 20:32:01,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:01,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:01,004 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:01,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:32:01,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:32:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2022-04-06 20:32:01,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2022-04-06 20:32:02,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643461062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:02,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:02,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 7, 7] total 60 [2022-04-06 20:32:02,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:02,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163365176] [2022-04-06 20:32:02,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163365176] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:02,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:02,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:32:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724843323] [2022-04-06 20:32:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:02,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:32:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:32:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3370, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:32:02,198 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:05,708 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-04-06 20:32:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:32:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 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 158 [2022-04-06 20:32:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:05,709 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:32:05,709 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:32:05,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 310 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=462, Invalid=11310, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:32:05,710 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 7060 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 7159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:05,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 94 Invalid, 7159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 7060 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:32:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:32:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-04-06 20:32:05,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-04-06 20:32:05,734 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 158 [2022-04-06 20:32:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:05,735 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-04-06 20:32:05,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:05,735 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-04-06 20:32:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:32:05,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:05,736 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:05,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:05,936 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:05,937 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash -376468126, now seen corresponding path program 97 times [2022-04-06 20:32:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:05,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [506070724] [2022-04-06 20:32:05,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:05,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash -376468126, now seen corresponding path program 98 times [2022-04-06 20:32:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:05,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564633126] [2022-04-06 20:32:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:07,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:07,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564633126] [2022-04-06 20:32:07,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564633126] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:07,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495274617] [2022-04-06 20:32:07,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:07,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:07,098 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:07,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:32:07,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:07,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:32:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:09,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 0 proven. 3723 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:15,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495274617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:15,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:15,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 56, 54] total 157 [2022-04-06 20:32:15,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:15,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [506070724] [2022-04-06 20:32:15,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [506070724] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:15,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:15,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:32:15,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214535241] [2022-04-06 20:32:15,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:15,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:32:15,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:15,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:32:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3060, Invalid=21432, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:32:15,053 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:19,715 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-04-06 20:32:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:32:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 20:32:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:19,716 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:32:19,716 INFO L226 Difference]: Without dead ends: 167 [2022-04-06 20:32:19,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 219 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7861 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=3358, Invalid=39284, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 20:32:19,718 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7280 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:19,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 34 Invalid, 7381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 7280 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:32:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-06 20:32:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-04-06 20:32:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-04-06 20:32:19,748 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 161 [2022-04-06 20:32:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:19,748 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-04-06 20:32:19,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-04-06 20:32:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 20:32:19,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:19,749 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:19,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:32:19,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:32:19,958 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash 72379466, now seen corresponding path program 99 times [2022-04-06 20:32:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:19,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [161935712] [2022-04-06 20:32:19,959 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:19,959 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 72379466, now seen corresponding path program 100 times [2022-04-06 20:32:19,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:19,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760406047] [2022-04-06 20:32:19,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:19,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:21,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:21,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:21,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760406047] [2022-04-06 20:32:21,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760406047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:21,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542668948] [2022-04-06 20:32:21,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:21,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:21,254 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:21,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:32:21,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:21,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:32:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:26,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542668948] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:26,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:26,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 54] total 107 [2022-04-06 20:32:26,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:26,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [161935712] [2022-04-06 20:32:26,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [161935712] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:26,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:26,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:32:26,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535823413] [2022-04-06 20:32:26,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:26,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:32:26,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:26,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:32:26,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2967, Invalid=8375, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:32:26,696 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:30,209 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-04-06 20:32:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:32:30,210 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 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 164 [2022-04-06 20:32:30,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:30,210 INFO L225 Difference]: With dead ends: 178 [2022-04-06 20:32:30,210 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:32:30,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5923, Invalid=18883, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:32:30,212 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 7656 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 7759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:30,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 99 Invalid, 7759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7656 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:32:30,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:32:30,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-04-06 20:32:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-04-06 20:32:30,237 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 164 [2022-04-06 20:32:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:30,237 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-04-06 20:32:30,237 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-04-06 20:32:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:32:30,238 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:30,238 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:30,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:32:30,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:30,438 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1457800290, now seen corresponding path program 101 times [2022-04-06 20:32:30,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:30,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81803936] [2022-04-06 20:32:30,440 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:30,440 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1457800290, now seen corresponding path program 102 times [2022-04-06 20:32:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:30,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392116388] [2022-04-06 20:32:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 103 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:31,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392116388] [2022-04-06 20:32:31,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392116388] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:31,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752574580] [2022-04-06 20:32:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:32:31,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:31,689 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:31,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:32:31,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:32:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:31,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:32:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2022-04-06 20:32:32,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 1785 proven. 103 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-04-06 20:32:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752574580] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:33,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 7, 8] total 64 [2022-04-06 20:32:33,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:33,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81803936] [2022-04-06 20:32:33,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81803936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:33,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:33,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:32:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242402573] [2022-04-06 20:32:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:33,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:32:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:32:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3848, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:32:33,055 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:36,848 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-04-06 20:32:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:32:36,849 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 20:32:36,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:36,849 INFO L225 Difference]: With dead ends: 181 [2022-04-06 20:32:36,849 INFO L226 Difference]: Without dead ends: 173 [2022-04-06 20:32:36,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 327 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=494, Invalid=12846, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:32:36,850 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 7924 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 8029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 7924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:36,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 69 Invalid, 8029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 7924 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:32:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-04-06 20:32:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-04-06 20:32:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0179640718562875) internal successors, (170), 167 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2022-04-06 20:32:36,876 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 167 [2022-04-06 20:32:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:36,877 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2022-04-06 20:32:36,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2022-04-06 20:32:36,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-06 20:32:36,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:36,877 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:36,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:32:37,078 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 20:32:37,078 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash -106146486, now seen corresponding path program 103 times [2022-04-06 20:32:37,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:37,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1503165318] [2022-04-06 20:32:37,080 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:37,080 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:37,080 INFO L85 PathProgramCache]: Analyzing trace with hash -106146486, now seen corresponding path program 104 times [2022-04-06 20:32:37,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783278234] [2022-04-06 20:32:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:37,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:38,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:38,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783278234] [2022-04-06 20:32:38,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783278234] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:38,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698192513] [2022-04-06 20:32:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:32:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:38,338 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:38,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:32:38,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:32:38,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:38,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 20:32:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:41,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:32:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 0 proven. 4185 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:32:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698192513] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:32:47,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:32:47,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 59, 57] total 166 [2022-04-06 20:32:47,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:32:47,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1503165318] [2022-04-06 20:32:47,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1503165318] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:32:47,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:32:47,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:32:47,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977154814] [2022-04-06 20:32:47,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:32:47,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:32:47,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:47,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:32:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3402, Invalid=23988, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:32:47,205 INFO L87 Difference]: Start difference. First operand 172 states and 174 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:32:52,535 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-04-06 20:32:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:32:52,536 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 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 170 [2022-04-06 20:32:52,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:32:52,536 INFO L225 Difference]: With dead ends: 184 [2022-04-06 20:32:52,536 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 20:32:52,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8809 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3718, Invalid=44024, Unknown=0, NotChecked=0, Total=47742 [2022-04-06 20:32:52,538 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 8474 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 8581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 8474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:32:52,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 269 Invalid, 8581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 8474 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:32:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 20:32:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-04-06 20:32:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2022-04-06 20:32:52,568 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2022-04-06 20:32:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:32:52,568 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2022-04-06 20:32:52,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:32:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2022-04-06 20:32:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:32:52,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:32:52,569 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:32:52,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 20:32:52,769 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:32:52,769 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:32:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:32:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash 160676706, now seen corresponding path program 105 times [2022-04-06 20:32:52,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:32:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673772226] [2022-04-06 20:32:52,771 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:32:52,771 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:32:52,772 INFO L85 PathProgramCache]: Analyzing trace with hash 160676706, now seen corresponding path program 106 times [2022-04-06 20:32:52,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:32:52,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825486179] [2022-04-06 20:32:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:32:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:32:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:32:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:32:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:54,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:32:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825486179] [2022-04-06 20:32:54,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825486179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:32:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971722375] [2022-04-06 20:32:54,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:32:54,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:32:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:32:54,119 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:32:54,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:32:54,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:32:54,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:32:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 20:32:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:32:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:32:57,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 0 proven. 4345 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:03,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971722375] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:03,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:03,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 60, 58] total 169 [2022-04-06 20:33:03,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:03,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1673772226] [2022-04-06 20:33:03,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1673772226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:03,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:03,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:33:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356005576] [2022-04-06 20:33:03,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:03,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:33:03,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:33:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3520, Invalid=24872, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:33:03,499 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:09,030 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-04-06 20:33:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:33:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 20:33:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:09,031 INFO L225 Difference]: With dead ends: 187 [2022-04-06 20:33:09,031 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 20:33:09,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9137 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=3842, Invalid=45664, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:33:09,034 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8628 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 8737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 8628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:09,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 134 Invalid, 8737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 8628 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:33:09,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 20:33:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-04-06 20:33:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2022-04-06 20:33:09,064 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 173 [2022-04-06 20:33:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:09,065 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2022-04-06 20:33:09,065 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2022-04-06 20:33:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 20:33:09,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:09,066 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:09,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:09,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:09,266 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash -894075318, now seen corresponding path program 107 times [2022-04-06 20:33:09,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:09,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299505959] [2022-04-06 20:33:09,268 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:09,268 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:09,268 INFO L85 PathProgramCache]: Analyzing trace with hash -894075318, now seen corresponding path program 108 times [2022-04-06 20:33:09,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:09,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502658116] [2022-04-06 20:33:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:09,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:10,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502658116] [2022-04-06 20:33:10,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502658116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:10,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175777403] [2022-04-06 20:33:10,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:10,679 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:10,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:33:10,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:10,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:33:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2022-04-06 20:33:11,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4401 trivial. 0 not checked. [2022-04-06 20:33:12,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175777403] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:12,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:12,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 7, 7] total 66 [2022-04-06 20:33:12,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299505959] [2022-04-06 20:33:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299505959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:12,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:12,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:33:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755675941] [2022-04-06 20:33:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:12,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:33:12,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:33:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4102, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:33:12,049 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:16,262 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-04-06 20:33:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:33:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 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 176 [2022-04-06 20:33:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:16,263 INFO L225 Difference]: With dead ends: 190 [2022-04-06 20:33:16,263 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 20:33:16,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 346 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=516, Invalid=14004, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:33:16,264 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 8992 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 9103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 8992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:16,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 169 Invalid, 9103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 8992 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 20:33:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 20:33:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-04-06 20:33:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0170454545454546) internal successors, (179), 176 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2022-04-06 20:33:16,298 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 176 [2022-04-06 20:33:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:16,298 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2022-04-06 20:33:16,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2022-04-06 20:33:16,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:33:16,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:16,299 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:16,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:16,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:16,521 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:16,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1030884766, now seen corresponding path program 109 times [2022-04-06 20:33:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:16,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1019105342] [2022-04-06 20:33:16,523 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:16,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1030884766, now seen corresponding path program 110 times [2022-04-06 20:33:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:16,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613344251] [2022-04-06 20:33:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:17,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 111 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613344251] [2022-04-06 20:33:17,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613344251] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026803091] [2022-04-06 20:33:17,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:17,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:17,927 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:17,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:33:17,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:17,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:17,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 20:33:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:21,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4674 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:33:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026803091] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:27,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:27,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 62, 60] total 175 [2022-04-06 20:33:27,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:27,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1019105342] [2022-04-06 20:33:27,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1019105342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:27,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:27,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:33:27,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482550859] [2022-04-06 20:33:27,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:27,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:33:27,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:33:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3762, Invalid=26688, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:33:27,823 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:33,763 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2022-04-06 20:33:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:33:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 20:33:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:33,764 INFO L225 Difference]: With dead ends: 193 [2022-04-06 20:33:33,764 INFO L226 Difference]: Without dead ends: 185 [2022-04-06 20:33:33,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 243 SyntacticMatches, 3 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9811 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=4096, Invalid=49034, Unknown=0, NotChecked=0, Total=53130 [2022-04-06 20:33:33,766 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 9350 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 9463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:33,766 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 194 Invalid, 9463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9350 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:33:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-04-06 20:33:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-04-06 20:33:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0167597765363128) internal successors, (182), 179 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2022-04-06 20:33:33,808 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 179 [2022-04-06 20:33:33,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:33,808 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2022-04-06 20:33:33,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2022-04-06 20:33:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 20:33:33,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:33,810 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:33,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 20:33:34,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:34,023 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:34,024 INFO L85 PathProgramCache]: Analyzing trace with hash -797186230, now seen corresponding path program 111 times [2022-04-06 20:33:34,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:34,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329704884] [2022-04-06 20:33:34,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:34,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:34,025 INFO L85 PathProgramCache]: Analyzing trace with hash -797186230, now seen corresponding path program 112 times [2022-04-06 20:33:34,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:34,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523295359] [2022-04-06 20:33:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:34,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:35,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:35,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523295359] [2022-04-06 20:33:35,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523295359] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:35,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544583194] [2022-04-06 20:33:35,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:33:35,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:35,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:35,471 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:35,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:33:35,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:33:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 119 conjunts are in the unsatisfiable core [2022-04-06 20:33:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:44,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544583194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:44,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:44,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 62] total 122 [2022-04-06 20:33:44,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329704884] [2022-04-06 20:33:44,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329704884] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:44,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:44,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:33:44,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675736756] [2022-04-06 20:33:44,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:44,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:33:44,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:44,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:33:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3724, Invalid=11038, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:33:44,234 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:48,721 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-04-06 20:33:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:33:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 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 182 [2022-04-06 20:33:48,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:48,722 INFO L225 Difference]: With dead ends: 196 [2022-04-06 20:33:48,722 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 20:33:48,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 304 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=7370, Invalid=24492, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 20:33:48,724 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9792 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 9907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:48,724 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 284 Invalid, 9907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9792 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:33:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 20:33:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-04-06 20:33:48,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-04-06 20:33:48,758 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 182 [2022-04-06 20:33:48,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:48,758 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-04-06 20:33:48,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-04-06 20:33:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:33:48,759 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:48,759 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:48,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:33:48,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 20:33:48,959 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -826087070, now seen corresponding path program 113 times [2022-04-06 20:33:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434502858] [2022-04-06 20:33:48,961 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:48,961 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -826087070, now seen corresponding path program 114 times [2022-04-06 20:33:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:48,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955632181] [2022-04-06 20:33:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:50,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 115 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955632181] [2022-04-06 20:33:50,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955632181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605879773] [2022-04-06 20:33:50,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:33:50,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:50,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:50,457 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:50,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:33:50,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:33:50,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:50,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:33:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:33:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4902 trivial. 0 not checked. [2022-04-06 20:33:51,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:33:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 2223 proven. 115 refuted. 0 times theorem prover too weak. 2679 trivial. 0 not checked. [2022-04-06 20:33:52,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605879773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:33:52,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:33:52,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 7, 8] total 70 [2022-04-06 20:33:52,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:33:52,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434502858] [2022-04-06 20:33:52,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434502858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:33:52,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:33:52,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:33:52,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675069169] [2022-04-06 20:33:52,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:33:52,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:33:52,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:33:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4628, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:33:52,074 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:33:56,861 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-04-06 20:33:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:33:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 20:33:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:33:56,862 INFO L225 Difference]: With dead ends: 199 [2022-04-06 20:33:56,862 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 20:33:56,863 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=548, Invalid=15708, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:33:56,864 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9838 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:33:56,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 39 Invalid, 9955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9838 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:33:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 20:33:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-04-06 20:33:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0162162162162163) internal successors, (188), 185 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2022-04-06 20:33:56,901 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 185 [2022-04-06 20:33:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:33:56,901 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2022-04-06 20:33:56,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:33:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2022-04-06 20:33:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 20:33:56,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:33:56,902 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:33:56,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:33:57,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:33:57,103 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:33:57,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:33:57,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1477414986, now seen corresponding path program 115 times [2022-04-06 20:33:57,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:33:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919975326] [2022-04-06 20:33:57,104 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:33:57,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:33:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1477414986, now seen corresponding path program 116 times [2022-04-06 20:33:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:33:57,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170933169] [2022-04-06 20:33:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:33:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:33:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:58,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:33:58,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:33:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 117 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:33:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:33:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170933169] [2022-04-06 20:33:58,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170933169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:33:58,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112241781] [2022-04-06 20:33:58,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:33:58,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:33:58,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:33:58,708 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:33:58,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:33:58,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:33:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:33:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 20:33:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:02,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:09,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112241781] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:09,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:09,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 65, 63] total 184 [2022-04-06 20:34:09,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:09,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919975326] [2022-04-06 20:34:09,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919975326] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:09,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:09,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:34:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395471585] [2022-04-06 20:34:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:09,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:34:09,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:09,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:34:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4140, Invalid=29532, Unknown=0, NotChecked=0, Total=33672 [2022-04-06 20:34:09,475 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:15,939 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-04-06 20:34:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:34:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 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 188 [2022-04-06 20:34:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:15,940 INFO L225 Difference]: With dead ends: 202 [2022-04-06 20:34:15,940 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 20:34:15,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 255 SyntacticMatches, 3 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10867 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=4492, Invalid=54314, Unknown=0, NotChecked=0, Total=58806 [2022-04-06 20:34:15,942 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 10262 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 10381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:15,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 104 Invalid, 10381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10262 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:34:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 20:34:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-04-06 20:34:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0159574468085106) internal successors, (191), 188 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-04-06 20:34:15,992 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 188 [2022-04-06 20:34:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:15,992 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-04-06 20:34:15,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:15,993 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-04-06 20:34:15,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:34:15,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:15,993 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:16,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 20:34:16,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:16,194 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 119709794, now seen corresponding path program 117 times [2022-04-06 20:34:16,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973751668] [2022-04-06 20:34:16,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:16,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash 119709794, now seen corresponding path program 118 times [2022-04-06 20:34:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059221798] [2022-04-06 20:34:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:16,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:17,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059221798] [2022-04-06 20:34:17,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059221798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:17,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409711075] [2022-04-06 20:34:17,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:34:17,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:17,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:17,757 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:17,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:34:18,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:34:18,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 125 conjunts are in the unsatisfiable core [2022-04-06 20:34:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:18,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:27,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 0 proven. 5370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:27,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409711075] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:27,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:27,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 65] total 128 [2022-04-06 20:34:27,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:27,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973751668] [2022-04-06 20:34:27,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973751668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:27,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:27,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:34:27,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595619619] [2022-04-06 20:34:27,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:27,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:34:27,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:27,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:34:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4099, Invalid=12157, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:34:27,550 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:32,418 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-04-06 20:34:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:34:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 20:34:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:32,419 INFO L225 Difference]: With dead ends: 205 [2022-04-06 20:34:32,419 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 20:34:32,421 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=8117, Invalid=27039, Unknown=0, NotChecked=0, Total=35156 [2022-04-06 20:34:32,421 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 10584 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 10584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:32,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 79 Invalid, 10705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 10584 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:34:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 20:34:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-04-06 20:34:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0157068062827226) internal successors, (194), 191 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2022-04-06 20:34:32,455 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 191 [2022-04-06 20:34:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:32,455 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2022-04-06 20:34:32,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2022-04-06 20:34:32,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 20:34:32,456 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:32,456 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:32,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:34:32,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:32,657 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1568638646, now seen corresponding path program 119 times [2022-04-06 20:34:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:32,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [878870885] [2022-04-06 20:34:32,658 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:32,658 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:32,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1568638646, now seen corresponding path program 120 times [2022-04-06 20:34:32,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774166317] [2022-04-06 20:34:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:32,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:34,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 121 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:34,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774166317] [2022-04-06 20:34:34,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774166317] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126078204] [2022-04-06 20:34:34,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:34:34,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:34,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:34,254 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:34,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:34:34,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:34:34,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:34,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:34:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2022-04-06 20:34:35,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5430 trivial. 0 not checked. [2022-04-06 20:34:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126078204] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:35,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:35,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7, 7] total 72 [2022-04-06 20:34:35,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:35,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [878870885] [2022-04-06 20:34:35,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [878870885] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:35,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:35,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:34:35,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636452737] [2022-04-06 20:34:35,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:35,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:34:35,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:35,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:34:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4906, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:34:35,692 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:34:40,834 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-04-06 20:34:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:34:40,835 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 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 194 [2022-04-06 20:34:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:34:40,835 INFO L225 Difference]: With dead ends: 208 [2022-04-06 20:34:40,836 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 20:34:40,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=570, Invalid=16986, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:34:40,837 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 10960 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 11083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 10960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:34:40,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 94 Invalid, 11083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 10960 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:34:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 20:34:40,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-04-06 20:34:40,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-04-06 20:34:40,893 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2022-04-06 20:34:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:34:40,893 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-04-06 20:34:40,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:34:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-04-06 20:34:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:34:40,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:34:40,895 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:34:40,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 20:34:41,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:41,114 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:34:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:34:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash -795011230, now seen corresponding path program 121 times [2022-04-06 20:34:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:41,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1225429405] [2022-04-06 20:34:41,116 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:34:41,116 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:34:41,116 INFO L85 PathProgramCache]: Analyzing trace with hash -795011230, now seen corresponding path program 122 times [2022-04-06 20:34:41,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:34:41,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772741919] [2022-04-06 20:34:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:34:41,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:34:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:42,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:34:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:34:42,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 123 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:42,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:34:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772741919] [2022-04-06 20:34:42,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772741919] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:34:42,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660341805] [2022-04-06 20:34:42,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:34:42,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:34:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:34:42,787 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:34:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:34:42,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:34:42,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:34:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:34:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:34:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:34:47,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:34:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5733 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:34:54,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660341805] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:34:54,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:34:54,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 68, 66] total 193 [2022-04-06 20:34:54,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:34:54,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1225429405] [2022-04-06 20:34:54,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1225429405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:34:54,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:34:54,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:34:54,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892022860] [2022-04-06 20:34:54,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:34:54,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:34:54,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:34:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:34:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4536, Invalid=32520, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:34:54,665 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:01,871 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-04-06 20:35:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:35:01,871 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 20:35:01,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:01,872 INFO L225 Difference]: With dead ends: 211 [2022-04-06 20:35:01,872 INFO L226 Difference]: Without dead ends: 203 [2022-04-06 20:35:01,874 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 267 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11977 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=4906, Invalid=59864, Unknown=0, NotChecked=0, Total=64770 [2022-04-06 20:35:01,875 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 11600 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 11725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 11600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:01,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 324 Invalid, 11725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 11600 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:35:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-06 20:35:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-04-06 20:35:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.015228426395939) internal successors, (200), 197 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-04-06 20:35:01,913 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 197 [2022-04-06 20:35:01,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:01,913 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-04-06 20:35:01,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-04-06 20:35:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-04-06 20:35:01,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:01,914 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:01,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:02,136 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:02,136 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash -455171510, now seen corresponding path program 123 times [2022-04-06 20:35:02,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:02,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [303555347] [2022-04-06 20:35:02,138 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:02,138 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash -455171510, now seen corresponding path program 124 times [2022-04-06 20:35:02,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:02,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494097370] [2022-04-06 20:35:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:02,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:03,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 125 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:03,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494097370] [2022-04-06 20:35:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494097370] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383592625] [2022-04-06 20:35:03,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:03,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:03,843 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:03,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:35:04,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:04,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 20:35:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:08,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5920 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:16,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383592625] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:16,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:16,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 69, 67] total 196 [2022-04-06 20:35:16,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:16,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [303555347] [2022-04-06 20:35:16,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [303555347] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:16,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:16,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:35:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749359762] [2022-04-06 20:35:16,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:16,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:35:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:35:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4672, Invalid=33548, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 20:35:16,236 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:23,620 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-04-06 20:35:23,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:35:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 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 200 [2022-04-06 20:35:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:23,621 INFO L225 Difference]: With dead ends: 214 [2022-04-06 20:35:23,621 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 20:35:23,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 271 SyntacticMatches, 3 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12359 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=5048, Invalid=61774, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 20:35:23,624 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 11784 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 11911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 11784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:23,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 169 Invalid, 11911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 11784 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:35:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 20:35:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-04-06 20:35:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.015) internal successors, (203), 200 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2022-04-06 20:35:23,676 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 200 [2022-04-06 20:35:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:23,676 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2022-04-06 20:35:23,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2022-04-06 20:35:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:35:23,677 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:23,677 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:23,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:23,877 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:35:23,877 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:23,878 INFO L85 PathProgramCache]: Analyzing trace with hash 472010338, now seen corresponding path program 125 times [2022-04-06 20:35:23,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:23,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874504255] [2022-04-06 20:35:23,879 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:23,879 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:23,879 INFO L85 PathProgramCache]: Analyzing trace with hash 472010338, now seen corresponding path program 126 times [2022-04-06 20:35:23,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:23,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287161432] [2022-04-06 20:35:23,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:23,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 127 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:25,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287161432] [2022-04-06 20:35:25,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287161432] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:25,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199848937] [2022-04-06 20:35:25,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:35:25,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:25,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:25,672 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:25,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:35:25,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:35:25,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:35:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 5985 trivial. 0 not checked. [2022-04-06 20:35:26,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 2709 proven. 127 refuted. 0 times theorem prover too weak. 3276 trivial. 0 not checked. [2022-04-06 20:35:27,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199848937] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:27,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:27,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 7, 8] total 76 [2022-04-06 20:35:27,336 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:27,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874504255] [2022-04-06 20:35:27,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874504255] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:27,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:27,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:35:27,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164521441] [2022-04-06 20:35:27,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:27,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:35:27,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:35:27,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5480, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:35:27,337 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:32,987 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2022-04-06 20:35:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:35:32,987 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 20:35:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:32,988 INFO L225 Difference]: With dead ends: 217 [2022-04-06 20:35:32,988 INFO L226 Difference]: Without dead ends: 209 [2022-04-06 20:35:32,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 399 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=602, Invalid=18858, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:35:32,989 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 12220 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 12349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 12220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:32,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 219 Invalid, 12349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 12220 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:35:32,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-06 20:35:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-04-06 20:35:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 210 transitions. [2022-04-06 20:35:33,039 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 210 transitions. Word has length 203 [2022-04-06 20:35:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:33,040 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 210 transitions. [2022-04-06 20:35:33,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 210 transitions. [2022-04-06 20:35:33,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 20:35:33,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:33,041 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:33,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:33,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:33,263 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1211763530, now seen corresponding path program 127 times [2022-04-06 20:35:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:33,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016870780] [2022-04-06 20:35:33,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:33,264 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:33,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1211763530, now seen corresponding path program 128 times [2022-04-06 20:35:33,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306003059] [2022-04-06 20:35:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:35,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:35,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306003059] [2022-04-06 20:35:35,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306003059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:35,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135524570] [2022-04-06 20:35:35,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:35:35,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:35,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:35,095 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:35:35,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:35:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 20:35:35,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:39,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:35:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 0 proven. 6303 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:35:48,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135524570] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:35:48,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:35:48,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 71, 69] total 202 [2022-04-06 20:35:48,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:35:48,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016870780] [2022-04-06 20:35:48,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016870780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:35:48,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:35:48,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:35:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055327658] [2022-04-06 20:35:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:35:48,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:35:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:35:48,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=35652, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 20:35:48,061 INFO L87 Difference]: Start difference. First operand 208 states and 210 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:35:55,936 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-04-06 20:35:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:35:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 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 206 [2022-04-06 20:35:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:35:55,937 INFO L225 Difference]: With dead ends: 220 [2022-04-06 20:35:55,937 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 20:35:55,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13141 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=5338, Invalid=65684, Unknown=0, NotChecked=0, Total=71022 [2022-04-06 20:35:55,941 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 12668 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 12799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 12668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:35:55,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 274 Invalid, 12799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 12668 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:35:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 20:35:55,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-04-06 20:35:56,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2022-04-06 20:35:56,000 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 206 [2022-04-06 20:35:56,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:35:56,000 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2022-04-06 20:35:56,001 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:35:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2022-04-06 20:35:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:35:56,001 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:35:56,002 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:35:56,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:35:56,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 20:35:56,215 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:35:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:35:56,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1721910626, now seen corresponding path program 129 times [2022-04-06 20:35:56,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:35:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697296563] [2022-04-06 20:35:56,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:35:56,216 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:35:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1721910626, now seen corresponding path program 130 times [2022-04-06 20:35:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:35:56,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100127289] [2022-04-06 20:35:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:35:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:35:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:35:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:35:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:35:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100127289] [2022-04-06 20:35:58,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100127289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:35:58,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203820602] [2022-04-06 20:35:58,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:35:58,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:35:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:35:58,106 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:35:58,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:35:58,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:35:58,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:35:58,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 137 conjunts are in the unsatisfiable core [2022-04-06 20:35:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:35:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:35:58,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 0 proven. 6501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:09,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203820602] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:09,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:09,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 71] total 140 [2022-04-06 20:36:09,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697296563] [2022-04-06 20:36:09,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697296563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:09,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:09,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:36:09,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633605763] [2022-04-06 20:36:09,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:09,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:36:09,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:09,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:36:09,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4903, Invalid=14557, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:36:09,143 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:15,058 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-04-06 20:36:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:36:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 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 209 [2022-04-06 20:36:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:15,059 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:36:15,059 INFO L226 Difference]: Without dead ends: 215 [2022-04-06 20:36:15,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 349 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=9719, Invalid=32511, Unknown=0, NotChecked=0, Total=42230 [2022-04-06 20:36:15,061 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 12948 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 13081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 12948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:15,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 184 Invalid, 13081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 12948 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 20:36:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-04-06 20:36:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-04-06 20:36:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.014354066985646) internal successors, (212), 209 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2022-04-06 20:36:15,122 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 209 [2022-04-06 20:36:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:15,122 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2022-04-06 20:36:15,122 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2022-04-06 20:36:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-06 20:36:15,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:15,123 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:15,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 20:36:15,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:36:15,346 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -375212982, now seen corresponding path program 131 times [2022-04-06 20:36:15,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971061291] [2022-04-06 20:36:15,348 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:15,348 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash -375212982, now seen corresponding path program 132 times [2022-04-06 20:36:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:15,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60832593] [2022-04-06 20:36:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:17,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 133 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:17,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60832593] [2022-04-06 20:36:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60832593] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578476444] [2022-04-06 20:36:17,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:36:17,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:17,242 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:17,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:36:17,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:36:17,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:17,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:36:17,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 6567 trivial. 0 not checked. [2022-04-06 20:36:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 6567 trivial. 0 not checked. [2022-04-06 20:36:18,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578476444] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:18,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:18,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 7, 7] total 78 [2022-04-06 20:36:18,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:18,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971061291] [2022-04-06 20:36:18,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971061291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:18,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:18,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:36:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361141811] [2022-04-06 20:36:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:18,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:36:18,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:36:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5782, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:36:18,786 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:24,925 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-04-06 20:36:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:36:24,925 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 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 212 [2022-04-06 20:36:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:24,926 INFO L225 Difference]: With dead ends: 226 [2022-04-06 20:36:24,926 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 20:36:24,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 418 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=624, Invalid=20256, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:36:24,927 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 13228 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 13363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 13228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:24,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 89 Invalid, 13363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 13228 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 20:36:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 20:36:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-04-06 20:36:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-04-06 20:36:24,982 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 212 [2022-04-06 20:36:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:24,982 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-04-06 20:36:24,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-04-06 20:36:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:36:24,983 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:24,983 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:24,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:36:25,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:36:25,184 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:25,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:25,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1190331294, now seen corresponding path program 133 times [2022-04-06 20:36:25,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:25,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126376498] [2022-04-06 20:36:25,185 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:25,185 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:25,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1190331294, now seen corresponding path program 134 times [2022-04-06 20:36:25,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:25,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677689790] [2022-04-06 20:36:25,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:25,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:27,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:27,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677689790] [2022-04-06 20:36:27,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677689790] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:27,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787519008] [2022-04-06 20:36:27,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:36:27,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:27,134 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:27,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:36:27,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:36:27,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 145 conjunts are in the unsatisfiable core [2022-04-06 20:36:27,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:36:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 0 proven. 6900 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:36:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787519008] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:36:41,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:36:41,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 74, 72] total 211 [2022-04-06 20:36:41,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:36:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126376498] [2022-04-06 20:36:41,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126376498] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:36:41,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:36:41,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:36:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268803394] [2022-04-06 20:36:41,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:36:41,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:36:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:36:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5382, Invalid=38928, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:36:41,285 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:36:50,099 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-04-06 20:36:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:36:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 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 215 [2022-04-06 20:36:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:36:50,101 INFO L225 Difference]: With dead ends: 229 [2022-04-06 20:36:50,101 INFO L226 Difference]: Without dead ends: 221 [2022-04-06 20:36:50,104 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14359 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=5788, Invalid=71774, Unknown=0, NotChecked=0, Total=77562 [2022-04-06 20:36:50,105 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 13886 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 14023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 13886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:36:50,105 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 304 Invalid, 14023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 13886 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-04-06 20:36:50,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-04-06 20:36:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-04-06 20:36:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.013953488372093) internal successors, (218), 215 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2022-04-06 20:36:50,188 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 215 [2022-04-06 20:36:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:36:50,188 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2022-04-06 20:36:50,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:36:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2022-04-06 20:36:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-04-06 20:36:50,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:36:50,190 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:36:50,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:36:50,414 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:36:50,414 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:36:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:36:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -634872502, now seen corresponding path program 135 times [2022-04-06 20:36:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:36:50,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [478212941] [2022-04-06 20:36:50,416 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:36:50,416 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:36:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash -634872502, now seen corresponding path program 136 times [2022-04-06 20:36:50,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:36:50,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297212849] [2022-04-06 20:36:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:36:50,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:36:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:36:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:36:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:52,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:36:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297212849] [2022-04-06 20:36:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297212849] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:36:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902908402] [2022-04-06 20:36:52,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:36:52,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:36:52,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:36:52,566 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:36:52,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:36:52,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:36:52,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:36:52,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 147 conjunts are in the unsatisfiable core [2022-04-06 20:36:52,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:36:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:36:57,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 0 proven. 7105 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902908402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:07,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:07,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 75, 73] total 214 [2022-04-06 20:37:07,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [478212941] [2022-04-06 20:37:07,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [478212941] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:07,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:07,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:37:07,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150597556] [2022-04-06 20:37:07,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:07,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:37:07,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:07,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:37:07,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5530, Invalid=40052, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 20:37:07,225 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:16,197 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-04-06 20:37:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:37:16,198 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 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 218 [2022-04-06 20:37:16,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:16,198 INFO L225 Difference]: With dead ends: 232 [2022-04-06 20:37:16,198 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 20:37:16,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14777 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=5942, Invalid=73864, Unknown=0, NotChecked=0, Total=79806 [2022-04-06 20:37:16,201 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 216 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 14328 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 14467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 14328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:16,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 334 Invalid, 14467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 14328 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:37:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 20:37:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-04-06 20:37:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2022-04-06 20:37:16,266 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2022-04-06 20:37:16,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:16,267 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2022-04-06 20:37:16,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2022-04-06 20:37:16,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:37:16,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:16,268 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:16,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:16,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:16,472 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:16,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1470991518, now seen corresponding path program 137 times [2022-04-06 20:37:16,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:16,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1246997692] [2022-04-06 20:37:16,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:16,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1470991518, now seen corresponding path program 138 times [2022-04-06 20:37:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858656787] [2022-04-06 20:37:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:16,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:18,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858656787] [2022-04-06 20:37:18,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858656787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580520740] [2022-04-06 20:37:18,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:37:18,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:18,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:18,539 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:18,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:37:18,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:37:18,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:37:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-06 20:37:19,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 7176 trivial. 0 not checked. [2022-04-06 20:37:20,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580520740] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:20,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:20,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 7, 7] total 81 [2022-04-06 20:37:20,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:20,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1246997692] [2022-04-06 20:37:20,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1246997692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:20,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:20,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:37:20,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727854789] [2022-04-06 20:37:20,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:20,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:37:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:37:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6247, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:37:20,157 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:26,931 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-04-06 20:37:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:37:26,931 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-04-06 20:37:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:26,932 INFO L225 Difference]: With dead ends: 235 [2022-04-06 20:37:26,932 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 20:37:26,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 436 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2427 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=651, Invalid=21999, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:37:26,933 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 14572 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 14713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 14572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:26,933 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 194 Invalid, 14713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 14572 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:37:26,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 20:37:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-04-06 20:37:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0135746606334841) internal successors, (224), 221 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2022-04-06 20:37:26,979 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 221 [2022-04-06 20:37:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:26,979 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2022-04-06 20:37:26,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2022-04-06 20:37:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-06 20:37:26,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:26,980 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:26,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:27,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:27,184 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:27,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:27,184 INFO L85 PathProgramCache]: Analyzing trace with hash 517719626, now seen corresponding path program 139 times [2022-04-06 20:37:27,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:27,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987040707] [2022-04-06 20:37:27,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:27,186 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:27,186 INFO L85 PathProgramCache]: Analyzing trace with hash 517719626, now seen corresponding path program 140 times [2022-04-06 20:37:27,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:27,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440818880] [2022-04-06 20:37:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:27,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:29,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 141 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440818880] [2022-04-06 20:37:29,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440818880] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:29,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789859976] [2022-04-06 20:37:29,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:37:29,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:29,324 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:29,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:37:29,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:37:29,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 151 conjunts are in the unsatisfiable core [2022-04-06 20:37:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:37:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:34,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:37:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7524 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:37:44,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789859976] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:37:44,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:37:44,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 77, 75] total 220 [2022-04-06 20:37:44,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:37:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987040707] [2022-04-06 20:37:44,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987040707] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:37:44,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:37:44,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:37:44,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987430064] [2022-04-06 20:37:44,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:37:44,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:37:44,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:37:44,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5832, Invalid=42348, Unknown=0, NotChecked=0, Total=48180 [2022-04-06 20:37:44,675 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:37:54,102 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-04-06 20:37:54,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:37:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 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 224 [2022-04-06 20:37:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:37:54,103 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:37:54,103 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:37:54,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 303 SyntacticMatches, 3 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15631 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=6256, Invalid=78134, Unknown=0, NotChecked=0, Total=84390 [2022-04-06 20:37:54,106 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 15110 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 15253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 15110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:37:54,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 294 Invalid, 15253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 15110 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-04-06 20:37:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:37:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-04-06 20:37:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0133928571428572) internal successors, (227), 224 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2022-04-06 20:37:54,187 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 224 [2022-04-06 20:37:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:37:54,187 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2022-04-06 20:37:54,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:37:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2022-04-06 20:37:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:37:54,188 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:37:54,188 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:37:54,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 20:37:54,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:54,404 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:37:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:37:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1432529506, now seen corresponding path program 141 times [2022-04-06 20:37:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:37:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536182718] [2022-04-06 20:37:54,406 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:37:54,406 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:37:54,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1432529506, now seen corresponding path program 142 times [2022-04-06 20:37:54,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:37:54,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326630942] [2022-04-06 20:37:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:37:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:37:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:37:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:37:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:37:56,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:37:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326630942] [2022-04-06 20:37:56,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326630942] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:37:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872534382] [2022-04-06 20:37:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:37:56,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:37:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:37:56,550 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:37:56,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:37:56,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:37:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:37:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 157 conjunts are in the unsatisfiable core [2022-04-06 20:37:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:02,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 2 proven. 7738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872534382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:21,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:21,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 79] total 225 [2022-04-06 20:38:21,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536182718] [2022-04-06 20:38:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536182718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:21,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:21,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:38:21,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656478242] [2022-04-06 20:38:21,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:21,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:38:21,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:21,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:38:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11398, Invalid=39002, Unknown=0, NotChecked=0, Total=50400 [2022-04-06 20:38:21,759 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:28,987 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-04-06 20:38:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:38:28,987 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 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 227 [2022-04-06 20:38:28,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:28,988 INFO L225 Difference]: With dead ends: 241 [2022-04-06 20:38:28,988 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 20:38:28,991 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21537 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=17084, Invalid=70828, Unknown=0, NotChecked=0, Total=87912 [2022-04-06 20:38:28,991 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 15402 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 15547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 15402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:28,991 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 184 Invalid, 15547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 15402 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:38:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 20:38:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-04-06 20:38:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.013215859030837) internal successors, (230), 227 states have internal predecessors, (230), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2022-04-06 20:38:29,055 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 227 [2022-04-06 20:38:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:29,057 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2022-04-06 20:38:29,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:29,057 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2022-04-06 20:38:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-04-06 20:38:29,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:29,058 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:29,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:38:29,280 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 20:38:29,280 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:29,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1328795830, now seen corresponding path program 143 times [2022-04-06 20:38:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:29,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127782779] [2022-04-06 20:38:29,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:29,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1328795830, now seen corresponding path program 144 times [2022-04-06 20:38:29,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:29,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421997087] [2022-04-06 20:38:29,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:29,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:31,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 145 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:31,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421997087] [2022-04-06 20:38:31,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421997087] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:31,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734904867] [2022-04-06 20:38:31,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:38:31,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:31,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:31,514 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:31,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:38:31,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:38:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:38:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 7740 trivial. 0 not checked. [2022-04-06 20:38:32,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 72 proven. 145 refuted. 0 times theorem prover too weak. 7740 trivial. 0 not checked. [2022-04-06 20:38:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734904867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:33,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 8, 8] total 86 [2022-04-06 20:38:33,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127782779] [2022-04-06 20:38:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127782779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:38:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091256539] [2022-04-06 20:38:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:33,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:38:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:38:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7053, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:38:33,331 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:38:40,647 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-04-06 20:38:40,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:38:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 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 230 [2022-04-06 20:38:40,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:38:40,648 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:38:40,648 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 20:38:40,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 452 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=693, Invalid=24429, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 20:38:40,649 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15676 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 15823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 15676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:38:40,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 54 Invalid, 15823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 15676 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:38:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 20:38:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-04-06 20:38:40,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2022-04-06 20:38:40,696 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 230 [2022-04-06 20:38:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:38:40,696 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2022-04-06 20:38:40,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:38:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2022-04-06 20:38:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:38:40,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:38:40,698 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:38:40,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 20:38:40,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:40,899 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:38:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:38:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1831706978, now seen corresponding path program 145 times [2022-04-06 20:38:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:40,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263547291] [2022-04-06 20:38:40,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:38:40,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:38:40,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1831706978, now seen corresponding path program 146 times [2022-04-06 20:38:40,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:38:40,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845902543] [2022-04-06 20:38:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:38:40,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:38:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:38:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:38:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:43,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:38:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845902543] [2022-04-06 20:38:43,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845902543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:38:43,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318250158] [2022-04-06 20:38:43,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:38:43,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:38:43,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:38:43,206 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:38:43,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:38:43,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:38:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:38:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 157 conjunts are in the unsatisfiable core [2022-04-06 20:38:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:38:49,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:38:49,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:38:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 8175 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:38:59,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318250158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:38:59,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:38:59,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 80, 78] total 229 [2022-04-06 20:38:59,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:38:59,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263547291] [2022-04-06 20:38:59,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263547291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:38:59,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:38:59,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:38:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002070665] [2022-04-06 20:38:59,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:38:59,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:38:59,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:38:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:38:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6300, Invalid=45912, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:38:59,836 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:10,302 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-04-06 20:39:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:39:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 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 233 [2022-04-06 20:39:10,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:10,304 INFO L225 Difference]: With dead ends: 247 [2022-04-06 20:39:10,304 INFO L226 Difference]: Without dead ends: 239 [2022-04-06 20:39:10,306 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 315 SyntacticMatches, 3 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16957 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=6742, Invalid=84764, Unknown=0, NotChecked=0, Total=91506 [2022-04-06 20:39:10,306 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 16328 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 16477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 16328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:10,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 234 Invalid, 16477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 16328 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:39:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-04-06 20:39:10,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-04-06 20:39:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0128755364806867) internal successors, (236), 233 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 240 transitions. [2022-04-06 20:39:10,353 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 240 transitions. Word has length 233 [2022-04-06 20:39:10,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:10,354 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 240 transitions. [2022-04-06 20:39:10,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:10,354 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 240 transitions. [2022-04-06 20:39:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-04-06 20:39:10,355 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:10,355 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:10,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:39:10,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:10,575 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:10,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:10,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2097797194, now seen corresponding path program 147 times [2022-04-06 20:39:10,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:10,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007003872] [2022-04-06 20:39:10,576 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:10,576 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:10,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2097797194, now seen corresponding path program 148 times [2022-04-06 20:39:10,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:10,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805803004] [2022-04-06 20:39:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:10,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:12,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805803004] [2022-04-06 20:39:12,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805803004] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:12,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851414230] [2022-04-06 20:39:12,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:39:12,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:12,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:12,936 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:12,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:39:13,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:39:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 161 conjunts are in the unsatisfiable core [2022-04-06 20:39:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:19,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 0 proven. 8398 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 20:39:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851414230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:30,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 81, 79] total 232 [2022-04-06 20:39:30,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:30,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007003872] [2022-04-06 20:39:30,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007003872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:30,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:30,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:39:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386399836] [2022-04-06 20:39:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:30,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:39:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:39:30,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6460, Invalid=47132, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 20:39:30,287 INFO L87 Difference]: Start difference. First operand 238 states and 240 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:40,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:40,750 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-04-06 20:39:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:39:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 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 236 [2022-04-06 20:39:40,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:40,751 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:39:40,751 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:39:40,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 319 SyntacticMatches, 3 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17411 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=6908, Invalid=87034, Unknown=0, NotChecked=0, Total=93942 [2022-04-06 20:39:40,754 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 16578 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 16729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 16578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:40,754 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 74 Invalid, 16729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 16578 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:39:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:39:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-04-06 20:39:40,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0127118644067796) internal successors, (239), 236 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-04-06 20:39:40,809 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 236 [2022-04-06 20:39:40,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:40,809 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-04-06 20:39:40,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:40,809 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-04-06 20:39:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:39:40,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:40,810 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:40,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 20:39:41,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 20:39:41,023 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash 681793634, now seen corresponding path program 149 times [2022-04-06 20:39:41,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:41,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [151282365] [2022-04-06 20:39:41,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:41,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:41,025 INFO L85 PathProgramCache]: Analyzing trace with hash 681793634, now seen corresponding path program 150 times [2022-04-06 20:39:41,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:41,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353868412] [2022-04-06 20:39:41,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:41,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 151 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:43,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353868412] [2022-04-06 20:39:43,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353868412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028716112] [2022-04-06 20:39:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:39:43,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:43,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:43,438 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:39:43,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:39:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:39:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:39:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 8475 trivial. 0 not checked. [2022-04-06 20:39:44,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:39:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 8475 trivial. 0 not checked. [2022-04-06 20:39:45,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028716112] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:39:45,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:39:45,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 7, 7] total 87 [2022-04-06 20:39:45,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:39:45,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [151282365] [2022-04-06 20:39:45,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [151282365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:39:45,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:39:45,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:39:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618229555] [2022-04-06 20:39:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:39:45,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:39:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:45,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:39:45,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7231, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:39:45,211 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:39:53,198 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2022-04-06 20:39:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:39:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-04-06 20:39:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:39:53,199 INFO L225 Difference]: With dead ends: 253 [2022-04-06 20:39:53,199 INFO L226 Difference]: Without dead ends: 245 [2022-04-06 20:39:53,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 472 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2862 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=705, Invalid=25701, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:39:53,200 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 17296 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 17449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 17296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:39:53,200 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 299 Invalid, 17449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 17296 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 20:39:53,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-04-06 20:39:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-04-06 20:39:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-04-06 20:39:53,249 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2022-04-06 20:39:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:39:53,249 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-04-06 20:39:53,249 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:39:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-04-06 20:39:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-04-06 20:39:53,250 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:39:53,250 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:39:53,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:39:53,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:39:53,451 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:39:53,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:39:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1688518986, now seen corresponding path program 151 times [2022-04-06 20:39:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:39:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083827934] [2022-04-06 20:39:53,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:39:53,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:39:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1688518986, now seen corresponding path program 152 times [2022-04-06 20:39:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:39:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227969570] [2022-04-06 20:39:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:39:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:39:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:55,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:39:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:39:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 153 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:39:55,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:39:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227969570] [2022-04-06 20:39:55,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227969570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:39:55,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170561304] [2022-04-06 20:39:55,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:39:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:39:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:39:55,926 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:39:55,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:39:55,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:39:55,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:39:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 20:39:55,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:02,191 INFO L328 TraceCheckSpWp]: Computing backward predicates...