/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:44:30,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:44:30,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:44:30,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:44:30,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:44:30,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:44:30,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:44:30,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 19:44:30,363 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:44:30,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:44:30,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:44:30,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:44:30,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:44:30,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:44:30,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:44:30,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:44:30,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:44:30,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:44:30,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:30,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:44:30,367 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:44:30,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:44:30,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:44:30,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:44:30,607 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:44:30,608 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:44:30,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-04-06 19:44:30,659 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c36411ea/a0b7a7713be546548a3508ae99797dd8/FLAG67e663df9 [2022-04-06 19:44:30,999 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:44:31,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-04-06 19:44:31,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c36411ea/a0b7a7713be546548a3508ae99797dd8/FLAG67e663df9 [2022-04-06 19:44:31,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c36411ea/a0b7a7713be546548a3508ae99797dd8 [2022-04-06 19:44:31,435 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:44:31,436 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:44:31,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:31,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:44:31,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:44:31,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c39676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31, skipping insertion in model container [2022-04-06 19:44:31,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:44:31,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:44:31,598 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-04-06 19:44:31,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:31,614 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:44:31,623 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i[809,822] [2022-04-06 19:44:31,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:44:31,635 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:44:31,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31 WrapperNode [2022-04-06 19:44:31,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:44:31,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:44:31,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:44:31,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:44:31,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:44:31,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:44:31,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:44:31,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:44:31,662 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (1/1) ... [2022-04-06 19:44:31,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:44:31,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:31,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 19:44:31,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 19:44:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:44:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:44:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:44:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:44:31,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:44:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 19:44:31,729 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:44:31,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:44:31,779 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:44:31,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:44:31,866 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:44:31,871 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:44:31,871 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 19:44:31,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:31 BoogieIcfgContainer [2022-04-06 19:44:31,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:44:31,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:44:31,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:44:31,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:44:31,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:44:31" (1/3) ... [2022-04-06 19:44:31,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441ff2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:31, skipping insertion in model container [2022-04-06 19:44:31,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:44:31" (2/3) ... [2022-04-06 19:44:31,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441ff2a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:44:31, skipping insertion in model container [2022-04-06 19:44:31,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:44:31" (3/3) ... [2022-04-06 19:44:31,890 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-04-06 19:44:31,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:44:31,894 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:44:31,949 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:44:31,955 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 19:44:31,955 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:44:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:44:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:44:31,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:31,972 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:31,973 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:31,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2022-04-06 19:44:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647732365] [2022-04-06 19:44:32,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 2 times [2022-04-06 19:44:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400246056] [2022-04-06 19:44:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:32,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:32,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:32,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400246056] [2022-04-06 19:44:32,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400246056] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:32,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:32,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:32,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647732365] [2022-04-06 19:44:32,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647732365] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:32,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:44:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171745099] [2022-04-06 19:44:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:32,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:44:32,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:44:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:32,261 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:32,320 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-06 19:44:32,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:44:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:44:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:32,329 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:44:32,329 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 19:44:32,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:44:32,337 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:32,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 19:44:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 19:44:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-04-06 19:44:32,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-04-06 19:44:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:32,385 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-04-06 19:44:32,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-06 19:44:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:44:32,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:32,386 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:32,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:44:32,386 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:32,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:32,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2022-04-06 19:44:32,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1717503363] [2022-04-06 19:44:32,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:44:32,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 2 times [2022-04-06 19:44:32,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:32,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984745376] [2022-04-06 19:44:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:32,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:32,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984745376] [2022-04-06 19:44:32,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984745376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:32,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:32,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:32,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1717503363] [2022-04-06 19:44:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1717503363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:32,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:44:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800318170] [2022-04-06 19:44:32,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:32,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:44:32,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:44:32,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:44:32,458 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:32,517 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-06 19:44:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:44:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 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 15 [2022-04-06 19:44:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:32,520 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:44:32,520 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 19:44:32,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 19:44:32,523 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:32,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 19:44:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-04-06 19:44:32,530 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 19:44:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 19:44:32,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-04-06 19:44:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:32,531 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 19:44:32,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 19:44:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:44:32,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:32,532 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:32,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:44:32,533 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2022-04-06 19:44:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1214910639] [2022-04-06 19:44:32,540 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:32,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 2 times [2022-04-06 19:44:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:32,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634540985] [2022-04-06 19:44:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:32,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:44:32,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:32,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634540985] [2022-04-06 19:44:32,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634540985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:32,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897093911] [2022-04-06 19:44:32,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:32,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:32,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:32,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:32,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 19:44:32,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 19:44:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:32,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:44:32,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:44:32,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:44:32,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897093911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:44:32,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-04-06 19:44:32,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:32,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1214910639] [2022-04-06 19:44:32,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1214910639] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:32,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:32,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:44:32,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582626789] [2022-04-06 19:44:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:32,776 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:44:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:44:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:44:32,777 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), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:32,829 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-04-06 19:44:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:44:32,829 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), 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 17 [2022-04-06 19:44:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:32,830 INFO L225 Difference]: With dead ends: 29 [2022-04-06 19:44:32,830 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:44:32,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 19:44:32,832 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:32,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:44:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-04-06 19:44:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-06 19:44:32,837 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-04-06 19:44:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:32,837 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-06 19:44:32,837 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), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-06 19:44:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:44:32,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:32,838 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:32,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 19:44:33,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:33,060 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 1 times [2022-04-06 19:44:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:33,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [753373514] [2022-04-06 19:44:33,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:33,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:33,065 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 2 times [2022-04-06 19:44:33,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:33,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667186342] [2022-04-06 19:44:33,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:33,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:33,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667186342] [2022-04-06 19:44:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667186342] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:33,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398579883] [2022-04-06 19:44:33,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:33,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:33,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:33,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:33,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 19:44:33,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-06 19:44:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:33,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398579883] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:33,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:33,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 19:44:33,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [753373514] [2022-04-06 19:44:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [753373514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:33,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:33,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:44:33,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541249454] [2022-04-06 19:44:33,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:33,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:44:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:44:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:44:33,325 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:33,417 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-04-06 19:44:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:44:33,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 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 21 [2022-04-06 19:44:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:33,419 INFO L225 Difference]: With dead ends: 44 [2022-04-06 19:44:33,419 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 19:44:33,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:44:33,425 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:33,425 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 19:44:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-04-06 19:44:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 19:44:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-04-06 19:44:33,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-04-06 19:44:33,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:33,431 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-04-06 19:44:33,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:33,431 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-04-06 19:44:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:44:33,432 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:33,432 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:33,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:33,659 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 19:44:33,660 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 3 times [2022-04-06 19:44:33,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1985012496] [2022-04-06 19:44:33,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:33,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:33,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 4 times [2022-04-06 19:44:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:33,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320128344] [2022-04-06 19:44:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:33,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:33,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:33,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320128344] [2022-04-06 19:44:33,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320128344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:33,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202162213] [2022-04-06 19:44:33,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:33,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:33,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:33,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:33,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 19:44:33,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:33,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:44:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:33,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 19:44:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202162213] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:33,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:33,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-04-06 19:44:33,955 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1985012496] [2022-04-06 19:44:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1985012496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:33,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:33,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:44:33,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793012761] [2022-04-06 19:44:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:33,956 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:44:33,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:44:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:33,957 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:34,051 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-06 19:44:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:44:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 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 19:44:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:34,053 INFO L225 Difference]: With dead ends: 35 [2022-04-06 19:44:34,053 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:44:34,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:34,055 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:34,055 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:44:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:44:34,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-04-06 19:44:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 19:44:34,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-04-06 19:44:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:34,061 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 19:44:34,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 19:44:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:44:34,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:34,062 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:34,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:34,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:34,278 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:34,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 5 times [2022-04-06 19:44:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:34,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1203462628] [2022-04-06 19:44:34,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:34,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 6 times [2022-04-06 19:44:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:34,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466500785] [2022-04-06 19:44:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:34,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:34,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:34,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466500785] [2022-04-06 19:44:34,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466500785] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:34,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343136704] [2022-04-06 19:44:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:34,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:34,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:34,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:34,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 19:44:34,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:44:34,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:34,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 19:44:34,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343136704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:34,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:34,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-04-06 19:44:34,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:34,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1203462628] [2022-04-06 19:44:34,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1203462628] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:34,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:34,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:44:34,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561284526] [2022-04-06 19:44:34,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:34,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:44:34,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:34,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:44:34,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:34,573 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:34,659 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-04-06 19:44:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:44:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 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 27 [2022-04-06 19:44:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:34,660 INFO L225 Difference]: With dead ends: 54 [2022-04-06 19:44:34,660 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 19:44:34,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:44:34,661 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:34,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 19:44:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-04-06 19:44:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-04-06 19:44:34,668 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2022-04-06 19:44:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:34,669 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-04-06 19:44:34,669 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-04-06 19:44:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:44:34,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:34,670 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:34,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:34,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:34,887 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 7 times [2022-04-06 19:44:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869368978] [2022-04-06 19:44:34,890 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:34,890 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 8 times [2022-04-06 19:44:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505154819] [2022-04-06 19:44:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:34,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:34,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:34,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505154819] [2022-04-06 19:44:34,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505154819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:34,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962945038] [2022-04-06 19:44:34,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:34,960 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:34,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 19:44:35,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:35,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:35,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:44:35,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:35,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:35,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962945038] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:35,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:35,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 19:44:35,144 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:35,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869368978] [2022-04-06 19:44:35,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869368978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:35,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:35,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:44:35,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132109761] [2022-04-06 19:44:35,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:35,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:44:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:44:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 19:44:35,145 INFO L87 Difference]: Start difference. First operand 30 states and 34 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 19:44:35,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:35,244 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-04-06 19:44:35,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:44:35,244 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 29 [2022-04-06 19:44:35,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:35,246 INFO L225 Difference]: With dead ends: 61 [2022-04-06 19:44:35,246 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 19:44:35,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:44:35,247 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 66 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:35,248 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 19:44:35,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-04-06 19:44:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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 19:44:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-06 19:44:35,264 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-04-06 19:44:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:35,264 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-06 19:44:35,264 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 19:44:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-06 19:44:35,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:44:35,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:35,265 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:35,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:35,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:35,480 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 9 times [2022-04-06 19:44:35,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:35,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572339806] [2022-04-06 19:44:35,481 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:35,481 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 10 times [2022-04-06 19:44:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:35,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288567433] [2022-04-06 19:44:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:35,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:35,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288567433] [2022-04-06 19:44:35,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288567433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:35,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46190782] [2022-04-06 19:44:35,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:35,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:35,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:35,540 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:35,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 19:44:35,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:35,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:35,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:35,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:35,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46190782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:35,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:35,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 19:44:35,733 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:35,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572339806] [2022-04-06 19:44:35,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572339806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:35,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:44:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389374930] [2022-04-06 19:44:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:35,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:44:35,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:44:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:44:35,735 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:35,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:35,834 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-04-06 19:44:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:44:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:44:35,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:35,835 INFO L225 Difference]: With dead ends: 68 [2022-04-06 19:44:35,835 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 19:44:35,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:44:35,836 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:35,836 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:35,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 19:44:35,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-04-06 19:44:35,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-06 19:44:35,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2022-04-06 19:44:35,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:35,844 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-06 19:44:35,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:35,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-06 19:44:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:44:35,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:35,844 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:35,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:36,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:36,060 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 11 times [2022-04-06 19:44:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2013276990] [2022-04-06 19:44:36,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:36,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 12 times [2022-04-06 19:44:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017331961] [2022-04-06 19:44:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:36,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:36,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017331961] [2022-04-06 19:44:36,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017331961] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161990503] [2022-04-06 19:44:36,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:36,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:36,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:36,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 19:44:36,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:36,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:44:36,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 19:44:36,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161990503] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:36,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:36,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-04-06 19:44:36,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:36,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2013276990] [2022-04-06 19:44:36,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2013276990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:36,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:36,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:44:36,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687712808] [2022-04-06 19:44:36,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:36,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:44:36,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:36,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:44:36,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-04-06 19:44:36,352 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:36,496 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-04-06 19:44:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:44:36,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:44:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:36,497 INFO L225 Difference]: With dead ends: 75 [2022-04-06 19:44:36,497 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 19:44:36,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:44:36,498 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:36,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 19:44:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-04-06 19:44:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-04-06 19:44:36,505 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2022-04-06 19:44:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:36,505 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-04-06 19:44:36,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-04-06 19:44:36,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:44:36,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:36,506 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:36,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:36,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:36,720 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 13 times [2022-04-06 19:44:36,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:36,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182663735] [2022-04-06 19:44:36,722 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:36,722 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 14 times [2022-04-06 19:44:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:36,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300515243] [2022-04-06 19:44:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:36,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300515243] [2022-04-06 19:44:36,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300515243] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:36,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605706436] [2022-04-06 19:44:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:36,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:36,794 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:36,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 19:44:36,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:36,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:44:36,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:36,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:37,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605706436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:37,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:37,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 19:44:37,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:37,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182663735] [2022-04-06 19:44:37,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182663735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:37,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:37,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:44:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369664753] [2022-04-06 19:44:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:37,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:44:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:44:37,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:37,060 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:37,218 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-04-06 19:44:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:44:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 35 [2022-04-06 19:44:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:37,220 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:44:37,220 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 19:44:37,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:44:37,222 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 158 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:37,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:37,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 19:44:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-04-06 19:44:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 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 19:44:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-04-06 19:44:37,240 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2022-04-06 19:44:37,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:37,241 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-04-06 19:44:37,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-06 19:44:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:44:37,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:37,246 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:37,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:37,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 19:44:37,452 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 15 times [2022-04-06 19:44:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [434409392] [2022-04-06 19:44:37,454 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:37,454 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 16 times [2022-04-06 19:44:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:37,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472361974] [2022-04-06 19:44:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:37,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472361974] [2022-04-06 19:44:37,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472361974] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:37,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023872521] [2022-04-06 19:44:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:37,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:37,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:37,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:37,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 19:44:37,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:37,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:37,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:44:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:37,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:37,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023872521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:37,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 19:44:37,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [434409392] [2022-04-06 19:44:37,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [434409392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:37,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:44:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813097921] [2022-04-06 19:44:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:37,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:44:37,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:44:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:44:37,821 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:37,993 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-04-06 19:44:37,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:44:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 19:44:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:37,996 INFO L225 Difference]: With dead ends: 89 [2022-04-06 19:44:37,996 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 19:44:37,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=430, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:44:37,997 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:37,997 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 19:44:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-04-06 19:44:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-04-06 19:44:38,006 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2022-04-06 19:44:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:38,006 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-04-06 19:44:38,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-04-06 19:44:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:44:38,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:38,007 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:38,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:38,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:38,228 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 17 times [2022-04-06 19:44:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81993484] [2022-04-06 19:44:38,229 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:38,230 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 18 times [2022-04-06 19:44:38,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86174458] [2022-04-06 19:44:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:38,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:38,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:38,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86174458] [2022-04-06 19:44:38,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86174458] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:38,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040555675] [2022-04-06 19:44:38,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:38,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:38,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:38,342 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:38,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 19:44:38,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:44:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 19:44:38,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040555675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:38,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:38,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-04-06 19:44:38,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:38,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81993484] [2022-04-06 19:44:38,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81993484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:38,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:38,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:44:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104535072] [2022-04-06 19:44:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:38,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:44:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:44:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-04-06 19:44:38,576 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:38,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:38,781 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-04-06 19:44:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:44:38,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 19:44:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:38,782 INFO L225 Difference]: With dead ends: 96 [2022-04-06 19:44:38,782 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 19:44:38,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:44:38,783 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:38,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 22 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:38,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 19:44:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-04-06 19:44:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-04-06 19:44:38,790 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2022-04-06 19:44:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:38,791 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-04-06 19:44:38,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:38,791 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-04-06 19:44:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:44:38,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:38,791 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:38,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:39,011 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 19:44:39,011 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 19 times [2022-04-06 19:44:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678863799] [2022-04-06 19:44:39,013 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:39,013 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 20 times [2022-04-06 19:44:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:39,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747478235] [2022-04-06 19:44:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:39,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:39,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747478235] [2022-04-06 19:44:39,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747478235] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683604713] [2022-04-06 19:44:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:39,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:39,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:39,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 19:44:39,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:39,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:44:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:39,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683604713] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:39,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:39,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 19:44:39,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678863799] [2022-04-06 19:44:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678863799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:39,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:39,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:44:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432957503] [2022-04-06 19:44:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:39,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:44:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:39,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:44:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:39,469 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:39,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:39,678 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-04-06 19:44:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:44:39,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 41 [2022-04-06 19:44:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:39,679 INFO L225 Difference]: With dead ends: 103 [2022-04-06 19:44:39,679 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 19:44:39,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:44:39,680 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:39,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 37 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:39,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 19:44:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2022-04-06 19:44:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 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 19:44:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-04-06 19:44:39,688 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2022-04-06 19:44:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:39,688 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-04-06 19:44:39,688 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-04-06 19:44:39,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 19:44:39,688 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:39,688 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:39,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:39,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 19:44:39,912 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:39,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 21 times [2022-04-06 19:44:39,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:39,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1345123346] [2022-04-06 19:44:39,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:39,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 22 times [2022-04-06 19:44:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:39,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007065945] [2022-04-06 19:44:39,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:40,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:40,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007065945] [2022-04-06 19:44:40,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007065945] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205940023] [2022-04-06 19:44:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:40,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:40,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 19:44:40,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:40,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 19:44:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:40,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:40,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205940023] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:40,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-04-06 19:44:40,401 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1345123346] [2022-04-06 19:44:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1345123346] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:40,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:40,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:44:40,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714912022] [2022-04-06 19:44:40,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:40,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:44:40,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:40,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:44:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:44:40,403 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:40,660 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2022-04-06 19:44:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:44:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 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 43 [2022-04-06 19:44:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:40,661 INFO L225 Difference]: With dead ends: 110 [2022-04-06 19:44:40,662 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 19:44:40,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:44:40,663 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 224 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:40,663 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 27 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 19:44:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-04-06 19:44:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-06 19:44:40,670 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2022-04-06 19:44:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:40,671 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-06 19:44:40,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-06 19:44:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:44:40,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:40,672 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:40,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:40,886 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 19:44:40,886 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 23 times [2022-04-06 19:44:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:40,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849351410] [2022-04-06 19:44:40,888 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:40,888 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 24 times [2022-04-06 19:44:40,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269422] [2022-04-06 19:44:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:41,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269422] [2022-04-06 19:44:41,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226969947] [2022-04-06 19:44:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:41,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:41,020 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:41,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 19:44:41,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:41,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:41,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 19:44:41,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226969947] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:41,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:41,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-04-06 19:44:41,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849351410] [2022-04-06 19:44:41,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849351410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:41,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:41,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:44:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008397104] [2022-04-06 19:44:41,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:41,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:44:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:44:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-04-06 19:44:41,280 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:41,541 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-04-06 19:44:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:44:41,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 19:44:41,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:41,543 INFO L225 Difference]: With dead ends: 117 [2022-04-06 19:44:41,543 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 19:44:41,543 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:44:41,544 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 231 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:41,544 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 27 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 19:44:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-04-06 19:44:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-04-06 19:44:41,553 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2022-04-06 19:44:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:41,553 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-04-06 19:44:41,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-04-06 19:44:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:44:41,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:41,554 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:41,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:41,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 19:44:41,780 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 25 times [2022-04-06 19:44:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:41,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [966647808] [2022-04-06 19:44:41,781 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:41,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:41,781 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 26 times [2022-04-06 19:44:41,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:41,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873065972] [2022-04-06 19:44:41,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:41,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:41,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:41,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873065972] [2022-04-06 19:44:41,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873065972] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:41,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739401341] [2022-04-06 19:44:41,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:41,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:41,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:41,899 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:41,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 19:44:41,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:41,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 19:44:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:42,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:42,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739401341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:42,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:42,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 19:44:42,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:42,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [966647808] [2022-04-06 19:44:42,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [966647808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:42,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:42,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:44:42,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440770123] [2022-04-06 19:44:42,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:42,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:44:42,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:42,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:44:42,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:44:42,336 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:42,638 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-04-06 19:44:42,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:44:42,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 47 [2022-04-06 19:44:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:42,639 INFO L225 Difference]: With dead ends: 124 [2022-04-06 19:44:42,639 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 19:44:42,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:44:42,640 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 241 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:42,640 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 32 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 19:44:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2022-04-06 19:44:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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 19:44:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-04-06 19:44:42,648 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2022-04-06 19:44:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:42,649 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-04-06 19:44:42,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-04-06 19:44:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 19:44:42,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:42,649 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:42,666 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 19:44:42,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:42,855 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:42,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 27 times [2022-04-06 19:44:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:42,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902769513] [2022-04-06 19:44:42,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:42,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:42,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 28 times [2022-04-06 19:44:42,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:42,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30809491] [2022-04-06 19:44:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:42,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:42,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30809491] [2022-04-06 19:44:42,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30809491] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347322733] [2022-04-06 19:44:42,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:42,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:42,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:42,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:42,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 19:44:43,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:43,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:44:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:43,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:43,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347322733] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:43,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:43,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-06 19:44:43,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902769513] [2022-04-06 19:44:43,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902769513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:43,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:43,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:44:43,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700330796] [2022-04-06 19:44:43,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:43,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:44:43,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:44:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:44:43,428 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:43,737 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-04-06 19:44:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:44:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 19:44:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:43,738 INFO L225 Difference]: With dead ends: 131 [2022-04-06 19:44:43,739 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 19:44:43,739 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:44:43,740 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 311 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:43,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 32 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 19:44:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2022-04-06 19:44:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:43,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-06 19:44:43,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2022-04-06 19:44:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:43,750 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-06 19:44:43,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:43,750 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-06 19:44:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:44:43,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:43,751 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:43,770 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 19:44:43,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:44:43,955 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 29 times [2022-04-06 19:44:43,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:43,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393641540] [2022-04-06 19:44:43,958 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:43,958 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 30 times [2022-04-06 19:44:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:43,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316649307] [2022-04-06 19:44:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:44,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:44,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316649307] [2022-04-06 19:44:44,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316649307] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:44,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99427434] [2022-04-06 19:44:44,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:44,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:44,091 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:44,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 19:44:44,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 19:44:44,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 19:44:44,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99427434] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:44,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:44,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-04-06 19:44:44,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:44,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393641540] [2022-04-06 19:44:44,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393641540] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:44,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:44,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:44:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879058899] [2022-04-06 19:44:44,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:44,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:44:44,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:44,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:44:44,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-04-06 19:44:44,357 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:44,701 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-04-06 19:44:44,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:44:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:44:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:44,702 INFO L225 Difference]: With dead ends: 138 [2022-04-06 19:44:44,702 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 19:44:44,702 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:44:44,703 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 334 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:44,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 27 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 19:44:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2022-04-06 19:44:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-04-06 19:44:44,710 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2022-04-06 19:44:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:44,710 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-04-06 19:44:44,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-04-06 19:44:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:44:44,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:44,711 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:44,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:44,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:44:44,911 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 31 times [2022-04-06 19:44:44,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:44,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272755452] [2022-04-06 19:44:44,913 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:44,913 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:44,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 32 times [2022-04-06 19:44:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029629921] [2022-04-06 19:44:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:45,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:45,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029629921] [2022-04-06 19:44:45,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029629921] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:45,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556520869] [2022-04-06 19:44:45,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:45,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:45,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:45,099 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:45,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 19:44:45,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 19:44:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:45,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:45,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556520869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:45,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:45,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-06 19:44:45,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:45,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272755452] [2022-04-06 19:44:45,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272755452] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:45,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:45,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:44:45,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271931103] [2022-04-06 19:44:45,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:45,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:44:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:45,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:44:45,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:44:45,648 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:46,079 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-04-06 19:44:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:44:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 53 [2022-04-06 19:44:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:46,081 INFO L225 Difference]: With dead ends: 145 [2022-04-06 19:44:46,081 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 19:44:46,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:44:46,082 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:46,082 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 19:44:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2022-04-06 19:44:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-04-06 19:44:46,094 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2022-04-06 19:44:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:46,094 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-04-06 19:44:46,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-04-06 19:44:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:44:46,094 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:46,095 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:46,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:46,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:46,316 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 33 times [2022-04-06 19:44:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040127258] [2022-04-06 19:44:46,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:46,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 34 times [2022-04-06 19:44:46,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:46,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023456019] [2022-04-06 19:44:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:46,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:46,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:46,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023456019] [2022-04-06 19:44:46,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023456019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:46,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427544469] [2022-04-06 19:44:46,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:46,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:46,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:46,513 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:46,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 19:44:46,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:46,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 19:44:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:46,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:47,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427544469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:47,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:47,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-04-06 19:44:47,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:47,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040127258] [2022-04-06 19:44:47,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040127258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:47,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:47,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:44:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428183614] [2022-04-06 19:44:47,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:47,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:44:47,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:47,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:44:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:44:47,048 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:47,415 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-04-06 19:44:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:44:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 19:44:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:47,416 INFO L225 Difference]: With dead ends: 152 [2022-04-06 19:44:47,416 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 19:44:47,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1298, Invalid=1672, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:44:47,418 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 319 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:47,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 32 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:44:47,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 19:44:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2022-04-06 19:44:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:47,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-04-06 19:44:47,429 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2022-04-06 19:44:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:47,429 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-04-06 19:44:47,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-04-06 19:44:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 19:44:47,430 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:47,430 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:47,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:47,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:47,635 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:47,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:47,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 35 times [2022-04-06 19:44:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:47,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1533749905] [2022-04-06 19:44:47,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:47,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:47,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 36 times [2022-04-06 19:44:47,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:47,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674860284] [2022-04-06 19:44:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:47,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:47,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:47,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674860284] [2022-04-06 19:44:47,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674860284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:47,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119070339] [2022-04-06 19:44:47,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:47,813 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:47,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 19:44:47,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:47,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:47,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:44:47,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 19:44:48,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119070339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:48,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:48,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-04-06 19:44:48,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:48,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1533749905] [2022-04-06 19:44:48,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1533749905] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:48,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:44:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380366261] [2022-04-06 19:44:48,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:48,103 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:44:48,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:48,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:44:48,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-04-06 19:44:48,104 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:48,559 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-04-06 19:44:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:44:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 19:44:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:48,561 INFO L225 Difference]: With dead ends: 159 [2022-04-06 19:44:48,561 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 19:44:48,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:44:48,562 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 346 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:48,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 32 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 19:44:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2022-04-06 19:44:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-04-06 19:44:48,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2022-04-06 19:44:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:48,576 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-04-06 19:44:48,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-04-06 19:44:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:44:48,577 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:48,577 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:48,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:48,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:48,800 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 37 times [2022-04-06 19:44:48,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:48,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099263588] [2022-04-06 19:44:48,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:48,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 38 times [2022-04-06 19:44:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:48,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757024886] [2022-04-06 19:44:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:49,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757024886] [2022-04-06 19:44:49,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757024886] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886897215] [2022-04-06 19:44:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:49,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:49,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:49,042 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:49,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 19:44:49,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:49,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:49,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 19:44:49,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:49,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:49,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886897215] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:49,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:49,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-04-06 19:44:49,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:49,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099263588] [2022-04-06 19:44:49,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099263588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:49,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:49,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:44:49,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718634762] [2022-04-06 19:44:49,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:49,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:44:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:49,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:44:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:44:49,732 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:50,204 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-04-06 19:44:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:44:50,206 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 59 [2022-04-06 19:44:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:50,207 INFO L225 Difference]: With dead ends: 166 [2022-04-06 19:44:50,207 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 19:44:50,208 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:44:50,208 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 344 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:50,208 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 19:44:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2022-04-06 19:44:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 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 19:44:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-04-06 19:44:50,220 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2022-04-06 19:44:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:50,220 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-04-06 19:44:50,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-04-06 19:44:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:44:50,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:50,221 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:50,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 19:44:50,421 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 19:44:50,422 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 39 times [2022-04-06 19:44:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783680668] [2022-04-06 19:44:50,423 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:50,423 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 40 times [2022-04-06 19:44:50,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976340720] [2022-04-06 19:44:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:50,643 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:50,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976340720] [2022-04-06 19:44:50,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976340720] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620172389] [2022-04-06 19:44:50,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:50,644 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:50,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 19:44:50,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:50,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:50,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 19:44:50,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:50,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:51,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620172389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:51,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:51,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-04-06 19:44:51,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:51,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783680668] [2022-04-06 19:44:51,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783680668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:51,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:51,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:44:51,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275311042] [2022-04-06 19:44:51,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:51,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:44:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:44:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:44:51,345 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:51,868 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-04-06 19:44:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:44:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 19:44:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:51,869 INFO L225 Difference]: With dead ends: 173 [2022-04-06 19:44:51,869 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 19:44:51,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:44:51,871 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 461 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:51,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 32 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 19:44:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2022-04-06 19:44:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-04-06 19:44:51,884 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2022-04-06 19:44:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:51,884 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-04-06 19:44:51,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-04-06 19:44:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:44:51,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:51,885 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:51,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 19:44:52,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 19:44:52,103 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:52,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 41 times [2022-04-06 19:44:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539856539] [2022-04-06 19:44:52,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:52,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 42 times [2022-04-06 19:44:52,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:52,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440588047] [2022-04-06 19:44:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:52,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440588047] [2022-04-06 19:44:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440588047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920348883] [2022-04-06 19:44:52,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:52,354 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:52,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 19:44:52,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:52,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:52,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 19:44:52,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 19:44:52,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920348883] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:52,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:52,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-04-06 19:44:52,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:52,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539856539] [2022-04-06 19:44:52,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539856539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:52,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:52,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:44:52,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410288651] [2022-04-06 19:44:52,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:52,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:44:52,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:52,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:44:52,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:44:52,683 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:53,242 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2022-04-06 19:44:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:44:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 19:44:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:53,244 INFO L225 Difference]: With dead ends: 180 [2022-04-06 19:44:53,244 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 19:44:53,245 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:44:53,245 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 433 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:53,245 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 32 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 19:44:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2022-04-06 19:44:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-04-06 19:44:53,260 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2022-04-06 19:44:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:53,260 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-04-06 19:44:53,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-04-06 19:44:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:44:53,261 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:53,261 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:53,280 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 19:44:53,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:53,472 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:53,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:53,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 43 times [2022-04-06 19:44:53,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:53,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139827816] [2022-04-06 19:44:53,474 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:53,474 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:53,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 44 times [2022-04-06 19:44:53,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:53,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188962410] [2022-04-06 19:44:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:53,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:53,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188962410] [2022-04-06 19:44:53,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188962410] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475289704] [2022-04-06 19:44:53,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:53,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:53,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:53,731 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:53,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 19:44:53,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:53,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:53,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:44:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:53,978 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:53,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:54,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475289704] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:54,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:54,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-04-06 19:44:54,613 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:54,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139827816] [2022-04-06 19:44:54,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139827816] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:54,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:54,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:44:54,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347795780] [2022-04-06 19:44:54,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:54,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:44:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:44:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:44:54,615 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 19:44:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:55,188 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-04-06 19:44:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:44:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 65 [2022-04-06 19:44:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:55,189 INFO L225 Difference]: With dead ends: 187 [2022-04-06 19:44:55,190 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 19:44:55,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:44:55,191 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 474 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:55,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 32 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 19:44:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2022-04-06 19:44:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 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 19:44:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-04-06 19:44:55,206 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2022-04-06 19:44:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:55,206 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-04-06 19:44:55,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 19:44:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-04-06 19:44:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 19:44:55,207 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:55,207 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:55,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 19:44:55,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:55,408 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:55,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 45 times [2022-04-06 19:44:55,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:55,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005156069] [2022-04-06 19:44:55,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:55,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:55,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 46 times [2022-04-06 19:44:55,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:55,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305868632] [2022-04-06 19:44:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:55,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:55,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:55,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305868632] [2022-04-06 19:44:55,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305868632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:55,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963274979] [2022-04-06 19:44:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:44:55,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:55,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:55,728 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:55,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 19:44:55,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:44:55,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 19:44:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:55,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963274979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:56,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:56,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-04-06 19:44:56,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:56,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005156069] [2022-04-06 19:44:56,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005156069] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:56,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:56,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:44:56,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169119970] [2022-04-06 19:44:56,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:56,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:44:56,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:56,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:44:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:44:56,627 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:57,249 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2022-04-06 19:44:57,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:44:57,250 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 19:44:57,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:57,250 INFO L225 Difference]: With dead ends: 194 [2022-04-06 19:44:57,251 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 19:44:57,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:44:57,252 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:57,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 52 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 19:44:57,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2022-04-06 19:44:57,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-04-06 19:44:57,268 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2022-04-06 19:44:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:57,269 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-04-06 19:44:57,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-04-06 19:44:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:44:57,269 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:57,269 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:57,285 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 19:44:57,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 19:44:57,470 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:57,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 47 times [2022-04-06 19:44:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:57,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855559784] [2022-04-06 19:44:57,471 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:57,471 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:57,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 48 times [2022-04-06 19:44:57,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:57,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570999653] [2022-04-06 19:44:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:57,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:57,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570999653] [2022-04-06 19:44:57,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570999653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593072435] [2022-04-06 19:44:57,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:44:57,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:57,773 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:57,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 19:44:57,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:44:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:44:57,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 19:44:57,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:44:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-04-06 19:44:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593072435] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:44:58,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:44:58,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-04-06 19:44:58,133 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:44:58,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855559784] [2022-04-06 19:44:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855559784] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:44:58,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:44:58,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:44:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47975795] [2022-04-06 19:44:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:44:58,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:44:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:44:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 19:44:58,135 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:44:58,887 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-04-06 19:44:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:44:58,887 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:44:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:44:58,888 INFO L225 Difference]: With dead ends: 201 [2022-04-06 19:44:58,888 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 19:44:58,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:44:58,890 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 517 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:44:58,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 47 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:44:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 19:44:58,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2022-04-06 19:44:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-04-06 19:44:58,911 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2022-04-06 19:44:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:44:58,911 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-04-06 19:44:58,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:44:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-04-06 19:44:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:44:58,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:44:58,912 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:44:58,934 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 19:44:59,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 19:44:59,126 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:44:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:44:59,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 49 times [2022-04-06 19:44:59,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:44:59,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [872173783] [2022-04-06 19:44:59,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:44:59,128 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:44:59,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 50 times [2022-04-06 19:44:59,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:44:59,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148635277] [2022-04-06 19:44:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:44:59,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:44:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:44:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:44:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:59,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:44:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148635277] [2022-04-06 19:44:59,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148635277] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:44:59,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336246154] [2022-04-06 19:44:59,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:44:59,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:44:59,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:44:59,449 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:44:59,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 19:44:59,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:44:59,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:44:59,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 19:44:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:44:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:44:59,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:00,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336246154] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:00,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:00,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 19:45:00,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:00,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [872173783] [2022-04-06 19:45:00,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [872173783] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:00,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:00,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:45:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642352523] [2022-04-06 19:45:00,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:00,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:45:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:45:00,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:45:00,391 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:01,154 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2022-04-06 19:45:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:45:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 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 71 [2022-04-06 19:45:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:01,164 INFO L225 Difference]: With dead ends: 208 [2022-04-06 19:45:01,164 INFO L226 Difference]: Without dead ends: 191 [2022-04-06 19:45:01,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:45:01,166 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 451 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:01,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 57 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:01,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-06 19:45:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2022-04-06 19:45:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 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 19:45:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-04-06 19:45:01,190 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2022-04-06 19:45:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:01,190 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-04-06 19:45:01,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-04-06 19:45:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:45:01,191 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:01,191 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:01,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:01,413 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:45:01,414 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 51 times [2022-04-06 19:45:01,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:01,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414783364] [2022-04-06 19:45:01,415 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:01,415 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 52 times [2022-04-06 19:45:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:01,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821976216] [2022-04-06 19:45:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:01,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821976216] [2022-04-06 19:45:01,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821976216] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:01,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516534571] [2022-04-06 19:45:01,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:01,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:01,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:01,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 19:45:01,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:01,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:45:01,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:01,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516534571] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:02,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:02,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-04-06 19:45:02,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414783364] [2022-04-06 19:45:02,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414783364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:02,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:02,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:45:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103390902] [2022-04-06 19:45:02,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:02,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:45:02,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:02,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:45:02,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:45:02,706 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:03,502 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-04-06 19:45:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:45:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 19:45:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:03,503 INFO L225 Difference]: With dead ends: 215 [2022-04-06 19:45:03,503 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 19:45:03,504 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:45:03,504 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 560 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:03,505 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 32 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 19:45:03,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2022-04-06 19:45:03,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-04-06 19:45:03,526 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2022-04-06 19:45:03,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:03,526 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-04-06 19:45:03,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-04-06 19:45:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:45:03,527 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:03,527 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:03,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 19:45:03,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:45:03,731 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:03,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:03,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 53 times [2022-04-06 19:45:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212604394] [2022-04-06 19:45:03,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:03,733 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:03,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 54 times [2022-04-06 19:45:03,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:03,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789389988] [2022-04-06 19:45:03,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:03,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789389988] [2022-04-06 19:45:04,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789389988] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997451108] [2022-04-06 19:45:04,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:04,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:04,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:04,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:04,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 19:45:04,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:04,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:04,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 19:45:04,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-04-06 19:45:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997451108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:04,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:04,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-04-06 19:45:04,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212604394] [2022-04-06 19:45:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212604394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:04,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:04,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:45:04,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62181041] [2022-04-06 19:45:04,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:04,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:45:04,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:04,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:45:04,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:45:04,407 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:05,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:05,316 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2022-04-06 19:45:05,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:45:05,316 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:45:05,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:05,317 INFO L225 Difference]: With dead ends: 222 [2022-04-06 19:45:05,317 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 19:45:05,318 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1426, Invalid=2480, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:45:05,319 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 593 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:05,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 32 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:05,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 19:45:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2022-04-06 19:45:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:05,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-04-06 19:45:05,345 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2022-04-06 19:45:05,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:05,345 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-04-06 19:45:05,346 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:05,346 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-04-06 19:45:05,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:45:05,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:05,346 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:05,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:05,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:05,563 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 55 times [2022-04-06 19:45:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664999853] [2022-04-06 19:45:05,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:05,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 56 times [2022-04-06 19:45:05,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:05,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37932425] [2022-04-06 19:45:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:05,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:05,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:05,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37932425] [2022-04-06 19:45:05,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37932425] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:05,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120029282] [2022-04-06 19:45:05,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:05,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:05,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:05,911 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:05,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 19:45:06,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:06,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:06,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 19:45:06,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:06,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120029282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:07,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:07,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-04-06 19:45:07,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:07,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664999853] [2022-04-06 19:45:07,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664999853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:07,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:07,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:45:07,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110497990] [2022-04-06 19:45:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:07,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:45:07,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:45:07,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:45:07,022 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:08,014 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-04-06 19:45:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:45:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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 77 [2022-04-06 19:45:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:08,016 INFO L225 Difference]: With dead ends: 229 [2022-04-06 19:45:08,016 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 19:45:08,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:45:08,017 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 641 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:08,017 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 32 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:08,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 19:45:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2022-04-06 19:45:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 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 19:45:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-04-06 19:45:08,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2022-04-06 19:45:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:08,044 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-04-06 19:45:08,044 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-04-06 19:45:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:45:08,045 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:08,045 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:08,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 19:45:08,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:08,247 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 57 times [2022-04-06 19:45:08,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:08,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695777939] [2022-04-06 19:45:08,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:08,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 58 times [2022-04-06 19:45:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379220780] [2022-04-06 19:45:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:08,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:08,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379220780] [2022-04-06 19:45:08,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379220780] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93711134] [2022-04-06 19:45:08,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:08,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:08,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:08,608 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:08,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 19:45:08,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:08,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:08,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 19:45:08,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:08,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93711134] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:09,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:09,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-04-06 19:45:09,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:09,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695777939] [2022-04-06 19:45:09,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695777939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:09,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:09,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:45:09,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248778399] [2022-04-06 19:45:09,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:09,784 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:45:09,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:09,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:45:09,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:45:09,785 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:10,876 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2022-04-06 19:45:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:45:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:45:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:10,877 INFO L225 Difference]: With dead ends: 236 [2022-04-06 19:45:10,877 INFO L226 Difference]: Without dead ends: 219 [2022-04-06 19:45:10,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:45:10,880 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 792 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:10,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 22 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-04-06 19:45:10,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2022-04-06 19:45:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-04-06 19:45:10,910 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2022-04-06 19:45:10,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:10,911 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-04-06 19:45:10,911 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-04-06 19:45:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:45:10,911 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:10,911 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:10,937 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 19:45:11,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-04-06 19:45:11,135 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 59 times [2022-04-06 19:45:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:11,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664444011] [2022-04-06 19:45:11,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:11,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:11,137 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 60 times [2022-04-06 19:45:11,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:11,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103398489] [2022-04-06 19:45:11,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:11,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:11,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103398489] [2022-04-06 19:45:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103398489] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645965378] [2022-04-06 19:45:11,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:11,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:11,534 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 19:45:11,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:11,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:11,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 19:45:11,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-04-06 19:45:11,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645965378] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:11,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:11,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-04-06 19:45:11,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:11,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664444011] [2022-04-06 19:45:11,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664444011] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:11,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:11,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:45:11,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668384497] [2022-04-06 19:45:11,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:11,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:45:11,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:45:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 19:45:11,940 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:13,034 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2022-04-06 19:45:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:45:13,034 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:45:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:13,036 INFO L225 Difference]: With dead ends: 243 [2022-04-06 19:45:13,036 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 19:45:13,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:45:13,037 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 667 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:13,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 37 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:45:13,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 19:45:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2022-04-06 19:45:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-04-06 19:45:13,069 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2022-04-06 19:45:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:13,069 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-04-06 19:45:13,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-04-06 19:45:13,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:45:13,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:13,070 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:13,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:13,284 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:13,284 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 61 times [2022-04-06 19:45:13,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:13,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2053982855] [2022-04-06 19:45:13,287 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:13,287 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 62 times [2022-04-06 19:45:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:13,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161354302] [2022-04-06 19:45:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:13,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:13,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:13,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161354302] [2022-04-06 19:45:13,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161354302] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:13,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371874332] [2022-04-06 19:45:13,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:13,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:13,750 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:13,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 19:45:13,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 19:45:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:14,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371874332] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:15,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:15,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-04-06 19:45:15,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2053982855] [2022-04-06 19:45:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2053982855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:45:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674251301] [2022-04-06 19:45:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:15,101 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:45:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:45:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:45:15,102 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:16,275 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2022-04-06 19:45:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:45:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 19:45:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:16,276 INFO L225 Difference]: With dead ends: 250 [2022-04-06 19:45:16,276 INFO L226 Difference]: Without dead ends: 233 [2022-04-06 19:45:16,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 19:45:16,278 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 856 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:16,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:16,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-04-06 19:45:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2022-04-06 19:45:16,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 81 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 19:45:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-04-06 19:45:16,310 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2022-04-06 19:45:16,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:16,311 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-04-06 19:45:16,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-04-06 19:45:16,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:45:16,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:16,311 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:16,328 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 19:45:16,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:16,512 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 63 times [2022-04-06 19:45:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2068325589] [2022-04-06 19:45:16,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:16,513 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:16,513 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 64 times [2022-04-06 19:45:16,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:16,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71451047] [2022-04-06 19:45:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:16,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:16,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:16,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71451047] [2022-04-06 19:45:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71451047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:16,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361028044] [2022-04-06 19:45:16,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:16,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:16,993 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:16,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 19:45:17,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:17,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-06 19:45:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:17,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:18,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361028044] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:18,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:18,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-04-06 19:45:18,347 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:18,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2068325589] [2022-04-06 19:45:18,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2068325589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:18,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:18,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:45:18,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721128357] [2022-04-06 19:45:18,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:18,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:45:18,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:45:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:45:18,349 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:19,722 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-04-06 19:45:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:45:19,722 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:45:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:19,723 INFO L225 Difference]: With dead ends: 257 [2022-04-06 19:45:19,723 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 19:45:19,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:45:19,724 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 741 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:19,725 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 42 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 19:45:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2022-04-06 19:45:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-04-06 19:45:19,761 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2022-04-06 19:45:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:19,762 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-04-06 19:45:19,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-04-06 19:45:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:45:19,762 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:19,762 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:19,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 19:45:19,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 19:45:19,975 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 65 times [2022-04-06 19:45:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4935988] [2022-04-06 19:45:19,977 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:19,977 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 66 times [2022-04-06 19:45:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:19,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891998584] [2022-04-06 19:45:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:19,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891998584] [2022-04-06 19:45:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891998584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066959269] [2022-04-06 19:45:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:20,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:20,452 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:20,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 19:45:20,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:20,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:20,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-04-06 19:45:20,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-04-06 19:45:20,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066959269] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:20,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:20,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-04-06 19:45:20,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4935988] [2022-04-06 19:45:20,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4935988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:20,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:20,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:45:20,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294466569] [2022-04-06 19:45:20,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:20,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:45:20,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:45:20,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 19:45:20,883 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:22,272 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2022-04-06 19:45:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 19:45:22,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:45:22,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:22,274 INFO L225 Difference]: With dead ends: 264 [2022-04-06 19:45:22,274 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 19:45:22,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:45:22,275 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 696 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:22,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 42 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 19:45:22,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2022-04-06 19:45:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-04-06 19:45:22,311 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2022-04-06 19:45:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:22,312 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-04-06 19:45:22,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-04-06 19:45:22,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:45:22,312 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:22,312 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:22,328 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 19:45:22,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 19:45:22,513 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:22,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 67 times [2022-04-06 19:45:22,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:22,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [131844693] [2022-04-06 19:45:22,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:22,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:22,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 68 times [2022-04-06 19:45:22,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542974300] [2022-04-06 19:45:22,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:22,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:23,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:23,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542974300] [2022-04-06 19:45:23,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542974300] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:23,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424296052] [2022-04-06 19:45:23,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:23,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:23,011 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 19:45:23,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 19:45:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:23,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:24,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424296052] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:24,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-04-06 19:45:24,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:24,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [131844693] [2022-04-06 19:45:24,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [131844693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:24,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:24,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:45:24,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436109904] [2022-04-06 19:45:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:24,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:45:24,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:24,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:45:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:45:24,518 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 19:45:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:25,973 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2022-04-06 19:45:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:45:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 89 [2022-04-06 19:45:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:25,974 INFO L225 Difference]: With dead ends: 271 [2022-04-06 19:45:25,974 INFO L226 Difference]: Without dead ends: 254 [2022-04-06 19:45:25,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 19:45:25,975 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:25,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [888 Valid, 32 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-04-06 19:45:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2022-04-06 19:45:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 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 19:45:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-04-06 19:45:26,018 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2022-04-06 19:45:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:26,018 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-04-06 19:45:26,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 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 19:45:26,018 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-04-06 19:45:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:45:26,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:26,019 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:26,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:26,241 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 19:45:26,242 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:26,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:26,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 69 times [2022-04-06 19:45:26,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:26,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318855732] [2022-04-06 19:45:26,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:26,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 70 times [2022-04-06 19:45:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903529417] [2022-04-06 19:45:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:26,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903529417] [2022-04-06 19:45:26,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903529417] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:26,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673012503] [2022-04-06 19:45:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:26,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:26,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:26,753 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:26,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 19:45:26,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:26,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:26,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 19:45:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:27,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673012503] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:28,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-04-06 19:45:28,334 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:28,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318855732] [2022-04-06 19:45:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318855732] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:28,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 19:45:28,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230955934] [2022-04-06 19:45:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:28,335 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 19:45:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 19:45:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:45:28,336 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:29,983 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-04-06 19:45:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:45:29,984 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:45:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:29,995 INFO L225 Difference]: With dead ends: 278 [2022-04-06 19:45:29,995 INFO L226 Difference]: Without dead ends: 261 [2022-04-06 19:45:29,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 19:45:29,999 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 798 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:30,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-04-06 19:45:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2022-04-06 19:45:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-04-06 19:45:30,030 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2022-04-06 19:45:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:30,030 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-04-06 19:45:30,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:30,031 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-04-06 19:45:30,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:45:30,031 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:30,031 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:30,048 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 19:45:30,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:30,232 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 71 times [2022-04-06 19:45:30,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:30,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892640810] [2022-04-06 19:45:30,233 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:30,233 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 72 times [2022-04-06 19:45:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:30,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373577776] [2022-04-06 19:45:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:30,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373577776] [2022-04-06 19:45:30,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373577776] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:30,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171632789] [2022-04-06 19:45:30,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:30,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:30,781 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:30,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 19:45:30,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:30,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 19:45:31,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 19:45:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171632789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:31,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:31,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-04-06 19:45:31,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892640810] [2022-04-06 19:45:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892640810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:31,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:31,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:45:31,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008742580] [2022-04-06 19:45:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:31,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:45:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:45:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:45:31,267 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:32,940 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2022-04-06 19:45:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:45:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:45:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:32,942 INFO L225 Difference]: With dead ends: 285 [2022-04-06 19:45:32,942 INFO L226 Difference]: Without dead ends: 268 [2022-04-06 19:45:32,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 19:45:32,942 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 884 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:32,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 42 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-04-06 19:45:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2022-04-06 19:45:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-04-06 19:45:32,977 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2022-04-06 19:45:32,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:32,978 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-04-06 19:45:32,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-04-06 19:45:32,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 19:45:32,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:32,978 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:32,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:33,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:45:33,179 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 73 times [2022-04-06 19:45:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:33,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138277599] [2022-04-06 19:45:33,180 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:33,180 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 74 times [2022-04-06 19:45:33,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:33,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458021828] [2022-04-06 19:45:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:33,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:33,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:33,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458021828] [2022-04-06 19:45:33,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458021828] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895568553] [2022-04-06 19:45:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:33,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:33,793 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:33,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 19:45:34,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:34,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:34,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 19:45:34,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:34,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:35,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895568553] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:35,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:35,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-04-06 19:45:35,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138277599] [2022-04-06 19:45:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138277599] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:35,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:35,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 19:45:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39485308] [2022-04-06 19:45:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:35,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 19:45:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 19:45:35,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:45:35,538 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 19:45:37,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:37,256 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2022-04-06 19:45:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:45:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 95 [2022-04-06 19:45:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:37,257 INFO L225 Difference]: With dead ends: 292 [2022-04-06 19:45:37,257 INFO L226 Difference]: Without dead ends: 275 [2022-04-06 19:45:37,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 19:45:37,258 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 727 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:37,258 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 47 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-04-06 19:45:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2022-04-06 19:45:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.053763440860215) internal successors, (98), 93 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 19:45:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-04-06 19:45:37,302 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2022-04-06 19:45:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:37,302 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-04-06 19:45:37,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 19:45:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-04-06 19:45:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 19:45:37,303 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:37,303 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:37,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:37,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 19:45:37,525 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 75 times [2022-04-06 19:45:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583326234] [2022-04-06 19:45:37,526 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:37,527 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:37,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 76 times [2022-04-06 19:45:37,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:37,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622364456] [2022-04-06 19:45:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:38,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:38,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622364456] [2022-04-06 19:45:38,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622364456] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:38,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273323810] [2022-04-06 19:45:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:38,096 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 19:45:38,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:38,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:45:38,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:38,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:40,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273323810] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:40,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:40,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-04-06 19:45:40,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:40,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583326234] [2022-04-06 19:45:40,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583326234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:40,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:40,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:45:40,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290810967] [2022-04-06 19:45:40,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:40,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:45:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:45:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:45:40,028 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:41,890 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2022-04-06 19:45:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:45:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 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 97 [2022-04-06 19:45:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:41,892 INFO L225 Difference]: With dead ends: 299 [2022-04-06 19:45:41,892 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 19:45:41,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 19:45:41,893 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 904 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:41,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 42 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 19:45:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2022-04-06 19:45:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-04-06 19:45:41,932 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2022-04-06 19:45:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:41,932 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-04-06 19:45:41,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-04-06 19:45:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 19:45:41,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:41,932 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:41,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:42,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:42,135 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 77 times [2022-04-06 19:45:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:42,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038114825] [2022-04-06 19:45:42,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:42,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 78 times [2022-04-06 19:45:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:42,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676832689] [2022-04-06 19:45:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:42,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676832689] [2022-04-06 19:45:42,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676832689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:42,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824993409] [2022-04-06 19:45:42,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:42,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:42,773 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:42,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 19:45:42,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-04-06 19:45:43,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-04-06 19:45:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824993409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:43,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:43,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-04-06 19:45:43,284 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:43,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038114825] [2022-04-06 19:45:43,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038114825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:43,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:43,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 19:45:43,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210697325] [2022-04-06 19:45:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:43,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 19:45:43,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:43,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 19:45:43,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:45:43,285 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:45,246 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2022-04-06 19:45:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 19:45:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 19:45:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:45,248 INFO L225 Difference]: With dead ends: 306 [2022-04-06 19:45:45,248 INFO L226 Difference]: Without dead ends: 289 [2022-04-06 19:45:45,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:45:45,249 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 841 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:45,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 42 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-04-06 19:45:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2022-04-06 19:45:45,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 97 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-04-06 19:45:45,289 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2022-04-06 19:45:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:45,289 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-04-06 19:45:45,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-04-06 19:45:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 19:45:45,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:45,290 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:45,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:45,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 19:45:45,490 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 79 times [2022-04-06 19:45:45,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:45,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009762688] [2022-04-06 19:45:45,492 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:45,492 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 80 times [2022-04-06 19:45:45,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:45,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743211437] [2022-04-06 19:45:45,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:45,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:46,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743211437] [2022-04-06 19:45:46,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743211437] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:46,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655052106] [2022-04-06 19:45:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:45:46,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:46,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:46,115 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:46,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 19:45:46,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:45:46,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 19:45:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:46,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:48,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655052106] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:48,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:48,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-04-06 19:45:48,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:48,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009762688] [2022-04-06 19:45:48,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009762688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:48,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:48,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:45:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529347881] [2022-04-06 19:45:48,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:48,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:45:48,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:48,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:45:48,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:45:48,077 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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 19:45:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:50,156 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-04-06 19:45:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:45:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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 101 [2022-04-06 19:45:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:50,157 INFO L225 Difference]: With dead ends: 313 [2022-04-06 19:45:50,157 INFO L226 Difference]: Without dead ends: 296 [2022-04-06 19:45:50,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 19:45:50,158 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 982 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:50,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 32 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-04-06 19:45:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2022-04-06 19:45:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 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 19:45:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-04-06 19:45:50,201 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2022-04-06 19:45:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:50,202 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-04-06 19:45:50,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 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 19:45:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-04-06 19:45:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 19:45:50,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:50,202 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:50,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 19:45:50,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:50,423 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 81 times [2022-04-06 19:45:50,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:50,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [144691403] [2022-04-06 19:45:50,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:50,425 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 82 times [2022-04-06 19:45:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:50,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85287166] [2022-04-06 19:45:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:51,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:51,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:51,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85287166] [2022-04-06 19:45:51,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85287166] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:51,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267037156] [2022-04-06 19:45:51,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:45:51,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:51,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:51,119 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:51,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 19:45:51,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:45:51,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 19:45:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:51,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:53,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267037156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:53,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:53,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-04-06 19:45:53,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:53,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [144691403] [2022-04-06 19:45:53,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [144691403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:53,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:53,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:45:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953559904] [2022-04-06 19:45:53,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:53,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:45:53,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:45:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:45:53,264 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:55,583 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-04-06 19:45:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:45:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 19:45:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:55,584 INFO L225 Difference]: With dead ends: 320 [2022-04-06 19:45:55,584 INFO L226 Difference]: Without dead ends: 303 [2022-04-06 19:45:55,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 19:45:55,585 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1034 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:55,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 37 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:45:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-04-06 19:45:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2022-04-06 19:45:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-04-06 19:45:55,635 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2022-04-06 19:45:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:55,636 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-04-06 19:45:55,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-04-06 19:45:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 19:45:55,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:55,636 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:55,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:45:55,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:55,837 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:55,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 83 times [2022-04-06 19:45:55,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:55,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948681403] [2022-04-06 19:45:55,839 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:55,839 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:55,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 84 times [2022-04-06 19:45:55,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:55,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382176374] [2022-04-06 19:45:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:56,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:45:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:45:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:45:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:45:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382176374] [2022-04-06 19:45:56,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382176374] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:45:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575226323] [2022-04-06 19:45:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:45:56,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:45:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:45:56,517 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:45:56,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 19:45:56,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:45:56,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:45:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:45:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:45:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-04-06 19:45:56,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:45:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-04-06 19:45:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575226323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:45:57,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:45:57,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-04-06 19:45:57,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:45:57,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948681403] [2022-04-06 19:45:57,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948681403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:45:57,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:45:57,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:45:57,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853546571] [2022-04-06 19:45:57,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:45:57,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:45:57,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:57,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:45:57,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 19:45:57,092 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:45:59,400 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2022-04-06 19:45:59,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:45:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 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 105 [2022-04-06 19:45:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:45:59,402 INFO L225 Difference]: With dead ends: 327 [2022-04-06 19:45:59,402 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 19:45:59,402 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 19:45:59,402 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1070 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:45:59,403 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 27 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:45:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 19:45:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2022-04-06 19:45:59,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:59,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-04-06 19:45:59,447 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2022-04-06 19:45:59,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:45:59,447 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-04-06 19:45:59,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:45:59,448 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-04-06 19:45:59,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 19:45:59,448 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:45:59,448 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:45:59,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 19:45:59,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-04-06 19:45:59,649 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:45:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:45:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 85 times [2022-04-06 19:45:59,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:45:59,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342536103] [2022-04-06 19:45:59,650 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:45:59,650 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:45:59,650 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 86 times [2022-04-06 19:45:59,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:45:59,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425650062] [2022-04-06 19:45:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:45:59,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:45:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:00,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425650062] [2022-04-06 19:46:00,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425650062] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350528951] [2022-04-06 19:46:00,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:00,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:00,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:00,393 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:00,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 19:46:00,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:00,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:00,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 19:46:00,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:00,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:02,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350528951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:02,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:02,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-04-06 19:46:02,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342536103] [2022-04-06 19:46:02,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342536103] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:02,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:02,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 19:46:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109833385] [2022-04-06 19:46:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:02,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 19:46:02,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 19:46:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 19:46:02,731 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 19:46:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:05,302 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2022-04-06 19:46:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 19:46:05,302 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 107 [2022-04-06 19:46:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:05,303 INFO L225 Difference]: With dead ends: 334 [2022-04-06 19:46:05,303 INFO L226 Difference]: Without dead ends: 317 [2022-04-06 19:46:05,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 19:46:05,304 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 924 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:05,305 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 32 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-04-06 19:46:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2022-04-06 19:46:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 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 19:46:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-04-06 19:46:05,362 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2022-04-06 19:46:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:05,362 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-04-06 19:46:05,362 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 19:46:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-04-06 19:46:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 19:46:05,363 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:05,363 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:05,380 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 19:46:05,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 19:46:05,563 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 87 times [2022-04-06 19:46:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199594873] [2022-04-06 19:46:05,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:05,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:05,565 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 88 times [2022-04-06 19:46:05,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:05,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811490435] [2022-04-06 19:46:05,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:06,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:06,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:06,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811490435] [2022-04-06 19:46:06,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811490435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:06,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379055921] [2022-04-06 19:46:06,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:06,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:06,333 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:06,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 19:46:06,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:06,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 19:46:06,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:06,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:08,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379055921] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:08,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:08,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-04-06 19:46:08,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:08,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199594873] [2022-04-06 19:46:08,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199594873] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:08,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:08,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:46:08,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686325955] [2022-04-06 19:46:08,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:08,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:46:08,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:46:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:46:08,633 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:11,341 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2022-04-06 19:46:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:46:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 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 109 [2022-04-06 19:46:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:11,342 INFO L225 Difference]: With dead ends: 341 [2022-04-06 19:46:11,342 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 19:46:11,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 19:46:11,343 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1004 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:11,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 57 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 19:46:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2022-04-06 19:46:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-04-06 19:46:11,412 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2022-04-06 19:46:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:11,412 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-04-06 19:46:11,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-04-06 19:46:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 19:46:11,413 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:11,413 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:11,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:11,637 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 19:46:11,637 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 89 times [2022-04-06 19:46:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1937633484] [2022-04-06 19:46:11,639 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:11,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 90 times [2022-04-06 19:46:11,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:11,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053110842] [2022-04-06 19:46:11,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:11,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053110842] [2022-04-06 19:46:12,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053110842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:12,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810617201] [2022-04-06 19:46:12,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:12,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:12,399 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:12,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 19:46:12,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:46:12,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:46:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-04-06 19:46:12,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-04-06 19:46:12,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810617201] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:12,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:12,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-04-06 19:46:12,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1937633484] [2022-04-06 19:46:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1937633484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:12,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:12,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 19:46:12,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042871983] [2022-04-06 19:46:12,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:12,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 19:46:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 19:46:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 19:46:12,995 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:15,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:15,709 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2022-04-06 19:46:15,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 19:46:15,710 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 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 111 [2022-04-06 19:46:15,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:15,711 INFO L225 Difference]: With dead ends: 348 [2022-04-06 19:46:15,711 INFO L226 Difference]: Without dead ends: 331 [2022-04-06 19:46:15,711 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 19:46:15,712 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1206 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:15,712 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 37 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:15,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-04-06 19:46:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2022-04-06 19:46:15,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-04-06 19:46:15,763 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2022-04-06 19:46:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:15,763 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-04-06 19:46:15,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:15,764 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-04-06 19:46:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 19:46:15,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:15,764 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:15,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 19:46:15,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:15,965 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 91 times [2022-04-06 19:46:15,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:15,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590516562] [2022-04-06 19:46:15,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:15,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:15,967 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 92 times [2022-04-06 19:46:15,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:15,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768891429] [2022-04-06 19:46:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:16,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768891429] [2022-04-06 19:46:16,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768891429] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:16,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177741178] [2022-04-06 19:46:16,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:16,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:16,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:16,751 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:16,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 19:46:16,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 19:46:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:17,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:19,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177741178] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:19,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:19,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-04-06 19:46:19,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590516562] [2022-04-06 19:46:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590516562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:19,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:19,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 19:46:19,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536794869] [2022-04-06 19:46:19,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:19,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 19:46:19,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 19:46:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 19:46:19,214 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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 19:46:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:22,133 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2022-04-06 19:46:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 19:46:22,134 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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 113 [2022-04-06 19:46:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:22,135 INFO L225 Difference]: With dead ends: 355 [2022-04-06 19:46:22,135 INFO L226 Difference]: Without dead ends: 338 [2022-04-06 19:46:22,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 19:46:22,136 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1023 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:22,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1023 Valid, 37 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-04-06 19:46:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-04-06 19:46:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.045045045045045) internal successors, (116), 111 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 19:46:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-04-06 19:46:22,193 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2022-04-06 19:46:22,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:22,193 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-04-06 19:46:22,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 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 19:46:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-04-06 19:46:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 19:46:22,194 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:22,194 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:22,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 19:46:22,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:46:22,416 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 93 times [2022-04-06 19:46:22,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:22,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1740024458] [2022-04-06 19:46:22,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:22,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 94 times [2022-04-06 19:46:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:22,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288331275] [2022-04-06 19:46:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:23,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288331275] [2022-04-06 19:46:23,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288331275] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:23,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925561929] [2022-04-06 19:46:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:23,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:23,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:23,214 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:23,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 19:46:23,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:23,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 19:46:23,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:23,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:25,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925561929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:25,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:25,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-04-06 19:46:25,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:25,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1740024458] [2022-04-06 19:46:25,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1740024458] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:25,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:25,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 19:46:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157976281] [2022-04-06 19:46:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:25,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 19:46:25,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 19:46:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 19:46:25,755 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:28,836 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2022-04-06 19:46:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 19:46:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 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 115 [2022-04-06 19:46:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:28,837 INFO L225 Difference]: With dead ends: 362 [2022-04-06 19:46:28,837 INFO L226 Difference]: Without dead ends: 345 [2022-04-06 19:46:28,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 19:46:28,839 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 993 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:28,839 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 62 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-04-06 19:46:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2022-04-06 19:46:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-04-06 19:46:28,892 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2022-04-06 19:46:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:28,892 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-04-06 19:46:28,892 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-04-06 19:46:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 19:46:28,893 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:28,893 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:28,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 19:46:29,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 19:46:29,100 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 95 times [2022-04-06 19:46:29,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806678679] [2022-04-06 19:46:29,101 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:29,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 96 times [2022-04-06 19:46:29,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:29,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33348910] [2022-04-06 19:46:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:29,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:29,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33348910] [2022-04-06 19:46:29,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33348910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:29,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117388706] [2022-04-06 19:46:29,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:29,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:29,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:29,978 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:29,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 19:46:30,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:46:30,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:30,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:46:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:30,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-04-06 19:46:30,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-04-06 19:46:30,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117388706] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:30,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:30,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-04-06 19:46:30,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:30,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806678679] [2022-04-06 19:46:30,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806678679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:30,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:30,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 19:46:30,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271449458] [2022-04-06 19:46:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:30,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 19:46:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 19:46:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:46:30,583 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:33,787 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2022-04-06 19:46:33,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 19:46:33,787 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 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 117 [2022-04-06 19:46:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:33,788 INFO L225 Difference]: With dead ends: 369 [2022-04-06 19:46:33,788 INFO L226 Difference]: Without dead ends: 352 [2022-04-06 19:46:33,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 19:46:33,789 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1560 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:33,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 27 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-04-06 19:46:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2022-04-06 19:46:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-04-06 19:46:33,850 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-04-06 19:46:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:33,850 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-04-06 19:46:33,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-04-06 19:46:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 19:46:33,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:33,850 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:33,867 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 19:46:34,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:34,051 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 97 times [2022-04-06 19:46:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:34,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437385127] [2022-04-06 19:46:34,053 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:34,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 98 times [2022-04-06 19:46:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:34,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941910907] [2022-04-06 19:46:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:34,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:34,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:34,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941910907] [2022-04-06 19:46:34,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941910907] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:34,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477613710] [2022-04-06 19:46:34,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:34,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:34,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:34,920 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:34,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 19:46:35,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 19:46:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:35,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:37,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477613710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:37,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:37,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 19:46:37,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:37,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437385127] [2022-04-06 19:46:37,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437385127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:37,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:37,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 19:46:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054105585] [2022-04-06 19:46:37,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:37,705 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 19:46:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 19:46:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 19:46:37,707 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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 19:46:41,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:41,169 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2022-04-06 19:46:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 19:46:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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 119 [2022-04-06 19:46:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:41,170 INFO L225 Difference]: With dead ends: 376 [2022-04-06 19:46:41,170 INFO L226 Difference]: Without dead ends: 359 [2022-04-06 19:46:41,171 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 19:46:41,172 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1083 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:41,172 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 47 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-04-06 19:46:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2022-04-06 19:46:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 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 19:46:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-04-06 19:46:41,232 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2022-04-06 19:46:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:41,232 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-04-06 19:46:41,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 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 19:46:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-04-06 19:46:41,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 19:46:41,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:41,233 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:41,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 19:46:41,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 19:46:41,434 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:41,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:41,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 99 times [2022-04-06 19:46:41,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:41,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1628324644] [2022-04-06 19:46:41,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:41,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 100 times [2022-04-06 19:46:41,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441362225] [2022-04-06 19:46:41,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:41,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:42,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:42,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441362225] [2022-04-06 19:46:42,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441362225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:42,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195471161] [2022-04-06 19:46:42,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:46:42,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:42,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:42,379 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:42,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 19:46:42,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:46:42,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:46:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:42,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195471161] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:45,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-04-06 19:46:45,324 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:45,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1628324644] [2022-04-06 19:46:45,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1628324644] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:45,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:45,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 19:46:45,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478432444] [2022-04-06 19:46:45,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:45,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 19:46:45,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:45,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 19:46:45,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 19:46:45,326 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:48,921 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2022-04-06 19:46:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 19:46:48,922 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 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 121 [2022-04-06 19:46:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:48,923 INFO L225 Difference]: With dead ends: 383 [2022-04-06 19:46:48,923 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 19:46:48,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 19:46:48,924 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1454 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:48,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 42 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:48,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 19:46:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2022-04-06 19:46:48,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0420168067226891) internal successors, (124), 119 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-04-06 19:46:48,987 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2022-04-06 19:46:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:48,987 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-04-06 19:46:48,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0943396226415096) internal successors, (111), 52 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-04-06 19:46:48,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 19:46:48,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:48,988 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:49,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 19:46:49,192 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:49,192 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 101 times [2022-04-06 19:46:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:49,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906857422] [2022-04-06 19:46:49,194 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:49,194 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 102 times [2022-04-06 19:46:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908623164] [2022-04-06 19:46:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:50,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908623164] [2022-04-06 19:46:50,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908623164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:50,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882465186] [2022-04-06 19:46:50,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:46:50,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:50,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:50,103 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:50,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 19:46:50,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:46:50,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:46:50,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-04-06 19:46:50,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-04-06 19:46:50,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882465186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:50,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:50,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-04-06 19:46:50,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906857422] [2022-04-06 19:46:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906857422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:50,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:50,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 19:46:50,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725397475] [2022-04-06 19:46:50,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:50,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 19:46:50,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:50,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 19:46:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 19:46:50,761 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:54,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:46:54,549 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2022-04-06 19:46:54,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 19:46:54,549 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 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 123 [2022-04-06 19:46:54,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:46:54,550 INFO L225 Difference]: With dead ends: 390 [2022-04-06 19:46:54,550 INFO L226 Difference]: Without dead ends: 373 [2022-04-06 19:46:54,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 19:46:54,551 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1435 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1435 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:46:54,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1435 Valid, 37 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:46:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-04-06 19:46:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2022-04-06 19:46:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-04-06 19:46:54,627 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2022-04-06 19:46:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:46:54,628 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-04-06 19:46:54,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:46:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-04-06 19:46:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 19:46:54,628 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:46:54,628 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:46:54,645 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 19:46:54,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-04-06 19:46:54,829 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:46:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:46:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 103 times [2022-04-06 19:46:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:54,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277224313] [2022-04-06 19:46:54,830 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:46:54,830 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:46:54,830 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 104 times [2022-04-06 19:46:54,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:46:54,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542099588] [2022-04-06 19:46:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:46:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:46:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:55,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:46:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:46:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:46:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542099588] [2022-04-06 19:46:55,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542099588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:46:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452820956] [2022-04-06 19:46:55,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:46:55,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:46:55,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:46:55,823 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:46:55,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 19:46:56,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:46:56,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:46:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 19:46:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:46:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:56,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:46:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:46:58,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452820956] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:46:58,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:46:58,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-04-06 19:46:58,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:46:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277224313] [2022-04-06 19:46:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277224313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:46:58,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:46:58,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 19:46:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080667312] [2022-04-06 19:46:58,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:46:58,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 19:46:58,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:46:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 19:46:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 19:46:58,975 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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 19:47:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:02,965 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2022-04-06 19:47:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 19:47:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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 125 [2022-04-06 19:47:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:02,966 INFO L225 Difference]: With dead ends: 397 [2022-04-06 19:47:02,966 INFO L226 Difference]: Without dead ends: 380 [2022-04-06 19:47:02,967 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 19:47:02,967 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:02,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1100 Valid, 47 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-04-06 19:47:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2022-04-06 19:47:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 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 19:47:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-04-06 19:47:03,042 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2022-04-06 19:47:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:03,042 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-04-06 19:47:03,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 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 19:47:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-04-06 19:47:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 19:47:03,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:03,043 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:03,060 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 19:47:03,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 19:47:03,243 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 105 times [2022-04-06 19:47:03,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780382525] [2022-04-06 19:47:03,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:03,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 106 times [2022-04-06 19:47:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:03,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117330860] [2022-04-06 19:47:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:03,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:04,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:04,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:04,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117330860] [2022-04-06 19:47:04,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117330860] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:04,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914563515] [2022-04-06 19:47:04,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:04,198 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:04,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 19:47:04,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 19:47:04,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:04,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:07,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914563515] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:07,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:07,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-04-06 19:47:07,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:07,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780382525] [2022-04-06 19:47:07,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780382525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:07,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:07,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 19:47:07,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484928042] [2022-04-06 19:47:07,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:07,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 19:47:07,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 19:47:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 19:47:07,399 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:11,671 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-04-06 19:47:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 19:47:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 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 127 [2022-04-06 19:47:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:11,676 INFO L225 Difference]: With dead ends: 404 [2022-04-06 19:47:11,676 INFO L226 Difference]: Without dead ends: 387 [2022-04-06 19:47:11,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 19:47:11,677 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1301 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:11,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 37 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-04-06 19:47:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2022-04-06 19:47:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-04-06 19:47:11,749 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2022-04-06 19:47:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:11,750 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-04-06 19:47:11,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 55 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:11,750 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-04-06 19:47:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 19:47:11,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:11,750 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:11,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 19:47:11,950 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:11,951 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:11,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:11,951 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 107 times [2022-04-06 19:47:11,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:11,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295847630] [2022-04-06 19:47:11,952 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:11,952 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:11,953 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 108 times [2022-04-06 19:47:11,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:11,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488555623] [2022-04-06 19:47:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:11,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:12,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488555623] [2022-04-06 19:47:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488555623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:12,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769405323] [2022-04-06 19:47:12,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:12,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:12,974 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:12,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 19:47:13,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:47:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:47:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-04-06 19:47:13,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-04-06 19:47:13,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769405323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:13,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:13,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-04-06 19:47:13,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:13,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295847630] [2022-04-06 19:47:13,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295847630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:13,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:13,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 19:47:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943217532] [2022-04-06 19:47:13,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:13,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 19:47:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 19:47:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 19:47:13,672 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:18,119 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2022-04-06 19:47:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 19:47:18,119 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 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 129 [2022-04-06 19:47:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:18,120 INFO L225 Difference]: With dead ends: 411 [2022-04-06 19:47:18,120 INFO L226 Difference]: Without dead ends: 394 [2022-04-06 19:47:18,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 19:47:18,121 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1238 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:18,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1238 Valid, 37 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:47:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-06 19:47:18,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2022-04-06 19:47:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 127 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-04-06 19:47:18,196 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2022-04-06 19:47:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:18,196 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-04-06 19:47:18,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-04-06 19:47:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 19:47:18,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:18,196 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:18,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 19:47:18,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:18,397 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 109 times [2022-04-06 19:47:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:18,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [668935959] [2022-04-06 19:47:18,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:18,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:18,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 110 times [2022-04-06 19:47:18,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:18,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260299090] [2022-04-06 19:47:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:18,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:19,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:19,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:19,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260299090] [2022-04-06 19:47:19,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260299090] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:19,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870395372] [2022-04-06 19:47:19,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:19,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:19,504 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:19,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 19:47:19,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 19:47:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:20,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870395372] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:22,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-04-06 19:47:22,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [668935959] [2022-04-06 19:47:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [668935959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:22,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:22,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 19:47:22,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566383352] [2022-04-06 19:47:22,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:22,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 19:47:22,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:22,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 19:47:22,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 19:47:22,926 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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 19:47:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:27,771 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2022-04-06 19:47:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 19:47:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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 131 [2022-04-06 19:47:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:27,773 INFO L225 Difference]: With dead ends: 418 [2022-04-06 19:47:27,773 INFO L226 Difference]: Without dead ends: 401 [2022-04-06 19:47:27,774 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 19:47:27,774 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1614 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1614 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:27,774 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 27 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:47:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-04-06 19:47:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2022-04-06 19:47:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 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 19:47:27,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-04-06 19:47:27,858 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2022-04-06 19:47:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:27,859 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-04-06 19:47:27,859 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 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 19:47:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-04-06 19:47:27,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 19:47:27,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:27,859 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:27,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 19:47:28,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:28,060 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:28,060 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 111 times [2022-04-06 19:47:28,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450712651] [2022-04-06 19:47:28,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:28,061 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 112 times [2022-04-06 19:47:28,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:28,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137979094] [2022-04-06 19:47:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:28,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:29,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:29,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137979094] [2022-04-06 19:47:29,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137979094] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:29,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522000668] [2022-04-06 19:47:29,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:29,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:29,145 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:29,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 19:47:29,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:29,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 19:47:29,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:29,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522000668] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:32,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:32,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-04-06 19:47:32,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:32,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450712651] [2022-04-06 19:47:32,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450712651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:32,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:32,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 19:47:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978827958] [2022-04-06 19:47:32,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:32,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 19:47:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 19:47:32,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 19:47:32,696 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:37,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:37,753 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-04-06 19:47:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 19:47:37,753 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 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 133 [2022-04-06 19:47:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:37,754 INFO L225 Difference]: With dead ends: 425 [2022-04-06 19:47:37,754 INFO L226 Difference]: Without dead ends: 408 [2022-04-06 19:47:37,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-04-06 19:47:37,756 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1328 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:37,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 37 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:47:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-04-06 19:47:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2022-04-06 19:47:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 131 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-04-06 19:47:37,844 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2022-04-06 19:47:37,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:37,844 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-04-06 19:47:37,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 58 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:37,844 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-04-06 19:47:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 19:47:37,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:37,845 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:37,862 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 19:47:38,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 19:47:38,045 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:38,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 113 times [2022-04-06 19:47:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:38,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2036299866] [2022-04-06 19:47:38,046 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:38,046 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 114 times [2022-04-06 19:47:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:38,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990358653] [2022-04-06 19:47:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:38,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:39,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:39,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990358653] [2022-04-06 19:47:39,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990358653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187841968] [2022-04-06 19:47:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:47:39,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:39,135 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 19:47:39,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:47:39,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:47:39,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-04-06 19:47:39,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-04-06 19:47:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187841968] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:39,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:39,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-04-06 19:47:39,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:39,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2036299866] [2022-04-06 19:47:39,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2036299866] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:39,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:39,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 19:47:39,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419362451] [2022-04-06 19:47:39,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:39,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 19:47:39,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 19:47:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 19:47:39,859 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:45,047 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2022-04-06 19:47:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 19:47:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 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 135 [2022-04-06 19:47:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:45,049 INFO L225 Difference]: With dead ends: 432 [2022-04-06 19:47:45,049 INFO L226 Difference]: Without dead ends: 415 [2022-04-06 19:47:45,049 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 19:47:45,050 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:45,050 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 47 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:47:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-04-06 19:47:45,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2022-04-06 19:47:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-04-06 19:47:45,141 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2022-04-06 19:47:45,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:45,141 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-04-06 19:47:45,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:45,141 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-04-06 19:47:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 19:47:45,142 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:45,142 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:45,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 19:47:45,342 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 19:47:45,342 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 115 times [2022-04-06 19:47:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:45,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779475619] [2022-04-06 19:47:45,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:45,344 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 116 times [2022-04-06 19:47:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490616019] [2022-04-06 19:47:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:46,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:46,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490616019] [2022-04-06 19:47:46,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490616019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83892524] [2022-04-06 19:47:46,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:47:46,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:46,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:46,467 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:46,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 19:47:46,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:47:46,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 19:47:46,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:47,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:47:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:50,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83892524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:47:50,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:47:50,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-04-06 19:47:50,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779475619] [2022-04-06 19:47:50,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779475619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:50,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:50,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 19:47:50,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337658526] [2022-04-06 19:47:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:50,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 19:47:50,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 19:47:50,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 19:47:50,179 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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 19:47:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:55,740 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2022-04-06 19:47:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 19:47:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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 137 [2022-04-06 19:47:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:55,742 INFO L225 Difference]: With dead ends: 439 [2022-04-06 19:47:55,742 INFO L226 Difference]: Without dead ends: 422 [2022-04-06 19:47:55,743 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 19:47:55,743 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1574 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:55,744 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 22 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:47:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-04-06 19:47:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2022-04-06 19:47:55,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 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 19:47:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-04-06 19:47:55,842 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2022-04-06 19:47:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:55,843 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-04-06 19:47:55,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 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 19:47:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-04-06 19:47:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 19:47:55,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:55,843 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:55,861 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 19:47:56,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:56,044 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:56,044 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 117 times [2022-04-06 19:47:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741947184] [2022-04-06 19:47:56,045 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:47:56,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:56,045 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 118 times [2022-04-06 19:47:56,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:56,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201215927] [2022-04-06 19:47:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:56,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:57,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:57,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201215927] [2022-04-06 19:47:57,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201215927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:47:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335063445] [2022-04-06 19:47:57,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:47:57,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:47:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:57,195 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:47:57,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 19:47:57,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:47:57,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:47:57,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 19:47:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:47:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:47:57,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:01,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335063445] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:01,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:01,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-04-06 19:48:01,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:01,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741947184] [2022-04-06 19:48:01,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741947184] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:01,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:01,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 19:48:01,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335556518] [2022-04-06 19:48:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:01,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 19:48:01,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:01,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 19:48:01,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 19:48:01,060 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:06,913 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2022-04-06 19:48:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 19:48:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 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 139 [2022-04-06 19:48:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:06,915 INFO L225 Difference]: With dead ends: 446 [2022-04-06 19:48:06,915 INFO L226 Difference]: Without dead ends: 429 [2022-04-06 19:48:06,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 19:48:06,916 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1403 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:06,917 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 42 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-04-06 19:48:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2022-04-06 19:48:07,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-04-06 19:48:07,008 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2022-04-06 19:48:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:07,008 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-04-06 19:48:07,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 61 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-04-06 19:48:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 19:48:07,009 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:07,009 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:07,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:07,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:07,209 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:07,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 119 times [2022-04-06 19:48:07,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:07,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796968577] [2022-04-06 19:48:07,211 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:48:07,211 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:07,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 120 times [2022-04-06 19:48:07,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:07,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687590948] [2022-04-06 19:48:07,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:07,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687590948] [2022-04-06 19:48:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687590948] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619821348] [2022-04-06 19:48:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:08,435 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:08,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 19:48:08,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:48:08,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-04-06 19:48:08,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:09,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-04-06 19:48:09,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619821348] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:09,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:09,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-04-06 19:48:09,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:09,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796968577] [2022-04-06 19:48:09,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796968577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:09,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:09,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 19:48:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629644801] [2022-04-06 19:48:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:09,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 19:48:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 19:48:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:48:09,230 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:15,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:15,290 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2022-04-06 19:48:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 19:48:15,290 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 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 141 [2022-04-06 19:48:15,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:15,291 INFO L225 Difference]: With dead ends: 453 [2022-04-06 19:48:15,291 INFO L226 Difference]: Without dead ends: 436 [2022-04-06 19:48:15,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 19:48:15,292 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1884 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:15,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1884 Valid, 37 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-04-06 19:48:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2022-04-06 19:48:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 139 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-04-06 19:48:15,386 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2022-04-06 19:48:15,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:15,386 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-04-06 19:48:15,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-04-06 19:48:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 19:48:15,387 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:15,387 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:15,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 19:48:15,593 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:15,593 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:15,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:15,593 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 121 times [2022-04-06 19:48:15,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:15,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [268046334] [2022-04-06 19:48:15,594 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:48:15,594 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:15,594 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 122 times [2022-04-06 19:48:15,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:15,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614865909] [2022-04-06 19:48:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:15,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:16,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:16,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614865909] [2022-04-06 19:48:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614865909] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:16,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388531109] [2022-04-06 19:48:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:16,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:16,837 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:16,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 19:48:17,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 19:48:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:17,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:20,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388531109] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:20,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-04-06 19:48:20,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [268046334] [2022-04-06 19:48:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [268046334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:20,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:20,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 19:48:20,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126906905] [2022-04-06 19:48:20,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:20,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 19:48:20,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 19:48:20,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 19:48:20,940 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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 19:48:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:27,449 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2022-04-06 19:48:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 19:48:27,449 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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 143 [2022-04-06 19:48:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:27,450 INFO L225 Difference]: With dead ends: 460 [2022-04-06 19:48:27,450 INFO L226 Difference]: Without dead ends: 443 [2022-04-06 19:48:27,452 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 19:48:27,452 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1379 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:27,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 52 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-04-06 19:48:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2022-04-06 19:48:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 141 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 19:48:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-04-06 19:48:27,560 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2022-04-06 19:48:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:27,560 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-04-06 19:48:27,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 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 19:48:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-04-06 19:48:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 19:48:27,561 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:27,561 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:27,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 19:48:27,761 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:27,762 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 123 times [2022-04-06 19:48:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:27,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168904666] [2022-04-06 19:48:27,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:48:27,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 124 times [2022-04-06 19:48:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842440283] [2022-04-06 19:48:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:27,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:29,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842440283] [2022-04-06 19:48:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842440283] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217186277] [2022-04-06 19:48:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:29,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:29,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:29,022 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:29,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 19:48:29,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:29,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:29,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:48:29,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:29,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:29,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217186277] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:33,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-04-06 19:48:33,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:33,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168904666] [2022-04-06 19:48:33,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168904666] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 19:48:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413126286] [2022-04-06 19:48:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:33,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 19:48:33,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 19:48:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 19:48:33,332 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:40,130 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2022-04-06 19:48:40,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 19:48:40,130 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 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 145 [2022-04-06 19:48:40,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:40,132 INFO L225 Difference]: With dead ends: 467 [2022-04-06 19:48:40,132 INFO L226 Difference]: Without dead ends: 450 [2022-04-06 19:48:40,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 19:48:40,133 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1882 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1882 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:40,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1882 Valid, 27 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-06 19:48:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2022-04-06 19:48:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-04-06 19:48:40,299 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2022-04-06 19:48:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:40,299 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-04-06 19:48:40,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.076923076923077) internal successors, (135), 64 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-04-06 19:48:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 19:48:40,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:40,300 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:40,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:40,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 19:48:40,519 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:40,520 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 125 times [2022-04-06 19:48:40,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:40,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1855861371] [2022-04-06 19:48:40,521 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:48:40,521 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 126 times [2022-04-06 19:48:40,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:40,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482170939] [2022-04-06 19:48:40,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:40,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:41,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:41,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482170939] [2022-04-06 19:48:41,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482170939] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406011524] [2022-04-06 19:48:41,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:41,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:41,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:41,826 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:41,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 19:48:42,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:48:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-04-06 19:48:42,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-04-06 19:48:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406011524] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:42,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-04-06 19:48:42,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1855861371] [2022-04-06 19:48:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1855861371] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:42,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 19:48:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68977266] [2022-04-06 19:48:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:42,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 19:48:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 19:48:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:48:42,664 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:49,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:49,611 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2022-04-06 19:48:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 19:48:49,611 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 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 147 [2022-04-06 19:48:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:49,613 INFO L225 Difference]: With dead ends: 474 [2022-04-06 19:48:49,613 INFO L226 Difference]: Without dead ends: 457 [2022-04-06 19:48:49,613 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 19:48:49,614 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1476 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:49,614 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 47 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-04-06 19:48:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2022-04-06 19:48:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-04-06 19:48:49,734 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2022-04-06 19:48:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:49,734 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-04-06 19:48:49,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-04-06 19:48:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 19:48:49,735 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:49,735 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:49,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 19:48:49,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:49,939 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 127 times [2022-04-06 19:48:49,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [66779415] [2022-04-06 19:48:49,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:48:49,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 128 times [2022-04-06 19:48:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165864416] [2022-04-06 19:48:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:51,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:51,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165864416] [2022-04-06 19:48:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165864416] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619806475] [2022-04-06 19:48:51,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:51,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:51,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:51,313 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:48:51,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 19:48:51,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:51,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:51,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 19:48:51,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:52,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:48:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619806475] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:55,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-04-06 19:48:55,920 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:55,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [66779415] [2022-04-06 19:48:55,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [66779415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:55,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 19:48:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461554] [2022-04-06 19:48:55,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:55,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 19:48:55,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 19:48:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-04-06 19:48:55,925 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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 19:49:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:03,444 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2022-04-06 19:49:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 19:49:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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 149 [2022-04-06 19:49:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:03,446 INFO L225 Difference]: With dead ends: 481 [2022-04-06 19:49:03,446 INFO L226 Difference]: Without dead ends: 464 [2022-04-06 19:49:03,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-04-06 19:49:03,448 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1568 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:03,448 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 52 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:49:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-04-06 19:49:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2022-04-06 19:49:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 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 19:49:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-04-06 19:49:03,586 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2022-04-06 19:49:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:03,587 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-04-06 19:49:03,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 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 19:49:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-04-06 19:49:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 19:49:03,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:03,587 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:03,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 19:49:03,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-04-06 19:49:03,803 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 129 times [2022-04-06 19:49:03,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:03,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787771681] [2022-04-06 19:49:03,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:49:03,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 130 times [2022-04-06 19:49:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:03,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708483995] [2022-04-06 19:49:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:03,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:05,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:05,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708483995] [2022-04-06 19:49:05,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708483995] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925306680] [2022-04-06 19:49:05,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:05,185 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:05,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 19:49:05,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:05,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 19:49:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:05,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925306680] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:09,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:09,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 19:49:09,962 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787771681] [2022-04-06 19:49:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787771681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:09,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:09,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 19:49:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202744682] [2022-04-06 19:49:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:09,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 19:49:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 19:49:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 19:49:09,965 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:17,841 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2022-04-06 19:49:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 19:49:17,842 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 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 151 [2022-04-06 19:49:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:17,844 INFO L225 Difference]: With dead ends: 488 [2022-04-06 19:49:17,844 INFO L226 Difference]: Without dead ends: 471 [2022-04-06 19:49:17,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 19:49:17,846 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1648 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:17,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1648 Valid, 42 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:49:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-04-06 19:49:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2022-04-06 19:49:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-04-06 19:49:17,965 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2022-04-06 19:49:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:17,966 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-04-06 19:49:17,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.073529411764706) internal successors, (141), 67 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-04-06 19:49:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 19:49:17,966 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:17,966 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:17,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 19:49:18,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 19:49:18,167 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 131 times [2022-04-06 19:49:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433058348] [2022-04-06 19:49:18,168 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:49:18,168 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 132 times [2022-04-06 19:49:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:18,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675181692] [2022-04-06 19:49:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:18,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:19,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:19,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675181692] [2022-04-06 19:49:19,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675181692] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:19,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042816915] [2022-04-06 19:49:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:19,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:19,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:19,610 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:19,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 19:49:19,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:49:20,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:49:20,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-04-06 19:49:20,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:20,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-04-06 19:49:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042816915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:20,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:20,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-04-06 19:49:20,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:20,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433058348] [2022-04-06 19:49:20,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433058348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:20,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:20,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 19:49:20,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115163863] [2022-04-06 19:49:20,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:20,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 19:49:20,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:20,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 19:49:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 19:49:20,544 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:28,549 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2022-04-06 19:49:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 19:49:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 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 153 [2022-04-06 19:49:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:28,551 INFO L225 Difference]: With dead ends: 495 [2022-04-06 19:49:28,551 INFO L226 Difference]: Without dead ends: 478 [2022-04-06 19:49:28,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 19:49:28,554 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1462 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:28,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 57 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:49:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-04-06 19:49:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2022-04-06 19:49:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-04-06 19:49:28,673 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2022-04-06 19:49:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:28,673 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-04-06 19:49:28,673 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-04-06 19:49:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 19:49:28,674 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:28,674 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:28,691 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 19:49:28,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 19:49:28,874 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:28,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:28,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 133 times [2022-04-06 19:49:28,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:28,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [616884340] [2022-04-06 19:49:28,875 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:49:28,875 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 134 times [2022-04-06 19:49:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927763519] [2022-04-06 19:49:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:30,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927763519] [2022-04-06 19:49:30,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927763519] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554152675] [2022-04-06 19:49:30,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:30,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:30,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:30,342 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:30,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 19:49:30,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:30,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 19:49:30,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:31,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554152675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:35,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:35,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-04-06 19:49:35,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [616884340] [2022-04-06 19:49:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [616884340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:35,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:35,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 19:49:35,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684568362] [2022-04-06 19:49:35,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:35,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 19:49:35,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:35,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 19:49:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 19:49:35,250 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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 19:49:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:43,898 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2022-04-06 19:49:43,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 19:49:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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 155 [2022-04-06 19:49:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:43,900 INFO L225 Difference]: With dead ends: 502 [2022-04-06 19:49:43,900 INFO L226 Difference]: Without dead ends: 485 [2022-04-06 19:49:43,901 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 19:49:43,902 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1610 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:43,902 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 42 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:49:43,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-04-06 19:49:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2022-04-06 19:49:44,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 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 19:49:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-04-06 19:49:44,023 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2022-04-06 19:49:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:44,023 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-04-06 19:49:44,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 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 19:49:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-04-06 19:49:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 19:49:44,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:44,024 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:44,044 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 19:49:44,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 19:49:44,231 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:44,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 135 times [2022-04-06 19:49:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:44,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1614493464] [2022-04-06 19:49:44,232 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:49:44,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:44,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 136 times [2022-04-06 19:49:44,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:44,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280642961] [2022-04-06 19:49:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:44,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:45,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:45,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:45,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280642961] [2022-04-06 19:49:45,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280642961] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:45,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046668354] [2022-04-06 19:49:45,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:45,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:45,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:45,748 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:49:45,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 19:49:46,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 19:49:46,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:46,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:49:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046668354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:50,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:50,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-06 19:49:50,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:50,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1614493464] [2022-04-06 19:49:50,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1614493464] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:50,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:50,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 19:49:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541353619] [2022-04-06 19:49:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:50,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 19:49:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 19:49:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 19:49:50,818 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:59,867 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2022-04-06 19:49:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 19:49:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 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 157 [2022-04-06 19:49:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:59,868 INFO L225 Difference]: With dead ends: 509 [2022-04-06 19:49:59,868 INFO L226 Difference]: Without dead ends: 492 [2022-04-06 19:49:59,870 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 19:49:59,870 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1556 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1556 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:59,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 47 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:49:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-04-06 19:49:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2022-04-06 19:49:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-04-06 19:49:59,997 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2022-04-06 19:49:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:59,997 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-04-06 19:49:59,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0704225352112675) internal successors, (147), 70 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-04-06 19:49:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 19:49:59,998 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:59,998 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:00,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 19:50:00,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:00,198 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:00,199 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 137 times [2022-04-06 19:50:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200220473] [2022-04-06 19:50:00,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:00,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:00,200 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 138 times [2022-04-06 19:50:00,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:00,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559700844] [2022-04-06 19:50:00,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:00,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:01,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:01,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559700844] [2022-04-06 19:50:01,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559700844] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228695004] [2022-04-06 19:50:01,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:01,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:01,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:01,787 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:01,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 19:50:02,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:50:02,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:02,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:50:02,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-04-06 19:50:02,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-04-06 19:50:02,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228695004] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:02,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:02,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-04-06 19:50:02,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:02,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200220473] [2022-04-06 19:50:02,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200220473] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:02,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:02,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 19:50:02,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121782666] [2022-04-06 19:50:02,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:02,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 19:50:02,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 19:50:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 19:50:02,760 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:12,147 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2022-04-06 19:50:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 19:50:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 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 159 [2022-04-06 19:50:12,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:12,149 INFO L225 Difference]: With dead ends: 516 [2022-04-06 19:50:12,149 INFO L226 Difference]: Without dead ends: 499 [2022-04-06 19:50:12,150 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 19:50:12,150 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:12,150 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 32 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:50:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-04-06 19:50:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2022-04-06 19:50:12,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 157 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-04-06 19:50:12,309 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2022-04-06 19:50:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:12,309 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-04-06 19:50:12,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-04-06 19:50:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 19:50:12,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:12,310 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:12,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-04-06 19:50:12,514 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:12,514 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 139 times [2022-04-06 19:50:12,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:12,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992410964] [2022-04-06 19:50:12,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:12,516 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 140 times [2022-04-06 19:50:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810928424] [2022-04-06 19:50:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:12,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:14,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:14,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:14,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810928424] [2022-04-06 19:50:14,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810928424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:14,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524158389] [2022-04-06 19:50:14,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:14,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:14,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:14,095 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:14,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 19:50:14,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:14,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 19:50:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:19,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524158389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:19,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:19,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-04-06 19:50:19,343 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992410964] [2022-04-06 19:50:19,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992410964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:19,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:19,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 19:50:19,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811860523] [2022-04-06 19:50:19,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:19,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 19:50:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 19:50:19,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-04-06 19:50:19,346 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 19:50:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:29,225 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2022-04-06 19:50:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 19:50:29,226 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 161 [2022-04-06 19:50:29,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:29,228 INFO L225 Difference]: With dead ends: 523 [2022-04-06 19:50:29,228 INFO L226 Difference]: Without dead ends: 506 [2022-04-06 19:50:29,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-04-06 19:50:29,230 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1645 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:29,230 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 37 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:50:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-04-06 19:50:29,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2022-04-06 19:50:29,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 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 19:50:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-04-06 19:50:29,363 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2022-04-06 19:50:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:29,363 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-04-06 19:50:29,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 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 19:50:29,363 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-04-06 19:50:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 19:50:29,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:29,364 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:29,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 19:50:29,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:29,588 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 141 times [2022-04-06 19:50:29,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [204368876] [2022-04-06 19:50:29,590 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:29,590 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 142 times [2022-04-06 19:50:29,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:29,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110365346] [2022-04-06 19:50:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:29,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:31,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:31,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:31,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110365346] [2022-04-06 19:50:31,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110365346] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:31,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214757359] [2022-04-06 19:50:31,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:31,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:31,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:31,252 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:31,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 19:50:31,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:31,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 19:50:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:31,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:36,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214757359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:36,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:36,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-04-06 19:50:36,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [204368876] [2022-04-06 19:50:36,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [204368876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:36,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:36,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 19:50:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566921866] [2022-04-06 19:50:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:36,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 19:50:36,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 19:50:36,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-04-06 19:50:36,712 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:46,867 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2022-04-06 19:50:46,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 19:50:46,868 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 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 163 [2022-04-06 19:50:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:46,869 INFO L225 Difference]: With dead ends: 530 [2022-04-06 19:50:46,869 INFO L226 Difference]: Without dead ends: 513 [2022-04-06 19:50:46,871 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 19:50:46,871 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2006 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:46,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 37 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:50:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-04-06 19:50:47,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2022-04-06 19:50:47,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.031055900621118) internal successors, (166), 161 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:47,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-04-06 19:50:47,007 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2022-04-06 19:50:47,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:47,007 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-04-06 19:50:47,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 73 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-04-06 19:50:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 19:50:47,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:47,008 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:47,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:47,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-04-06 19:50:47,232 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 143 times [2022-04-06 19:50:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [780768403] [2022-04-06 19:50:47,234 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:50:47,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 144 times [2022-04-06 19:50:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819746617] [2022-04-06 19:50:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:48,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:50:48,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819746617] [2022-04-06 19:50:48,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819746617] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436156865] [2022-04-06 19:50:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:48,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:48,905 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:50:48,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 19:50:49,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:50:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:49,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:50:49,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-04-06 19:50:49,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-04-06 19:50:49,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436156865] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:49,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:49,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-04-06 19:50:49,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:49,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [780768403] [2022-04-06 19:50:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [780768403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:49,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:49,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 19:50:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696259338] [2022-04-06 19:50:49,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:49,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 19:50:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 19:50:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 19:50:49,876 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:00,312 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2022-04-06 19:51:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 19:51:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 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 165 [2022-04-06 19:51:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:00,314 INFO L225 Difference]: With dead ends: 537 [2022-04-06 19:51:00,314 INFO L226 Difference]: Without dead ends: 520 [2022-04-06 19:51:00,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 19:51:00,315 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2185 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:00,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 22 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:51:00,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-04-06 19:51:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2022-04-06 19:51:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-04-06 19:51:00,488 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2022-04-06 19:51:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:00,488 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-04-06 19:51:00,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-04-06 19:51:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 19:51:00,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:00,489 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:00,506 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 19:51:00,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:00,689 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 145 times [2022-04-06 19:51:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:00,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035456075] [2022-04-06 19:51:00,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:51:00,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 146 times [2022-04-06 19:51:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954730973] [2022-04-06 19:51:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:02,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954730973] [2022-04-06 19:51:02,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954730973] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15911669] [2022-04-06 19:51:02,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:02,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:02,420 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:02,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 19:51:02,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:02,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 19:51:02,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:03,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15911669] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:08,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-04-06 19:51:08,211 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:08,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035456075] [2022-04-06 19:51:08,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035456075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:08,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:08,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 19:51:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112579123] [2022-04-06 19:51:08,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:08,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 19:51:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 19:51:08,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-04-06 19:51:08,214 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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 19:51:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:19,474 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2022-04-06 19:51:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 19:51:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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 167 [2022-04-06 19:51:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:19,477 INFO L225 Difference]: With dead ends: 544 [2022-04-06 19:51:19,477 INFO L226 Difference]: Without dead ends: 527 [2022-04-06 19:51:19,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 19:51:19,479 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1875 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:19,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 47 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:51:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-04-06 19:51:19,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2022-04-06 19:51:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 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 19:51:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-04-06 19:51:19,625 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2022-04-06 19:51:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:19,625 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-04-06 19:51:19,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 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 19:51:19,625 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-04-06 19:51:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 19:51:19,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:19,626 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:19,651 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 19:51:19,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:19,845 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 147 times [2022-04-06 19:51:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:19,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020969499] [2022-04-06 19:51:19,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:51:19,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:19,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 148 times [2022-04-06 19:51:19,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:19,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894318482] [2022-04-06 19:51:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:21,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894318482] [2022-04-06 19:51:21,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894318482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:21,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480439702] [2022-04-06 19:51:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:51:21,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:21,696 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:21,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 19:51:22,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:51:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 19:51:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:22,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480439702] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:27,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:27,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-04-06 19:51:27,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020969499] [2022-04-06 19:51:27,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020969499] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:27,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:27,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 19:51:27,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137251704] [2022-04-06 19:51:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:27,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 19:51:27,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 19:51:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 19:51:27,692 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:39,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:39,547 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2022-04-06 19:51:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 19:51:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 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 169 [2022-04-06 19:51:39,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:39,548 INFO L225 Difference]: With dead ends: 551 [2022-04-06 19:51:39,548 INFO L226 Difference]: Without dead ends: 534 [2022-04-06 19:51:39,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 19:51:39,550 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1850 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:39,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 42 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:51:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-04-06 19:51:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2022-04-06 19:51:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.029940119760479) internal successors, (172), 167 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-04-06 19:51:39,702 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2022-04-06 19:51:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:39,702 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-04-06 19:51:39,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.064935064935065) internal successors, (159), 76 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-04-06 19:51:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 19:51:39,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:39,703 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:39,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 19:51:39,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-04-06 19:51:39,903 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 149 times [2022-04-06 19:51:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:39,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542942835] [2022-04-06 19:51:39,905 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:51:39,905 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 150 times [2022-04-06 19:51:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:39,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450027404] [2022-04-06 19:51:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:41,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:41,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450027404] [2022-04-06 19:51:41,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450027404] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755685696] [2022-04-06 19:51:41,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:41,726 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:41,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 19:51:42,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:51:42,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:51:42,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-04-06 19:51:42,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-04-06 19:51:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755685696] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:42,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:42,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-04-06 19:51:42,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542942835] [2022-04-06 19:51:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542942835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:42,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:42,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 19:51:42,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914888675] [2022-04-06 19:51:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:42,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 19:51:42,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:42,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 19:51:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 19:51:42,760 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:54,732 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-04-06 19:51:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 19:51:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 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 171 [2022-04-06 19:51:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:54,734 INFO L225 Difference]: With dead ends: 558 [2022-04-06 19:51:54,734 INFO L226 Difference]: Without dead ends: 541 [2022-04-06 19:51:54,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 19:51:54,735 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2334 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:54,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 42 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:51:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-04-06 19:51:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2022-04-06 19:51:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.029585798816568) internal successors, (174), 169 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-04-06 19:51:54,896 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2022-04-06 19:51:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:54,896 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-04-06 19:51:54,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:54,896 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-04-06 19:51:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 19:51:54,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:54,905 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:54,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:55,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 19:51:55,130 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 151 times [2022-04-06 19:51:55,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:55,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430644744] [2022-04-06 19:51:55,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:51:55,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:55,131 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 152 times [2022-04-06 19:51:55,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:55,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070279034] [2022-04-06 19:51:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:55,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:57,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:57,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:57,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070279034] [2022-04-06 19:51:57,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070279034] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:57,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533615115] [2022-04-06 19:51:57,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:57,005 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:51:57,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 19:51:57,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:57,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:57,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 19:51:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:51:57,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:03,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533615115] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:03,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:03,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-04-06 19:52:03,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430644744] [2022-04-06 19:52:03,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430644744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:03,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:03,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 19:52:03,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026972266] [2022-04-06 19:52:03,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:03,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 19:52:03,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 19:52:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-04-06 19:52:03,340 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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 19:52:16,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:16,624 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2022-04-06 19:52:16,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 19:52:16,624 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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 173 [2022-04-06 19:52:16,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:16,626 INFO L225 Difference]: With dead ends: 565 [2022-04-06 19:52:16,626 INFO L226 Difference]: Without dead ends: 548 [2022-04-06 19:52:16,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-04-06 19:52:16,628 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2252 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:16,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 47 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:52:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-04-06 19:52:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2022-04-06 19:52:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 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 19:52:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-04-06 19:52:16,807 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2022-04-06 19:52:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:16,807 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-04-06 19:52:16,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 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 19:52:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-04-06 19:52:16,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 19:52:16,808 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:16,808 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:16,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:17,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:17,031 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:17,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:17,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 153 times [2022-04-06 19:52:17,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:17,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [465166582] [2022-04-06 19:52:17,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:52:17,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:17,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 154 times [2022-04-06 19:52:17,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:17,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460473798] [2022-04-06 19:52:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:17,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:19,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:19,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460473798] [2022-04-06 19:52:19,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460473798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:19,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140500601] [2022-04-06 19:52:19,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:52:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:19,090 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:19,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 19:52:19,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:52:19,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 19:52:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:19,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:25,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140500601] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:25,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:25,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-04-06 19:52:25,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:25,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [465166582] [2022-04-06 19:52:25,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [465166582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:25,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:25,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 19:52:25,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429603579] [2022-04-06 19:52:25,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:25,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 19:52:25,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:25,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 19:52:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 19:52:25,588 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:39,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:39,122 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2022-04-06 19:52:39,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 19:52:39,122 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 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 175 [2022-04-06 19:52:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:39,124 INFO L225 Difference]: With dead ends: 572 [2022-04-06 19:52:39,124 INFO L226 Difference]: Without dead ends: 555 [2022-04-06 19:52:39,127 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 19:52:39,127 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:39,128 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 32 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:52:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-04-06 19:52:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2022-04-06 19:52:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 173 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-04-06 19:52:39,334 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2022-04-06 19:52:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:39,335 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-04-06 19:52:39,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0625) internal successors, (165), 79 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-04-06 19:52:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 19:52:39,335 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:39,335 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:39,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-04-06 19:52:39,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:39,536 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:39,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 155 times [2022-04-06 19:52:39,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:39,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1833167576] [2022-04-06 19:52:39,537 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:52:39,537 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:39,537 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 156 times [2022-04-06 19:52:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:39,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071033220] [2022-04-06 19:52:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:39,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:41,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:41,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:41,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071033220] [2022-04-06 19:52:41,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071033220] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:41,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100555413] [2022-04-06 19:52:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:52:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:41,508 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:41,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 19:52:42,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:52:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:52:42,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-04-06 19:52:42,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-04-06 19:52:42,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100555413] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:42,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:42,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-04-06 19:52:42,594 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:42,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1833167576] [2022-04-06 19:52:42,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1833167576] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:42,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:42,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 19:52:42,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787065896] [2022-04-06 19:52:42,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:42,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 19:52:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 19:52:42,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 19:52:42,597 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:56,432 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2022-04-06 19:52:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 19:52:56,433 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 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 177 [2022-04-06 19:52:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:56,434 INFO L225 Difference]: With dead ends: 579 [2022-04-06 19:52:56,434 INFO L226 Difference]: Without dead ends: 562 [2022-04-06 19:52:56,435 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 19:52:56,436 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:56,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2201 Valid, 42 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 19:52:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-04-06 19:52:56,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2022-04-06 19:52:56,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-04-06 19:52:56,610 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2022-04-06 19:52:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:56,610 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-04-06 19:52:56,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-04-06 19:52:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 19:52:56,610 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:56,611 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:56,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 19:52:56,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:56,811 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 157 times [2022-04-06 19:52:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636724948] [2022-04-06 19:52:56,813 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:52:56,813 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 158 times [2022-04-06 19:52:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:56,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644864826] [2022-04-06 19:52:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:58,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644864826] [2022-04-06 19:52:58,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644864826] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:58,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835792381] [2022-04-06 19:52:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:52:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:58,797 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:52:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 19:52:59,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:52:59,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 19:52:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:52:59,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:53:05,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835792381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:05,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:05,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-04-06 19:53:05,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:05,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636724948] [2022-04-06 19:53:05,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636724948] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:05,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:05,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 19:53:05,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394348637] [2022-04-06 19:53:05,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:05,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 19:53:05,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 19:53:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 19:53:05,449 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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 19:53:20,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:20,135 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2022-04-06 19:53:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 19:53:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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 179 [2022-04-06 19:53:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:20,137 INFO L225 Difference]: With dead ends: 586 [2022-04-06 19:53:20,137 INFO L226 Difference]: Without dead ends: 569 [2022-04-06 19:53:20,139 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-04-06 19:53:20,139 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1828 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:20,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 52 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:53:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-04-06 19:53:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2022-04-06 19:53:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 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 19:53:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-04-06 19:53:20,316 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2022-04-06 19:53:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:20,317 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-04-06 19:53:20,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 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 19:53:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-04-06 19:53:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 19:53:20,317 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:20,317 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:20,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 19:53:20,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:20,518 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:20,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 159 times [2022-04-06 19:53:20,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:20,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1163767874] [2022-04-06 19:53:20,520 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:53:20,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:20,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 160 times [2022-04-06 19:53:20,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:20,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256159624] [2022-04-06 19:53:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:20,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:22,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:53:22,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256159624] [2022-04-06 19:53:22,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256159624] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:22,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671142885] [2022-04-06 19:53:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:53:22,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:22,571 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:53:22,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 19:53:23,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:53:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:23,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 19:53:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:53:23,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:53:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671142885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:29,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:29,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-04-06 19:53:29,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:29,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1163767874] [2022-04-06 19:53:29,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1163767874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:29,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:29,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 19:53:29,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466476267] [2022-04-06 19:53:29,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:29,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 19:53:29,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:29,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 19:53:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 19:53:29,341 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:44,532 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-04-06 19:53:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 19:53:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 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 181 [2022-04-06 19:53:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:44,534 INFO L225 Difference]: With dead ends: 593 [2022-04-06 19:53:44,534 INFO L226 Difference]: Without dead ends: 576 [2022-04-06 19:53:44,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-04-06 19:53:44,536 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:44,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 32 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:53:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-04-06 19:53:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2022-04-06 19:53:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-04-06 19:53:44,720 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2022-04-06 19:53:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:44,721 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-04-06 19:53:44,721 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 82 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-04-06 19:53:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 19:53:44,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:44,722 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:44,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 19:53:44,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:44,937 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:44,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:44,937 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 161 times [2022-04-06 19:53:44,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:44,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274867930] [2022-04-06 19:53:44,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:53:44,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:44,938 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 162 times [2022-04-06 19:53:44,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:44,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791853819] [2022-04-06 19:53:44,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:44,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:47,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:53:47,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791853819] [2022-04-06 19:53:47,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791853819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:47,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024078138] [2022-04-06 19:53:47,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:53:47,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:47,036 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:53:47,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 19:53:47,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:53:47,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:53:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-04-06 19:53:47,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-04-06 19:53:48,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024078138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:48,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:48,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-04-06 19:53:48,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274867930] [2022-04-06 19:53:48,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274867930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:48,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:48,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 19:53:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695871268] [2022-04-06 19:53:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:48,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 19:53:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 19:53:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 19:53:48,193 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:03,320 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2022-04-06 19:54:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 19:54:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 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 183 [2022-04-06 19:54:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:03,322 INFO L225 Difference]: With dead ends: 600 [2022-04-06 19:54:03,322 INFO L226 Difference]: Without dead ends: 583 [2022-04-06 19:54:03,323 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 19:54:03,323 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2066 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:03,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 57 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:54:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-04-06 19:54:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-04-06 19:54:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 181 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-04-06 19:54:03,506 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2022-04-06 19:54:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:03,507 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-04-06 19:54:03,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-04-06 19:54:03,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 19:54:03,507 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:03,508 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:03,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 19:54:03,708 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-04-06 19:54:03,709 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 163 times [2022-04-06 19:54:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805633256] [2022-04-06 19:54:03,710 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:54:03,710 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 164 times [2022-04-06 19:54:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:03,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073953041] [2022-04-06 19:54:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:03,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:05,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073953041] [2022-04-06 19:54:05,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073953041] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892911771] [2022-04-06 19:54:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:54:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:05,860 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:05,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 19:54:06,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:54:06,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:06,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:54:06,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:06,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:12,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892911771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:12,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:12,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-04-06 19:54:12,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805633256] [2022-04-06 19:54:12,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805633256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:12,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:12,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 19:54:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124501965] [2022-04-06 19:54:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:12,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 19:54:12,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 19:54:12,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-04-06 19:54:12,945 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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 19:54:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:29,151 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2022-04-06 19:54:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 19:54:29,151 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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 185 [2022-04-06 19:54:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:29,153 INFO L225 Difference]: With dead ends: 607 [2022-04-06 19:54:29,153 INFO L226 Difference]: Without dead ends: 590 [2022-04-06 19:54:29,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-04-06 19:54:29,155 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1958 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 529 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:29,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 42 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [529 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:54:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-04-06 19:54:29,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2022-04-06 19:54:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 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 19:54:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-04-06 19:54:29,347 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2022-04-06 19:54:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:29,348 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-04-06 19:54:29,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 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 19:54:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-04-06 19:54:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 19:54:29,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:29,349 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:29,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 19:54:29,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:29,549 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:29,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 165 times [2022-04-06 19:54:29,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580950181] [2022-04-06 19:54:29,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:54:29,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 166 times [2022-04-06 19:54:29,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:29,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560749975] [2022-04-06 19:54:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:29,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560749975] [2022-04-06 19:54:31,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560749975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:31,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921209211] [2022-04-06 19:54:31,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:54:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:31,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:31,744 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:31,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 19:54:32,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:54:32,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 84 conjunts are in the unsatisfiable core [2022-04-06 19:54:32,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:32,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:39,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921209211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:39,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:39,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-04-06 19:54:39,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580950181] [2022-04-06 19:54:39,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580950181] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:39,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:39,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 19:54:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843552858] [2022-04-06 19:54:39,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:39,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 19:54:39,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 19:54:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 19:54:39,033 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:55,622 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2022-04-06 19:54:55,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 19:54:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 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 187 [2022-04-06 19:54:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:55,624 INFO L225 Difference]: With dead ends: 614 [2022-04-06 19:54:55,624 INFO L226 Difference]: Without dead ends: 597 [2022-04-06 19:54:55,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-04-06 19:54:55,628 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 573 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2192 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 573 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:55,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2192 Valid, 42 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [573 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:54:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-04-06 19:54:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2022-04-06 19:54:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-04-06 19:54:55,853 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2022-04-06 19:54:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:55,853 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-04-06 19:54:55,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.058139534883721) internal successors, (177), 85 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-04-06 19:54:55,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 19:54:55,854 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:55,854 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:55,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 19:54:56,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:56,080 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:56,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 167 times [2022-04-06 19:54:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:56,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820372657] [2022-04-06 19:54:56,081 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:54:56,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 168 times [2022-04-06 19:54:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:56,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865066583] [2022-04-06 19:54:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:58,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:54:58,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865066583] [2022-04-06 19:54:58,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865066583] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:58,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582266902] [2022-04-06 19:54:58,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:54:58,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:58,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:58,360 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:54:58,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 19:54:58,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:54:58,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:58,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:54:58,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-04-06 19:54:59,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-04-06 19:54:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582266902] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:59,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:59,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-04-06 19:54:59,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820372657] [2022-04-06 19:54:59,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820372657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:59,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:59,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 19:54:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186382670] [2022-04-06 19:54:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:59,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 19:54:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:59,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 19:54:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 19:54:59,552 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:16,094 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2022-04-06 19:55:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 19:55:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 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 189 [2022-04-06 19:55:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:16,096 INFO L225 Difference]: With dead ends: 621 [2022-04-06 19:55:16,096 INFO L226 Difference]: Without dead ends: 604 [2022-04-06 19:55:16,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 19:55:16,097 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2163 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:16,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 42 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:55:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-04-06 19:55:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2022-04-06 19:55:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 187 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-04-06 19:55:16,296 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2022-04-06 19:55:16,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:16,296 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-04-06 19:55:16,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-04-06 19:55:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 19:55:16,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:16,297 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:16,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 19:55:16,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:16,497 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:16,498 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 169 times [2022-04-06 19:55:16,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:16,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139586591] [2022-04-06 19:55:16,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:55:16,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 170 times [2022-04-06 19:55:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416217754] [2022-04-06 19:55:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:16,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:18,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:18,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416217754] [2022-04-06 19:55:18,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416217754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:18,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814449186] [2022-04-06 19:55:18,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:55:18,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:18,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:18,757 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:55:18,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 19:55:19,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:55:19,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 19:55:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:19,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:26,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814449186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:26,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:26,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-04-06 19:55:26,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139586591] [2022-04-06 19:55:26,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139586591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:26,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:26,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 19:55:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233120880] [2022-04-06 19:55:26,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:26,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 19:55:26,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 19:55:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-04-06 19:55:26,332 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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 19:55:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:44,179 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2022-04-06 19:55:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 19:55:44,180 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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 191 [2022-04-06 19:55:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:44,182 INFO L225 Difference]: With dead ends: 628 [2022-04-06 19:55:44,182 INFO L226 Difference]: Without dead ends: 611 [2022-04-06 19:55:44,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-04-06 19:55:44,185 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1974 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:44,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1974 Valid, 57 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:55:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-04-06 19:55:44,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2022-04-06 19:55:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 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 19:55:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-04-06 19:55:44,390 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2022-04-06 19:55:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:44,390 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-04-06 19:55:44,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 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 19:55:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-04-06 19:55:44,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 19:55:44,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:44,391 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:44,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 19:55:44,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:44,592 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:44,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:44,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 171 times [2022-04-06 19:55:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:44,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185006059] [2022-04-06 19:55:44,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:55:44,593 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 172 times [2022-04-06 19:55:44,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:44,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781558860] [2022-04-06 19:55:44,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:44,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:44,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:46,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781558860] [2022-04-06 19:55:46,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781558860] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665520489] [2022-04-06 19:55:46,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:55:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:46,856 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:55:46,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 19:55:47,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:55:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:47,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 19:55:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:47,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:55:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665520489] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:54,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:54,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-04-06 19:55:54,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185006059] [2022-04-06 19:55:54,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185006059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:54,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:54,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 19:55:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463861944] [2022-04-06 19:55:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:54,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 19:55:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 19:55:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 19:55:54,482 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:12,927 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2022-04-06 19:56:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 19:56:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 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 193 [2022-04-06 19:56:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:12,929 INFO L225 Difference]: With dead ends: 635 [2022-04-06 19:56:12,929 INFO L226 Difference]: Without dead ends: 618 [2022-04-06 19:56:12,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 19:56:12,932 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2127 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:12,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 47 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:56:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-04-06 19:56:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2022-04-06 19:56:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-04-06 19:56:13,155 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2022-04-06 19:56:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:13,155 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-04-06 19:56:13,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.056179775280899) internal successors, (183), 88 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-04-06 19:56:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 19:56:13,156 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:13,156 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:13,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:13,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:13,357 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 173 times [2022-04-06 19:56:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [897025254] [2022-04-06 19:56:13,358 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:56:13,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 174 times [2022-04-06 19:56:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:13,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866105924] [2022-04-06 19:56:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:15,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:56:15,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866105924] [2022-04-06 19:56:15,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866105924] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:15,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448613943] [2022-04-06 19:56:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:56:15,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:15,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:15,748 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:15,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 19:56:16,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 19:56:16,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:16,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:56:16,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-04-06 19:56:16,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-04-06 19:56:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448613943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:17,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:17,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-04-06 19:56:17,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:17,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [897025254] [2022-04-06 19:56:17,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [897025254] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:17,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:17,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 19:56:17,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875000385] [2022-04-06 19:56:17,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:17,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 19:56:17,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 19:56:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 19:56:17,021 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:35,723 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2022-04-06 19:56:35,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 19:56:35,723 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 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 195 [2022-04-06 19:56:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:35,725 INFO L225 Difference]: With dead ends: 642 [2022-04-06 19:56:35,725 INFO L226 Difference]: Without dead ends: 625 [2022-04-06 19:56:35,727 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 19:56:35,727 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2203 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:35,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 37 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:56:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-04-06 19:56:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2022-04-06 19:56:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0259067357512954) internal successors, (198), 193 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-04-06 19:56:35,949 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2022-04-06 19:56:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:35,949 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-04-06 19:56:35,949 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-04-06 19:56:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 19:56:35,950 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:35,950 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:35,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 19:56:36,150 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 19:56:36,150 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:36,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 175 times [2022-04-06 19:56:36,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:36,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009165940] [2022-04-06 19:56:36,152 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-06 19:56:36,152 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 176 times [2022-04-06 19:56:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:36,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225404344] [2022-04-06 19:56:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:36,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:38,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:56:38,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225404344] [2022-04-06 19:56:38,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225404344] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450551444] [2022-04-06 19:56:38,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:56:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:38,571 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 19:56:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 19:56:39,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:56:39,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 19:56:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:56:39,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 19:56:46,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450551444] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:46,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:46,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-04-06 19:56:46,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009165940] [2022-04-06 19:56:46,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009165940] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:46,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:46,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 19:56:46,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337094470] [2022-04-06 19:56:46,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:46,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 19:56:46,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:46,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 19:56:46,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-04-06 19:56:46,648 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 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)