/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 12:59:07,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 12:59:07,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 12:59:07,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 12:59:07,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 12:59:07,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 12:59:07,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 12:59:07,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 12:59:07,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 12:59:07,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 12:59:07,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 12:59:07,062 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 12:59:07,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 12:59:07,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 12:59:07,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 12:59:07,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 12:59:07,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:59:07,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 12:59:07,064 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 12:59:07,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 12:59:07,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 12:59:07,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 12:59:07,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 12:59:07,246 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 12:59:07,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 12:59:07,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129e00e6c/16d0eca24a624fb9a308c0574050b186/FLAGea64318a1 [2022-03-20 12:59:07,649 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 12:59:07,650 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_3-2.i [2022-03-20 12:59:07,653 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129e00e6c/16d0eca24a624fb9a308c0574050b186/FLAGea64318a1 [2022-03-20 12:59:07,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/129e00e6c/16d0eca24a624fb9a308c0574050b186 [2022-03-20 12:59:07,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 12:59:07,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 12:59:07,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 12:59:07,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 12:59:07,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 12:59:07,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26226d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07, skipping insertion in model container [2022-03-20 12:59:07,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 12:59:07,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 12:59:07,783 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] [2022-03-20 12:59:07,791 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:59:07,794 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 12:59:07,803 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] [2022-03-20 12:59:07,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 12:59:07,812 INFO L208 MainTranslator]: Completed translation [2022-03-20 12:59:07,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07 WrapperNode [2022-03-20 12:59:07,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 12:59:07,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 12:59:07,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 12:59:07,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 12:59:07,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 12:59:07,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 12:59:07,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 12:59:07,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 12:59:07,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (1/1) ... [2022-03-20 12:59:07,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 12:59:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:07,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 12:59:07,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 12:59:07,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 12:59:07,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 12:59:07,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 12:59:07,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 12:59:07,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 12:59:07,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 12:59:07,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 12:59:07,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 12:59:07,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 12:59:07,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 12:59:07,950 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 12:59:07,951 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 12:59:08,021 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 12:59:08,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 12:59:08,025 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 12:59:08,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:59:08 BoogieIcfgContainer [2022-03-20 12:59:08,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 12:59:08,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 12:59:08,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 12:59:08,033 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 12:59:08,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:59:07" (1/3) ... [2022-03-20 12:59:08,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b569d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:59:08, skipping insertion in model container [2022-03-20 12:59:08,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:59:07" (2/3) ... [2022-03-20 12:59:08,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b569d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:59:08, skipping insertion in model container [2022-03-20 12:59:08,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:59:08" (3/3) ... [2022-03-20 12:59:08,034 INFO L111 eAbstractionObserver]: Analyzing ICFG array_3-2.i [2022-03-20 12:59:08,037 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 12:59:08,037 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 12:59:08,072 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 12:59:08,081 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 12:59:08,081 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 12:59:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 12:59:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 12:59:08,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:08,098 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:08,098 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 1 times [2022-03-20 12:59:08,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [304335440] [2022-03-20 12:59:08,115 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:59:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1368365270, now seen corresponding path program 2 times [2022-03-20 12:59:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:08,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197412598] [2022-03-20 12:59:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:08,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:08,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197412598] [2022-03-20 12:59:08,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197412598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:08,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:59:08,228 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:08,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [304335440] [2022-03-20 12:59:08,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [304335440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:08,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 12:59:08,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975921397] [2022-03-20 12:59:08,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:08,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 12:59:08,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 12:59:08,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 12:59:08,251 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) [2022-03-20 12:59:08,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:08,281 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-03-20 12:59:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 12:59:08,283 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 [2022-03-20 12:59:08,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:08,287 INFO L225 Difference]: With dead ends: 42 [2022-03-20 12:59:08,287 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 12:59:08,288 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 [2022-03-20 12:59:08,290 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 [2022-03-20 12:59:08,291 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] [2022-03-20 12:59:08,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 12:59:08,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 12:59:08,310 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) [2022-03-20 12:59:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-20 12:59:08,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-03-20 12:59:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:08,311 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-20 12:59:08,312 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) [2022-03-20 12:59:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-20 12:59:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 12:59:08,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:08,312 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:08,312 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 12:59:08,313 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:08,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 1 times [2022-03-20 12:59:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854788549] [2022-03-20 12:59:08,314 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 12:59:08,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1606867655, now seen corresponding path program 2 times [2022-03-20 12:59:08,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:08,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436173593] [2022-03-20 12:59:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:08,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:08,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436173593] [2022-03-20 12:59:08,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436173593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:08,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:59:08,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:08,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854788549] [2022-03-20 12:59:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854788549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 12:59:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859496217] [2022-03-20 12:59:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:08,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 12:59:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 12:59:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 12:59:08,360 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) [2022-03-20 12:59:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:08,408 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 12:59:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 12:59:08,408 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 [2022-03-20 12:59:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:08,410 INFO L225 Difference]: With dead ends: 35 [2022-03-20 12:59:08,410 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 12:59:08,414 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 [2022-03-20 12:59:08,415 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 [2022-03-20 12:59:08,415 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] [2022-03-20 12:59:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 12:59:08,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-03-20 12:59:08,420 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) [2022-03-20 12:59:08,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-20 12:59:08,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2022-03-20 12:59:08,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:08,421 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-20 12:59:08,421 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) [2022-03-20 12:59:08,421 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-20 12:59:08,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 12:59:08,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:08,421 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:08,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 12:59:08,422 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:08,422 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 1 times [2022-03-20 12:59:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1207428663] [2022-03-20 12:59:08,435 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:08,435 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:08,436 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 41653477, now seen corresponding path program 2 times [2022-03-20 12:59:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:08,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510343820] [2022-03-20 12:59:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:08,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 12:59:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510343820] [2022-03-20 12:59:08,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510343820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:08,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523855840] [2022-03-20 12:59:08,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:08,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:08,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:08,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:08,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 12:59:08,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 12:59:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:59:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 12:59:08,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 12:59:08,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523855840] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 12:59:08,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-03-20 12:59:08,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1207428663] [2022-03-20 12:59:08,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1207428663] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:08,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:08,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:59:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933908977] [2022-03-20 12:59:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:08,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:59:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:59:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:59:08,662 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) [2022-03-20 12:59:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:08,687 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-20 12:59:08,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:59:08,687 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 [2022-03-20 12:59:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:08,688 INFO L225 Difference]: With dead ends: 29 [2022-03-20 12:59:08,688 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 12:59:08,688 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 [2022-03-20 12:59:08,689 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:08,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:08,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 12:59:08,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-03-20 12:59:08,693 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) [2022-03-20 12:59:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-20 12:59:08,694 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-03-20 12:59:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:08,694 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-20 12:59:08,694 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) [2022-03-20 12:59:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-20 12:59:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 12:59:08,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:08,695 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:08,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 12:59:08,911 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 [2022-03-20 12:59:08,912 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:08,912 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 1 times [2022-03-20 12:59:08,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:08,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1851347173] [2022-03-20 12:59:08,914 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:08,914 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:08,915 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash -62255392, now seen corresponding path program 2 times [2022-03-20 12:59:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:08,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221093530] [2022-03-20 12:59:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:59:08,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221093530] [2022-03-20 12:59:08,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221093530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815609200] [2022-03-20 12:59:08,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:08,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:08,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:08,978 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:08,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 12:59:09,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:09,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 12:59:09,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:59:09,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:59:09,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815609200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:09,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:09,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 12:59:09,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:09,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1851347173] [2022-03-20 12:59:09,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1851347173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:09,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:09,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 12:59:09,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878579257] [2022-03-20 12:59:09,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:09,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 12:59:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 12:59:09,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 12:59:09,122 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) [2022-03-20 12:59:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:09,193 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-03-20 12:59:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 12:59:09,193 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 [2022-03-20 12:59:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:09,195 INFO L225 Difference]: With dead ends: 44 [2022-03-20 12:59:09,195 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 12:59:09,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 12:59:09,204 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 [2022-03-20 12:59:09,204 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] [2022-03-20 12:59:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 12:59:09,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-20 12:59:09,208 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) [2022-03-20 12:59:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 12:59:09,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2022-03-20 12:59:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:09,209 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 12:59:09,209 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) [2022-03-20 12:59:09,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 12:59:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 12:59:09,209 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:09,210 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:09,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:09,419 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 [2022-03-20 12:59:09,419 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 3 times [2022-03-20 12:59:09,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:09,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843594648] [2022-03-20 12:59:09,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:09,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:09,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:09,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1107704446, now seen corresponding path program 4 times [2022-03-20 12:59:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:09,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795556650] [2022-03-20 12:59:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:09,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795556650] [2022-03-20 12:59:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795556650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137333883] [2022-03-20 12:59:09,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:09,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:09,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 12:59:09,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:09,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 12:59:09,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:59:09,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 12:59:09,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137333883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:09,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:09,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-03-20 12:59:09,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:09,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843594648] [2022-03-20 12:59:09,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843594648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:09,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:09,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:59:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032262824] [2022-03-20 12:59:09,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:09,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:59:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:59:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:59:09,647 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) [2022-03-20 12:59:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:09,718 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-03-20 12:59:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:59:09,718 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 [2022-03-20 12:59:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:09,719 INFO L225 Difference]: With dead ends: 35 [2022-03-20 12:59:09,719 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 12:59:09,719 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 [2022-03-20 12:59:09,721 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 [2022-03-20 12:59:09,721 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] [2022-03-20 12:59:09,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 12:59:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-03-20 12:59:09,738 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) [2022-03-20 12:59:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-03-20 12:59:09,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2022-03-20 12:59:09,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:09,740 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-03-20 12:59:09,740 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) [2022-03-20 12:59:09,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-03-20 12:59:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 12:59:09,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:09,741 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:09,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:09,957 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 [2022-03-20 12:59:09,958 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:09,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 5 times [2022-03-20 12:59:09,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:09,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [768360462] [2022-03-20 12:59:09,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:09,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:09,960 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2073673735, now seen corresponding path program 6 times [2022-03-20 12:59:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577304802] [2022-03-20 12:59:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:09,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:10,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:10,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:10,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577304802] [2022-03-20 12:59:10,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577304802] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:10,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267373359] [2022-03-20 12:59:10,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:10,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:10,038 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:10,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 12:59:10,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-20 12:59:10,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:10,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 12:59:10,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267373359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:10,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:10,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-03-20 12:59:10,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:10,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [768360462] [2022-03-20 12:59:10,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [768360462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:10,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:10,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 12:59:10,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379355560] [2022-03-20 12:59:10,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:10,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 12:59:10,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:10,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 12:59:10,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:59:10,205 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) [2022-03-20 12:59:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:10,260 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-03-20 12:59:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 12:59:10,261 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 [2022-03-20 12:59:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:10,262 INFO L225 Difference]: With dead ends: 54 [2022-03-20 12:59:10,263 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 12:59:10,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:59:10,265 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:10,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 12:59:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-03-20 12:59:10,269 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) [2022-03-20 12:59:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-20 12:59:10,270 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2022-03-20 12:59:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:10,270 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-20 12:59:10,270 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) [2022-03-20 12:59:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-20 12:59:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 12:59:10,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:10,271 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:10,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:10,483 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 [2022-03-20 12:59:10,483 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:10,484 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 7 times [2022-03-20 12:59:10,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:10,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182033962] [2022-03-20 12:59:10,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:10,486 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:10,486 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:10,486 INFO L85 PathProgramCache]: Analyzing trace with hash -550585065, now seen corresponding path program 8 times [2022-03-20 12:59:10,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:10,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529392977] [2022-03-20 12:59:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:10,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:10,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529392977] [2022-03-20 12:59:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529392977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:10,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542775155] [2022-03-20 12:59:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:10,576 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:10,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 12:59:10,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:10,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 12:59:10,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:10,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542775155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:10,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:10,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-20 12:59:10,716 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:10,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182033962] [2022-03-20 12:59:10,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182033962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:10,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:10,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 12:59:10,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721159400] [2022-03-20 12:59:10,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:10,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 12:59:10,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:10,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 12:59:10,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-03-20 12:59:10,718 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) [2022-03-20 12:59:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:10,791 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-03-20 12:59:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 12:59:10,791 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 [2022-03-20 12:59:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:10,793 INFO L225 Difference]: With dead ends: 61 [2022-03-20 12:59:10,793 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 12:59:10,793 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 [2022-03-20 12:59:10,794 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:10,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 27 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 12:59:10,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-03-20 12:59:10,802 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) [2022-03-20 12:59:10,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-20 12:59:10,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 29 [2022-03-20 12:59:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:10,803 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-20 12:59:10,804 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) [2022-03-20 12:59:10,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-20 12:59:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 12:59:10,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:10,804 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:10,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:11,021 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 [2022-03-20 12:59:11,021 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:11,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:11,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 9 times [2022-03-20 12:59:11,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:11,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1993990184] [2022-03-20 12:59:11,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:11,023 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:11,023 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1446221131, now seen corresponding path program 10 times [2022-03-20 12:59:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:11,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890857312] [2022-03-20 12:59:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:11,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:11,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890857312] [2022-03-20 12:59:11,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890857312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:11,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934180537] [2022-03-20 12:59:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:11,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:11,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:11,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 12:59:11,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:11,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:11,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:11,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934180537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:11,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-03-20 12:59:11,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:11,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1993990184] [2022-03-20 12:59:11,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1993990184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:11,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:11,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 12:59:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864879677] [2022-03-20 12:59:11,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:11,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 12:59:11,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:11,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 12:59:11,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-03-20 12:59:11,215 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) [2022-03-20 12:59:11,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:11,291 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-03-20 12:59:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 12:59:11,292 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 [2022-03-20 12:59:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:11,292 INFO L225 Difference]: With dead ends: 68 [2022-03-20 12:59:11,292 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 12:59:11,293 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 [2022-03-20 12:59:11,293 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:11,293 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 32 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 12:59:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 12:59:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-03-20 12:59:11,298 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) [2022-03-20 12:59:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-20 12:59:11,298 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 31 [2022-03-20 12:59:11,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:11,298 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-20 12:59:11,298 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) [2022-03-20 12:59:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-20 12:59:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 12:59:11,299 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:11,299 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:11,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:11,515 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 [2022-03-20 12:59:11,516 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 11 times [2022-03-20 12:59:11,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:11,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2099334676] [2022-03-20 12:59:11,517 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:11,517 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:11,518 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1135945939, now seen corresponding path program 12 times [2022-03-20 12:59:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:11,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305217098] [2022-03-20 12:59:11,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:11,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:11,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:11,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305217098] [2022-03-20 12:59:11,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305217098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:11,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822463190] [2022-03-20 12:59:11,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:11,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:11,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:11,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:11,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 12:59:11,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:11,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:11,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:59:11,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 12:59:11,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822463190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:11,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:11,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2022-03-20 12:59:11,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2099334676] [2022-03-20 12:59:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2099334676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:11,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:11,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 12:59:11,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457115795] [2022-03-20 12:59:11,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:11,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 12:59:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 12:59:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-20 12:59:11,743 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) [2022-03-20 12:59:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:11,855 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-03-20 12:59:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 12:59:11,855 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 [2022-03-20 12:59:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:11,856 INFO L225 Difference]: With dead ends: 75 [2022-03-20 12:59:11,856 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 12:59:11,856 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 [2022-03-20 12:59:11,857 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 [2022-03-20 12:59:11,857 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] [2022-03-20 12:59:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 12:59:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2022-03-20 12:59:11,861 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) [2022-03-20 12:59:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-03-20 12:59:11,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 33 [2022-03-20 12:59:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:11,862 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-03-20 12:59:11,862 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) [2022-03-20 12:59:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-03-20 12:59:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 12:59:11,862 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:11,863 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:11,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:12,079 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 [2022-03-20 12:59:12,079 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 13 times [2022-03-20 12:59:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:12,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623214181] [2022-03-20 12:59:12,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:12,081 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:12,081 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash 107403121, now seen corresponding path program 14 times [2022-03-20 12:59:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:12,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156723442] [2022-03-20 12:59:12,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:12,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156723442] [2022-03-20 12:59:12,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156723442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032339035] [2022-03-20 12:59:12,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:12,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:12,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:12,137 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:12,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 12:59:12,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:12,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:12,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 12:59:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032339035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:12,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:12,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 12:59:12,329 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623214181] [2022-03-20 12:59:12,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623214181] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:12,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:12,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 12:59:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356245939] [2022-03-20 12:59:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:12,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 12:59:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 12:59:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:59:12,330 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) [2022-03-20 12:59:12,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:12,447 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2022-03-20 12:59:12,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 12:59:12,447 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 [2022-03-20 12:59:12,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:12,448 INFO L225 Difference]: With dead ends: 82 [2022-03-20 12:59:12,448 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 12:59:12,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2022-03-20 12:59:12,449 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 [2022-03-20 12:59:12,449 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] [2022-03-20 12:59:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 12:59:12,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2022-03-20 12:59:12,453 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) [2022-03-20 12:59:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-20 12:59:12,454 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 35 [2022-03-20 12:59:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:12,454 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-20 12:59:12,454 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) [2022-03-20 12:59:12,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-20 12:59:12,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 12:59:12,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:12,454 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:12,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:12,659 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 [2022-03-20 12:59:12,660 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 15 times [2022-03-20 12:59:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:12,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542230048] [2022-03-20 12:59:12,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:12,661 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:12,661 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -479766897, now seen corresponding path program 16 times [2022-03-20 12:59:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:12,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390261593] [2022-03-20 12:59:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:12,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:12,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390261593] [2022-03-20 12:59:12,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390261593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:12,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189614121] [2022-03-20 12:59:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:12,720 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:12,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 12:59:12,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:12,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 12:59:12,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189614121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:12,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:12,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-03-20 12:59:12,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:12,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542230048] [2022-03-20 12:59:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542230048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:12,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:12,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 12:59:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938439442] [2022-03-20 12:59:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:12,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 12:59:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 12:59:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-03-20 12:59:12,971 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) [2022-03-20 12:59:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:13,109 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-03-20 12:59:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 12:59:13,109 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 [2022-03-20 12:59:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:13,111 INFO L225 Difference]: With dead ends: 89 [2022-03-20 12:59:13,111 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 12:59:13,111 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 [2022-03-20 12:59:13,112 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 [2022-03-20 12:59:13,112 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] [2022-03-20 12:59:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 12:59:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2022-03-20 12:59:13,119 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) [2022-03-20 12:59:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-03-20 12:59:13,119 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2022-03-20 12:59:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:13,119 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-03-20 12:59:13,120 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) [2022-03-20 12:59:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-03-20 12:59:13,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 12:59:13,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:13,120 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:13,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:13,331 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 [2022-03-20 12:59:13,331 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 17 times [2022-03-20 12:59:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418157298] [2022-03-20 12:59:13,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:13,333 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:13,333 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2109438419, now seen corresponding path program 18 times [2022-03-20 12:59:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029677459] [2022-03-20 12:59:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:13,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:13,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:13,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029677459] [2022-03-20 12:59:13,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029677459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:13,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079269700] [2022-03-20 12:59:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:13,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:13,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:13,391 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:13,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 12:59:13,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:13,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:13,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:13,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:59:13,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 12:59:13,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079269700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:13,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:13,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 18 [2022-03-20 12:59:13,568 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1418157298] [2022-03-20 12:59:13,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1418157298] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:13,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:13,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 12:59:13,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431481981] [2022-03-20 12:59:13,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:13,568 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 12:59:13,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 12:59:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2022-03-20 12:59:13,569 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) [2022-03-20 12:59:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:13,732 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-03-20 12:59:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 12:59:13,732 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 [2022-03-20 12:59:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:13,732 INFO L225 Difference]: With dead ends: 96 [2022-03-20 12:59:13,732 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 12:59:13,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2022-03-20 12:59:13,733 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 [2022-03-20 12:59:13,733 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] [2022-03-20 12:59:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 12:59:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-03-20 12:59:13,738 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) [2022-03-20 12:59:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-20 12:59:13,738 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2022-03-20 12:59:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:13,738 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-20 12:59:13,739 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) [2022-03-20 12:59:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-20 12:59:13,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 12:59:13,739 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:13,739 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:13,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:13,947 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 [2022-03-20 12:59:13,947 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 19 times [2022-03-20 12:59:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:13,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1725978112] [2022-03-20 12:59:13,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:13,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:13,949 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash -560708021, now seen corresponding path program 20 times [2022-03-20 12:59:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:13,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663955475] [2022-03-20 12:59:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:13,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:14,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663955475] [2022-03-20 12:59:14,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663955475] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:14,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398188295] [2022-03-20 12:59:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:14,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:14,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:14,020 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:14,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 12:59:14,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:14,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 12:59:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:14,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:14,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398188295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:14,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:14,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-03-20 12:59:14,280 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:14,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1725978112] [2022-03-20 12:59:14,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1725978112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:14,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:14,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 12:59:14,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591609165] [2022-03-20 12:59:14,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:14,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 12:59:14,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 12:59:14,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:59:14,282 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) [2022-03-20 12:59:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:14,443 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2022-03-20 12:59:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 12:59:14,443 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 [2022-03-20 12:59:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:14,443 INFO L225 Difference]: With dead ends: 103 [2022-03-20 12:59:14,444 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 12:59:14,444 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=486, Invalid=636, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 12:59:14,445 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 [2022-03-20 12:59:14,445 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] [2022-03-20 12:59:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 12:59:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2022-03-20 12:59:14,461 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) [2022-03-20 12:59:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-03-20 12:59:14,462 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 41 [2022-03-20 12:59:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:14,462 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-03-20 12:59:14,462 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) [2022-03-20 12:59:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-03-20 12:59:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 12:59:14,462 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:14,462 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:14,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:14,675 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 [2022-03-20 12:59:14,675 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 21 times [2022-03-20 12:59:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:14,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [483060132] [2022-03-20 12:59:14,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:14,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:14,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1710520041, now seen corresponding path program 22 times [2022-03-20 12:59:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016283317] [2022-03-20 12:59:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:14,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016283317] [2022-03-20 12:59:14,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016283317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803405391] [2022-03-20 12:59:14,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:14,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:14,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:14,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 12:59:14,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:14,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:14,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 12:59:14,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:14,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803405391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:15,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:15,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-20 12:59:15,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [483060132] [2022-03-20 12:59:15,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [483060132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:15,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:15,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 12:59:15,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722737643] [2022-03-20 12:59:15,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:15,071 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 12:59:15,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:15,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 12:59:15,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-20 12:59:15,072 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) [2022-03-20 12:59:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:15,260 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2022-03-20 12:59:15,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 12:59:15,260 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 [2022-03-20 12:59:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:15,262 INFO L225 Difference]: With dead ends: 110 [2022-03-20 12:59:15,262 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 12:59:15,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=578, Invalid=754, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 12:59:15,264 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 [2022-03-20 12:59:15,264 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] [2022-03-20 12:59:15,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 12:59:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2022-03-20 12:59:15,270 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) [2022-03-20 12:59:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-20 12:59:15,271 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2022-03-20 12:59:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:15,271 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-20 12:59:15,271 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) [2022-03-20 12:59:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-20 12:59:15,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 12:59:15,272 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:15,273 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:15,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:15,487 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 [2022-03-20 12:59:15,487 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 23 times [2022-03-20 12:59:15,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:15,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1534209990] [2022-03-20 12:59:15,489 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:15,489 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:15,489 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1777666041, now seen corresponding path program 24 times [2022-03-20 12:59:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:15,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403041967] [2022-03-20 12:59:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:15,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:15,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403041967] [2022-03-20 12:59:15,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403041967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48159195] [2022-03-20 12:59:15,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:15,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:15,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:15,582 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:15,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 12:59:15,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:15,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:15,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:59:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-20 12:59:15,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48159195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:15,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:15,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 21 [2022-03-20 12:59:15,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:15,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1534209990] [2022-03-20 12:59:15,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1534209990] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:15,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:15,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 12:59:15,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712566180] [2022-03-20 12:59:15,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:15,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 12:59:15,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:15,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 12:59:15,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2022-03-20 12:59:15,781 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) [2022-03-20 12:59:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:16,017 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2022-03-20 12:59:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 12:59:16,018 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 [2022-03-20 12:59:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:16,018 INFO L225 Difference]: With dead ends: 117 [2022-03-20 12:59:16,018 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 12:59:16,019 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 [2022-03-20 12:59:16,019 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 [2022-03-20 12:59:16,019 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] [2022-03-20 12:59:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 12:59:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-03-20 12:59:16,025 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) [2022-03-20 12:59:16,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-03-20 12:59:16,025 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2022-03-20 12:59:16,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:16,025 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-03-20 12:59:16,025 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) [2022-03-20 12:59:16,025 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-03-20 12:59:16,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 12:59:16,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:16,026 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:16,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:16,234 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 [2022-03-20 12:59:16,234 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 25 times [2022-03-20 12:59:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:16,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842893834] [2022-03-20 12:59:16,235 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:16,236 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:16,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 444967333, now seen corresponding path program 26 times [2022-03-20 12:59:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128579825] [2022-03-20 12:59:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:16,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:16,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128579825] [2022-03-20 12:59:16,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128579825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:16,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930922307] [2022-03-20 12:59:16,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:16,356 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:16,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 12:59:16,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:16,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:16,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 12:59:16,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:16,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930922307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:16,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:16,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-03-20 12:59:16,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842893834] [2022-03-20 12:59:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842893834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:16,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:16,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 12:59:16,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134038091] [2022-03-20 12:59:16,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:16,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 12:59:16,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 12:59:16,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-03-20 12:59:16,712 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) [2022-03-20 12:59:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:16,950 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-03-20 12:59:16,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 12:59:16,951 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 [2022-03-20 12:59:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:16,951 INFO L225 Difference]: With dead ends: 124 [2022-03-20 12:59:16,951 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 12:59:16,952 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 12:59:16,952 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 [2022-03-20 12:59:16,952 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] [2022-03-20 12:59:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 12:59:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 50. [2022-03-20 12:59:16,958 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) [2022-03-20 12:59:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-03-20 12:59:16,959 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 47 [2022-03-20 12:59:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:16,959 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-03-20 12:59:16,959 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) [2022-03-20 12:59:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-03-20 12:59:16,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 12:59:16,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:16,960 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:16,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:17,163 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 [2022-03-20 12:59:17,163 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 27 times [2022-03-20 12:59:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [838650880] [2022-03-20 12:59:17,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:17,165 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:17,165 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:17,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1796893635, now seen corresponding path program 28 times [2022-03-20 12:59:17,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378432971] [2022-03-20 12:59:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:17,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:17,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:17,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378432971] [2022-03-20 12:59:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378432971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147436479] [2022-03-20 12:59:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:17,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:17,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:17,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 12:59:17,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:17,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 12:59:17,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:17,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147436479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:17,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:17,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-03-20 12:59:17,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [838650880] [2022-03-20 12:59:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [838650880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:17,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:17,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 12:59:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666195277] [2022-03-20 12:59:17,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:17,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 12:59:17,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 12:59:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-03-20 12:59:17,680 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) [2022-03-20 12:59:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:17,950 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2022-03-20 12:59:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 12:59:17,952 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 [2022-03-20 12:59:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:17,952 INFO L225 Difference]: With dead ends: 131 [2022-03-20 12:59:17,952 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 12:59:17,953 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=902, Invalid=1168, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 12:59:17,953 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 [2022-03-20 12:59:17,954 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] [2022-03-20 12:59:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 12:59:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 52. [2022-03-20 12:59:17,960 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) [2022-03-20 12:59:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-03-20 12:59:17,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 49 [2022-03-20 12:59:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:17,960 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-03-20 12:59:17,960 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) [2022-03-20 12:59:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-03-20 12:59:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 12:59:17,961 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:17,961 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:17,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:18,175 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 [2022-03-20 12:59:18,175 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:18,176 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 29 times [2022-03-20 12:59:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:18,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1993253640] [2022-03-20 12:59:18,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:18,177 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:18,177 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:18,177 INFO L85 PathProgramCache]: Analyzing trace with hash -377020831, now seen corresponding path program 30 times [2022-03-20 12:59:18,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:18,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622511714] [2022-03-20 12:59:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:18,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:18,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622511714] [2022-03-20 12:59:18,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622511714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063082582] [2022-03-20 12:59:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:18,309 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:18,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 12:59:18,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:18,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:59:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-20 12:59:18,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063082582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:18,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:18,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 7] total 24 [2022-03-20 12:59:18,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1993253640] [2022-03-20 12:59:18,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1993253640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:18,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:18,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 12:59:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108786330] [2022-03-20 12:59:18,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:18,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 12:59:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 12:59:18,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2022-03-20 12:59:18,520 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) [2022-03-20 12:59:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:18,804 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2022-03-20 12:59:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 12:59:18,805 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 [2022-03-20 12:59:18,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:18,805 INFO L225 Difference]: With dead ends: 138 [2022-03-20 12:59:18,805 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 12:59:18,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=532, Invalid=950, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 12:59:18,806 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 [2022-03-20 12:59:18,806 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] [2022-03-20 12:59:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 12:59:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2022-03-20 12:59:18,813 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) [2022-03-20 12:59:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-03-20 12:59:18,813 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2022-03-20 12:59:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:18,813 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-03-20 12:59:18,814 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) [2022-03-20 12:59:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-03-20 12:59:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 12:59:18,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:18,814 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:18,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:19,015 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 [2022-03-20 12:59:19,015 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:19,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 31 times [2022-03-20 12:59:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820312746] [2022-03-20 12:59:19,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:19,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:19,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2140250495, now seen corresponding path program 32 times [2022-03-20 12:59:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:19,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849413024] [2022-03-20 12:59:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:19,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:19,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:19,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849413024] [2022-03-20 12:59:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849413024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484294240] [2022-03-20 12:59:19,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:19,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:19,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:19,150 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:19,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 12:59:19,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:19,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:19,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 12:59:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:19,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484294240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:19,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:19,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 12:59:19,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:19,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820312746] [2022-03-20 12:59:19,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820312746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:19,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:19,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 12:59:19,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318973986] [2022-03-20 12:59:19,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:19,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 12:59:19,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 12:59:19,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:59:19,578 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) [2022-03-20 12:59:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:19,908 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2022-03-20 12:59:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 12:59:19,909 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 [2022-03-20 12:59:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:19,909 INFO L225 Difference]: With dead ends: 145 [2022-03-20 12:59:19,909 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 12:59:19,910 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1158, Invalid=1494, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 12:59:19,910 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:19,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 37 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 12:59:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 56. [2022-03-20 12:59:19,918 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) [2022-03-20 12:59:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-03-20 12:59:19,918 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2022-03-20 12:59:19,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:19,918 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-03-20 12:59:19,918 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) [2022-03-20 12:59:19,918 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-03-20 12:59:19,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 12:59:19,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:19,919 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:19,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:20,125 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 [2022-03-20 12:59:20,125 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 33 times [2022-03-20 12:59:20,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:20,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684996413] [2022-03-20 12:59:20,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:20,127 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:20,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1123560163, now seen corresponding path program 34 times [2022-03-20 12:59:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:20,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810220044] [2022-03-20 12:59:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:20,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810220044] [2022-03-20 12:59:20,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810220044] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646576758] [2022-03-20 12:59:20,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:20,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:20,273 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 12:59:20,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:20,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:20,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 12:59:20,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:20,409 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:20,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:20,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646576758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:20,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:20,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 38 [2022-03-20 12:59:20,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:20,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684996413] [2022-03-20 12:59:20,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684996413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:20,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:20,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 12:59:20,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28226123] [2022-03-20 12:59:20,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:20,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 12:59:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 12:59:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 12:59:20,745 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) [2022-03-20 12:59:21,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:21,079 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-03-20 12:59:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 12:59:21,079 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 [2022-03-20 12:59:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:21,080 INFO L225 Difference]: With dead ends: 152 [2022-03-20 12:59:21,080 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 12:59:21,080 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 [2022-03-20 12:59:21,081 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 [2022-03-20 12:59:21,081 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] [2022-03-20 12:59:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 12:59:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 58. [2022-03-20 12:59:21,089 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) [2022-03-20 12:59:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-03-20 12:59:21,089 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 55 [2022-03-20 12:59:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:21,089 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-03-20 12:59:21,089 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) [2022-03-20 12:59:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-03-20 12:59:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 12:59:21,090 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:21,090 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:21,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:21,291 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 [2022-03-20 12:59:21,291 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:21,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 35 times [2022-03-20 12:59:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:21,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963530537] [2022-03-20 12:59:21,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:21,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:21,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1975490875, now seen corresponding path program 36 times [2022-03-20 12:59:21,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:21,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500203549] [2022-03-20 12:59:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:21,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500203549] [2022-03-20 12:59:21,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500203549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:21,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972096957] [2022-03-20 12:59:21,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:21,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:21,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:21,452 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:21,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 12:59:21,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:21,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:21,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:21,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 12:59:21,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-03-20 12:59:21,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972096957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:21,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:21,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2022-03-20 12:59:21,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:21,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963530537] [2022-03-20 12:59:21,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963530537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:21,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:21,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 12:59:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173982893] [2022-03-20 12:59:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:21,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 12:59:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:21,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 12:59:21,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2022-03-20 12:59:21,692 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) [2022-03-20 12:59:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:22,071 INFO L93 Difference]: Finished difference Result 159 states and 199 transitions. [2022-03-20 12:59:22,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 12:59:22,071 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 [2022-03-20 12:59:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:22,072 INFO L225 Difference]: With dead ends: 159 [2022-03-20 12:59:22,072 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 12:59:22,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=715, Invalid=1265, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 12:59:22,073 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:22,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 32 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 12:59:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 60. [2022-03-20 12:59:22,082 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) [2022-03-20 12:59:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-03-20 12:59:22,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 57 [2022-03-20 12:59:22,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:22,083 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-03-20 12:59:22,083 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) [2022-03-20 12:59:22,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-03-20 12:59:22,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 12:59:22,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:22,085 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:22,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:22,299 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 [2022-03-20 12:59:22,299 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:22,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:22,300 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 37 times [2022-03-20 12:59:22,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:22,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356946672] [2022-03-20 12:59:22,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:22,301 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:22,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash -543765031, now seen corresponding path program 38 times [2022-03-20 12:59:22,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422711147] [2022-03-20 12:59:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:22,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:22,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:22,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422711147] [2022-03-20 12:59:22,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422711147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:22,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38236554] [2022-03-20 12:59:22,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:22,472 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:22,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 12:59:22,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:22,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 12:59:22,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:22,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:23,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38236554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:23,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:23,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 42 [2022-03-20 12:59:23,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:23,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356946672] [2022-03-20 12:59:23,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356946672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:23,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:23,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 12:59:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588040155] [2022-03-20 12:59:23,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:23,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 12:59:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 12:59:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:59:23,010 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) [2022-03-20 12:59:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:23,412 INFO L93 Difference]: Finished difference Result 166 states and 208 transitions. [2022-03-20 12:59:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 12:59:23,414 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 [2022-03-20 12:59:23,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:23,415 INFO L225 Difference]: With dead ends: 166 [2022-03-20 12:59:23,415 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 12:59:23,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1602, Invalid=2058, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 12:59:23,416 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:23,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 32 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 12:59:23,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 12:59:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 62. [2022-03-20 12:59:23,425 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) [2022-03-20 12:59:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-03-20 12:59:23,425 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2022-03-20 12:59:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:23,426 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-03-20 12:59:23,426 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) [2022-03-20 12:59:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-03-20 12:59:23,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 12:59:23,426 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:23,426 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:23,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:23,627 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 [2022-03-20 12:59:23,627 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 39 times [2022-03-20 12:59:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:23,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764642044] [2022-03-20 12:59:23,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:23,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:23,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash 812864247, now seen corresponding path program 40 times [2022-03-20 12:59:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:23,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172314689] [2022-03-20 12:59:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:23,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:23,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:23,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172314689] [2022-03-20 12:59:23,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172314689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:23,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144740829] [2022-03-20 12:59:23,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:23,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:23,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:23,804 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:23,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 12:59:23,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:23,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 12:59:23,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:24,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144740829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:24,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:24,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 44 [2022-03-20 12:59:24,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764642044] [2022-03-20 12:59:24,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764642044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:24,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:24,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 12:59:24,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392723334] [2022-03-20 12:59:24,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:24,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 12:59:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 12:59:24,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 12:59:24,365 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) [2022-03-20 12:59:24,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:24,814 INFO L93 Difference]: Finished difference Result 173 states and 217 transitions. [2022-03-20 12:59:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 12:59:24,814 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 [2022-03-20 12:59:24,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:24,815 INFO L225 Difference]: With dead ends: 173 [2022-03-20 12:59:24,815 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 12:59:24,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1766, Invalid=2266, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 12:59:24,816 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 [2022-03-20 12:59:24,816 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] [2022-03-20 12:59:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 12:59:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 64. [2022-03-20 12:59:24,826 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) [2022-03-20 12:59:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-03-20 12:59:24,826 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2022-03-20 12:59:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:24,826 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-03-20 12:59:24,826 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) [2022-03-20 12:59:24,827 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-03-20 12:59:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 12:59:24,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:24,827 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:25,032 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 [2022-03-20 12:59:25,032 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:25,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:25,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 41 times [2022-03-20 12:59:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:25,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [547307317] [2022-03-20 12:59:25,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:25,033 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:25,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1136457579, now seen corresponding path program 42 times [2022-03-20 12:59:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:25,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362458812] [2022-03-20 12:59:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:25,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362458812] [2022-03-20 12:59:25,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362458812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741123675] [2022-03-20 12:59:25,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:25,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:25,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:25,209 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:25,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 12:59:25,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:25,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:25,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 12:59:25,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-20 12:59:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741123675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:25,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 30 [2022-03-20 12:59:25,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [547307317] [2022-03-20 12:59:25,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [547307317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:25,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:25,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 12:59:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637797571] [2022-03-20 12:59:25,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:25,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 12:59:25,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:25,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 12:59:25,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2022-03-20 12:59:25,469 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) [2022-03-20 12:59:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:25,945 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2022-03-20 12:59:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 12:59:25,945 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 [2022-03-20 12:59:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:25,946 INFO L225 Difference]: With dead ends: 180 [2022-03-20 12:59:25,946 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 12:59:25,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=925, Invalid=1625, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 12:59:25,947 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 433 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:59:25,947 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] [2022-03-20 12:59:25,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 12:59:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 66. [2022-03-20 12:59:25,958 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) [2022-03-20 12:59:25,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-03-20 12:59:25,958 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2022-03-20 12:59:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:25,958 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-03-20 12:59:25,958 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) [2022-03-20 12:59:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-03-20 12:59:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 12:59:25,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:25,959 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:25,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:26,167 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 [2022-03-20 12:59:26,167 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 43 times [2022-03-20 12:59:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:26,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [358847850] [2022-03-20 12:59:26,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:26,169 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:26,169 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1828991309, now seen corresponding path program 44 times [2022-03-20 12:59:26,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:26,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059996392] [2022-03-20 12:59:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:26,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:26,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059996392] [2022-03-20 12:59:26,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059996392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:26,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951998767] [2022-03-20 12:59:26,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:26,368 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:26,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 12:59:26,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:26,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 12:59:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:26,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951998767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:27,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-03-20 12:59:27,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:27,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [358847850] [2022-03-20 12:59:27,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [358847850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:27,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:27,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 12:59:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814336291] [2022-03-20 12:59:27,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:27,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 12:59:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:27,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 12:59:27,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 12:59:27,048 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) [2022-03-20 12:59:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:27,574 INFO L93 Difference]: Finished difference Result 187 states and 235 transitions. [2022-03-20 12:59:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 12:59:27,575 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 [2022-03-20 12:59:27,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:27,575 INFO L225 Difference]: With dead ends: 187 [2022-03-20 12:59:27,575 INFO L226 Difference]: Without dead ends: 170 [2022-03-20 12:59:27,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2118, Invalid=2712, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 12:59:27,577 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 474 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:59:27,577 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] [2022-03-20 12:59:27,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-03-20 12:59:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 68. [2022-03-20 12:59:27,588 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) [2022-03-20 12:59:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-03-20 12:59:27,589 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 65 [2022-03-20 12:59:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:27,589 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-03-20 12:59:27,589 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) [2022-03-20 12:59:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-03-20 12:59:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 12:59:27,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:27,589 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:27,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 12:59:27,790 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 [2022-03-20 12:59:27,790 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 45 times [2022-03-20 12:59:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1398102301] [2022-03-20 12:59:27,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:27,792 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:27,792 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:27,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1633974959, now seen corresponding path program 46 times [2022-03-20 12:59:27,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361759291] [2022-03-20 12:59:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:27,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:28,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:28,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:28,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361759291] [2022-03-20 12:59:28,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361759291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:28,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059688029] [2022-03-20 12:59:28,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:28,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:28,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:28,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:28,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 12:59:28,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:28,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-20 12:59:28,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:28,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:28,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059688029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:28,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:28,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-03-20 12:59:28,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:28,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1398102301] [2022-03-20 12:59:28,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1398102301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:28,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:28,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 12:59:28,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599979270] [2022-03-20 12:59:28,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:28,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 12:59:28,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:28,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 12:59:28,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 12:59:28,741 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) [2022-03-20 12:59:29,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:29,295 INFO L93 Difference]: Finished difference Result 194 states and 244 transitions. [2022-03-20 12:59:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 12:59:29,295 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 [2022-03-20 12:59:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:29,296 INFO L225 Difference]: With dead ends: 194 [2022-03-20 12:59:29,296 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 12:59:29,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2306, Invalid=2950, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 12:59:29,297 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 399 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:59:29,297 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] [2022-03-20 12:59:29,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 12:59:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 70. [2022-03-20 12:59:29,310 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) [2022-03-20 12:59:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-03-20 12:59:29,310 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2022-03-20 12:59:29,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:29,310 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-03-20 12:59:29,311 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) [2022-03-20 12:59:29,311 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-03-20 12:59:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 12:59:29,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:29,311 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:29,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:29,511 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 [2022-03-20 12:59:29,511 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:29,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 47 times [2022-03-20 12:59:29,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:29,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342695551] [2022-03-20 12:59:29,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:29,513 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:29,513 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1093143663, now seen corresponding path program 48 times [2022-03-20 12:59:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:29,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052921666] [2022-03-20 12:59:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:29,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:29,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:29,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052921666] [2022-03-20 12:59:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052921666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785099070] [2022-03-20 12:59:29,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:29,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:29,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:29,729 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:29,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 12:59:29,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:29,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 12:59:29,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2022-03-20 12:59:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785099070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:30,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:30,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 7, 7] total 33 [2022-03-20 12:59:30,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342695551] [2022-03-20 12:59:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342695551] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:30,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:30,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 12:59:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318288986] [2022-03-20 12:59:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:30,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 12:59:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 12:59:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 12:59:30,046 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) [2022-03-20 12:59:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:30,684 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-03-20 12:59:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 12:59:30,685 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 [2022-03-20 12:59:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:30,685 INFO L225 Difference]: With dead ends: 201 [2022-03-20 12:59:30,685 INFO L226 Difference]: Without dead ends: 184 [2022-03-20 12:59:30,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1162, Invalid=2030, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 12:59:30,686 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 517 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-03-20 12:59:30,686 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] [2022-03-20 12:59:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-20 12:59:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 72. [2022-03-20 12:59:30,701 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) [2022-03-20 12:59:30,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-03-20 12:59:30,701 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2022-03-20 12:59:30,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:30,701 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-03-20 12:59:30,702 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) [2022-03-20 12:59:30,702 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-03-20 12:59:30,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 12:59:30,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:30,702 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:30,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:30,919 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 [2022-03-20 12:59:30,919 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 49 times [2022-03-20 12:59:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:30,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670611149] [2022-03-20 12:59:30,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:30,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:30,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1924088845, now seen corresponding path program 50 times [2022-03-20 12:59:30,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:30,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115585928] [2022-03-20 12:59:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:30,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115585928] [2022-03-20 12:59:31,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115585928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771545483] [2022-03-20 12:59:31,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:31,178 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 12:59:31,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:31,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 12:59:31,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:31,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:31,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771545483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:31,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:31,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-03-20 12:59:31,949 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:31,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670611149] [2022-03-20 12:59:31,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670611149] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:31,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:31,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 12:59:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071643127] [2022-03-20 12:59:31,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:31,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 12:59:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:31,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 12:59:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 12:59:31,950 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) [2022-03-20 12:59:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:32,610 INFO L93 Difference]: Finished difference Result 208 states and 262 transitions. [2022-03-20 12:59:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 12:59:32,611 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 [2022-03-20 12:59:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:32,612 INFO L225 Difference]: With dead ends: 208 [2022-03-20 12:59:32,612 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 12:59:32,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2706, Invalid=3456, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 12:59:32,613 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 [2022-03-20 12:59:32,613 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] [2022-03-20 12:59:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 12:59:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 74. [2022-03-20 12:59:32,627 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) [2022-03-20 12:59:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-03-20 12:59:32,628 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 71 [2022-03-20 12:59:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:32,628 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-03-20 12:59:32,628 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) [2022-03-20 12:59:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-03-20 12:59:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 12:59:32,628 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:32,628 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:32,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:32,843 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 [2022-03-20 12:59:32,843 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 51 times [2022-03-20 12:59:32,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:32,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272050519] [2022-03-20 12:59:32,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:32,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:32,845 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1598491691, now seen corresponding path program 52 times [2022-03-20 12:59:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961814345] [2022-03-20 12:59:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:33,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:33,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:33,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961814345] [2022-03-20 12:59:33,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961814345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:33,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135486765] [2022-03-20 12:59:33,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:33,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:33,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:33,098 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:33,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 12:59:33,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:33,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:33,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 12:59:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:33,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135486765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:33,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:33,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 56 [2022-03-20 12:59:33,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272050519] [2022-03-20 12:59:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272050519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:33,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:33,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 12:59:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650135849] [2022-03-20 12:59:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:33,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 12:59:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 12:59:33,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 12:59:33,925 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) [2022-03-20 12:59:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:34,661 INFO L93 Difference]: Finished difference Result 215 states and 271 transitions. [2022-03-20 12:59:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 12:59:34,661 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 [2022-03-20 12:59:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:34,662 INFO L225 Difference]: With dead ends: 215 [2022-03-20 12:59:34,662 INFO L226 Difference]: Without dead ends: 198 [2022-03-20 12:59:34,663 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2918, Invalid=3724, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 12:59:34,663 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 [2022-03-20 12:59:34,663 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] [2022-03-20 12:59:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-20 12:59:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 76. [2022-03-20 12:59:34,679 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) [2022-03-20 12:59:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-03-20 12:59:34,679 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2022-03-20 12:59:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:34,679 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-03-20 12:59:34,679 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) [2022-03-20 12:59:34,680 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-03-20 12:59:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 12:59:34,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:34,680 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:34,895 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 [2022-03-20 12:59:34,895 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 53 times [2022-03-20 12:59:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183125804] [2022-03-20 12:59:34,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:34,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:34,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:34,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2062727991, now seen corresponding path program 54 times [2022-03-20 12:59:34,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:34,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568846709] [2022-03-20 12:59:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:34,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:35,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:35,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:35,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568846709] [2022-03-20 12:59:35,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568846709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:35,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619396714] [2022-03-20 12:59:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:35,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:35,176 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:35,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 12:59:35,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:35,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 12:59:35,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 12:59:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619396714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:35,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:35,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 7, 7] total 36 [2022-03-20 12:59:35,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183125804] [2022-03-20 12:59:35,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183125804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:35,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:35,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 12:59:35,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651739910] [2022-03-20 12:59:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:35,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 12:59:35,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:35,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 12:59:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 12:59:35,515 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) [2022-03-20 12:59:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:36,359 INFO L93 Difference]: Finished difference Result 222 states and 280 transitions. [2022-03-20 12:59:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 12:59:36,360 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 [2022-03-20 12:59:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:36,361 INFO L225 Difference]: With dead ends: 222 [2022-03-20 12:59:36,361 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 12:59:36,361 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 [2022-03-20 12:59:36,362 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:36,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 32 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:59:36,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 12:59:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 78. [2022-03-20 12:59:36,379 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) [2022-03-20 12:59:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-03-20 12:59:36,379 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2022-03-20 12:59:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:36,379 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-03-20 12:59:36,380 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) [2022-03-20 12:59:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-03-20 12:59:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 12:59:36,380 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:36,380 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:36,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 12:59:36,580 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 [2022-03-20 12:59:36,581 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 55 times [2022-03-20 12:59:36,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1236268904] [2022-03-20 12:59:36,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:36,582 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:36,582 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1378340327, now seen corresponding path program 56 times [2022-03-20 12:59:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10919267] [2022-03-20 12:59:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:36,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10919267] [2022-03-20 12:59:36,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10919267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:36,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54321008] [2022-03-20 12:59:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:36,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:36,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:36,880 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 12:59:36,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:36,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:36,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 12:59:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:37,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:37,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54321008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:37,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:37,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 60 [2022-03-20 12:59:37,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:37,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1236268904] [2022-03-20 12:59:37,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1236268904] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:37,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:37,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 12:59:37,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516440796] [2022-03-20 12:59:37,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:37,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 12:59:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 12:59:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 12:59:37,820 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) [2022-03-20 12:59:38,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:38,637 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-03-20 12:59:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 12:59:38,638 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 [2022-03-20 12:59:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:38,639 INFO L225 Difference]: With dead ends: 229 [2022-03-20 12:59:38,639 INFO L226 Difference]: Without dead ends: 212 [2022-03-20 12:59:38,639 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3366, Invalid=4290, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 12:59:38,640 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 [2022-03-20 12:59:38,640 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] [2022-03-20 12:59:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-20 12:59:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 80. [2022-03-20 12:59:38,658 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) [2022-03-20 12:59:38,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2022-03-20 12:59:38,658 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2022-03-20 12:59:38,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:38,658 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2022-03-20 12:59:38,658 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) [2022-03-20 12:59:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2022-03-20 12:59:38,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 12:59:38,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:38,659 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:38,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:38,875 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 [2022-03-20 12:59:38,876 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 57 times [2022-03-20 12:59:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636347064] [2022-03-20 12:59:38,878 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:38,878 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:38,878 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1120176005, now seen corresponding path program 58 times [2022-03-20 12:59:38,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:38,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634452533] [2022-03-20 12:59:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:39,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634452533] [2022-03-20 12:59:39,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634452533] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240143924] [2022-03-20 12:59:39,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:39,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:39,172 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:39,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 12:59:39,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:39,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 12:59:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:39,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:40,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240143924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:40,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:40,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 62 [2022-03-20 12:59:40,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636347064] [2022-03-20 12:59:40,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636347064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:40,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:40,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 12:59:40,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372615144] [2022-03-20 12:59:40,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:40,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 12:59:40,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 12:59:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 12:59:40,174 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) [2022-03-20 12:59:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:41,086 INFO L93 Difference]: Finished difference Result 236 states and 298 transitions. [2022-03-20 12:59:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 12:59:41,086 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 [2022-03-20 12:59:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:41,087 INFO L225 Difference]: With dead ends: 236 [2022-03-20 12:59:41,087 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 12:59:41,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3602, Invalid=4588, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 12:59:41,088 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:41,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 22 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:59:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 12:59:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 82. [2022-03-20 12:59:41,108 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) [2022-03-20 12:59:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-03-20 12:59:41,108 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 79 [2022-03-20 12:59:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:41,109 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-03-20 12:59:41,109 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) [2022-03-20 12:59:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-03-20 12:59:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 12:59:41,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:41,109 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:41,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:41,326 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 [2022-03-20 12:59:41,326 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 59 times [2022-03-20 12:59:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583702312] [2022-03-20 12:59:41,328 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:41,328 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:41,328 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:41,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2132365731, now seen corresponding path program 60 times [2022-03-20 12:59:41,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:41,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655981342] [2022-03-20 12:59:41,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:41,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:41,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:41,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655981342] [2022-03-20 12:59:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655981342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:41,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264547374] [2022-03-20 12:59:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:41,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:41,654 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 12:59:41,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 12:59:41,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 12:59:42,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264547374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:42,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:42,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 39 [2022-03-20 12:59:42,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583702312] [2022-03-20 12:59:42,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583702312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:42,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:42,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 12:59:42,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875765159] [2022-03-20 12:59:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:42,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 12:59:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:42,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 12:59:42,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 12:59:42,007 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) [2022-03-20 12:59:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:42,979 INFO L93 Difference]: Finished difference Result 243 states and 307 transitions. [2022-03-20 12:59:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 12:59:42,979 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 [2022-03-20 12:59:42,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:42,980 INFO L225 Difference]: With dead ends: 243 [2022-03-20 12:59:42,980 INFO L226 Difference]: Without dead ends: 226 [2022-03-20 12:59:42,981 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1717, Invalid=2975, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 12:59:42,981 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 [2022-03-20 12:59:42,981 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] [2022-03-20 12:59:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-20 12:59:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 84. [2022-03-20 12:59:43,002 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) [2022-03-20 12:59:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2022-03-20 12:59:43,002 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 81 [2022-03-20 12:59:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:43,002 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2022-03-20 12:59:43,002 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) [2022-03-20 12:59:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2022-03-20 12:59:43,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 12:59:43,003 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:43,003 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:43,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:43,219 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 [2022-03-20 12:59:43,219 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:43,219 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 61 times [2022-03-20 12:59:43,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:43,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983114420] [2022-03-20 12:59:43,221 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:43,221 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:43,221 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash -110883775, now seen corresponding path program 62 times [2022-03-20 12:59:43,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:43,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903628223] [2022-03-20 12:59:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:43,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:43,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903628223] [2022-03-20 12:59:43,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903628223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765782588] [2022-03-20 12:59:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:43,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:43,566 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:43,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 12:59:43,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:43,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 12:59:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 910 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765782588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:44,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:44,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 66 [2022-03-20 12:59:44,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:44,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983114420] [2022-03-20 12:59:44,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983114420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:44,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:44,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 12:59:44,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815716740] [2022-03-20 12:59:44,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:44,723 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 12:59:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 12:59:44,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 12:59:44,724 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) [2022-03-20 12:59:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:45,755 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2022-03-20 12:59:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 12:59:45,756 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 [2022-03-20 12:59:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:45,757 INFO L225 Difference]: With dead ends: 250 [2022-03-20 12:59:45,757 INFO L226 Difference]: Without dead ends: 233 [2022-03-20 12:59:45,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4098, Invalid=5214, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 12:59:45,757 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:45,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 27 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 12:59:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-20 12:59:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 86. [2022-03-20 12:59:45,780 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) [2022-03-20 12:59:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-03-20 12:59:45,780 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2022-03-20 12:59:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:45,781 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-03-20 12:59:45,781 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) [2022-03-20 12:59:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-03-20 12:59:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 12:59:45,781 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:45,781 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:45,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 12:59:45,990 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 [2022-03-20 12:59:45,990 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 63 times [2022-03-20 12:59:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:45,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159994004] [2022-03-20 12:59:45,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:45,992 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:45,992 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 199923551, now seen corresponding path program 64 times [2022-03-20 12:59:45,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:45,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967450856] [2022-03-20 12:59:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:46,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967450856] [2022-03-20 12:59:46,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967450856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324455321] [2022-03-20 12:59:46,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:46,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:46,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:46,370 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:46,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 12:59:46,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 12:59:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:46,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:47,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324455321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:47,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:47,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 68 [2022-03-20 12:59:47,538 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159994004] [2022-03-20 12:59:47,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159994004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:47,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:47,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 12:59:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960221125] [2022-03-20 12:59:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:47,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 12:59:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 12:59:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 12:59:47,539 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) [2022-03-20 12:59:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:48,668 INFO L93 Difference]: Finished difference Result 257 states and 325 transitions. [2022-03-20 12:59:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 12:59:48,668 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 [2022-03-20 12:59:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:48,669 INFO L225 Difference]: With dead ends: 257 [2022-03-20 12:59:48,669 INFO L226 Difference]: Without dead ends: 240 [2022-03-20 12:59:48,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4358, Invalid=5542, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 12:59:48,670 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 741 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 12:59:48,670 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] [2022-03-20 12:59:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-20 12:59:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 88. [2022-03-20 12:59:48,694 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) [2022-03-20 12:59:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-03-20 12:59:48,694 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2022-03-20 12:59:48,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:48,694 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-03-20 12:59:48,694 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) [2022-03-20 12:59:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-03-20 12:59:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 12:59:48,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:48,695 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:48,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-20 12:59:48,895 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 [2022-03-20 12:59:48,895 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 65 times [2022-03-20 12:59:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:48,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846985803] [2022-03-20 12:59:48,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:48,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:48,897 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1761946883, now seen corresponding path program 66 times [2022-03-20 12:59:48,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:48,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758339373] [2022-03-20 12:59:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:48,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:49,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:49,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758339373] [2022-03-20 12:59:49,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758339373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:49,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069686550] [2022-03-20 12:59:49,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:49,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:49,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:49,259 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 12:59:49,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 12:59:49,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1034 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2022-03-20 12:59:49,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069686550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:49,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:49,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 7, 7] total 42 [2022-03-20 12:59:49,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:49,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846985803] [2022-03-20 12:59:49,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846985803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:49,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:49,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 12:59:49,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531296911] [2022-03-20 12:59:49,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:49,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 12:59:49,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 12:59:49,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 12:59:49,629 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) [2022-03-20 12:59:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:50,825 INFO L93 Difference]: Finished difference Result 264 states and 334 transitions. [2022-03-20 12:59:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 12:59:50,825 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 [2022-03-20 12:59:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:50,826 INFO L225 Difference]: With dead ends: 264 [2022-03-20 12:59:50,826 INFO L226 Difference]: Without dead ends: 247 [2022-03-20 12:59:50,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2035, Invalid=3515, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 12:59:50,827 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 696 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 12:59:50,827 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] [2022-03-20 12:59:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-20 12:59:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 90. [2022-03-20 12:59:50,851 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) [2022-03-20 12:59:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2022-03-20 12:59:50,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2022-03-20 12:59:50,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:50,852 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2022-03-20 12:59:50,852 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) [2022-03-20 12:59:50,852 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2022-03-20 12:59:50,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 12:59:50,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:50,853 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:50,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:51,054 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 [2022-03-20 12:59:51,054 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 67 times [2022-03-20 12:59:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414195994] [2022-03-20 12:59:51,055 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:51,056 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:51,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1628791013, now seen corresponding path program 68 times [2022-03-20 12:59:51,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050430124] [2022-03-20 12:59:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:51,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:51,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:51,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050430124] [2022-03-20 12:59:51,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050430124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:51,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428753134] [2022-03-20 12:59:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 12:59:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:51,451 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 12:59:51,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 12:59:51,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 12:59:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 12:59:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:51,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1099 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:52,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428753134] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:52,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:52,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 72 [2022-03-20 12:59:52,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:52,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414195994] [2022-03-20 12:59:52,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414195994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:52,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:52,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 12:59:52,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019660294] [2022-03-20 12:59:52,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:52,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 12:59:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:52,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 12:59:52,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 12:59:52,791 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) [2022-03-20 12:59:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:54,065 INFO L93 Difference]: Finished difference Result 271 states and 343 transitions. [2022-03-20 12:59:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 12:59:54,065 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 [2022-03-20 12:59:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:54,066 INFO L225 Difference]: With dead ends: 271 [2022-03-20 12:59:54,066 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 12:59:54,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4902, Invalid=6228, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 12:59:54,067 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 888 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 12:59:54,067 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] [2022-03-20 12:59:54,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 12:59:54,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 92. [2022-03-20 12:59:54,094 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) [2022-03-20 12:59:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2022-03-20 12:59:54,094 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2022-03-20 12:59:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:54,094 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2022-03-20 12:59:54,095 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) [2022-03-20 12:59:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2022-03-20 12:59:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 12:59:54,095 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:54,095 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:54,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 12:59:54,311 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 [2022-03-20 12:59:54,311 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 69 times [2022-03-20 12:59:54,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585382710] [2022-03-20 12:59:54,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:54,313 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:54,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:54,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1779948473, now seen corresponding path program 70 times [2022-03-20 12:59:54,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:54,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710040715] [2022-03-20 12:59:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:54,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:54,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:54,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710040715] [2022-03-20 12:59:54,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710040715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:54,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803806558] [2022-03-20 12:59:54,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 12:59:54,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:54,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:54,715 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) [2022-03-20 12:59:54,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 12:59:54,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 12:59:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:54,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 12:59:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:56,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803806558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:56,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:56,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 74 [2022-03-20 12:59:56,070 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:56,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585382710] [2022-03-20 12:59:56,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585382710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:56,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:56,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 12:59:56,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543142395] [2022-03-20 12:59:56,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:56,070 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 12:59:56,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 12:59:56,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 12:59:56,071 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) [2022-03-20 12:59:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:57,496 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-03-20 12:59:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 12:59:57,497 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 [2022-03-20 12:59:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:57,498 INFO L225 Difference]: With dead ends: 278 [2022-03-20 12:59:57,498 INFO L226 Difference]: Without dead ends: 261 [2022-03-20 12:59:57,498 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5186, Invalid=6586, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 12:59:57,499 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 798 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 12:59:57,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 47 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 12:59:57,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-20 12:59:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 94. [2022-03-20 12:59:57,526 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) [2022-03-20 12:59:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-03-20 12:59:57,527 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 91 [2022-03-20 12:59:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 12:59:57,527 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-03-20 12:59:57,527 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) [2022-03-20 12:59:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-03-20 12:59:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 12:59:57,527 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 12:59:57,527 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 12:59:57,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 12:59:57,728 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 [2022-03-20 12:59:57,728 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 12:59:57,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 12:59:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 71 times [2022-03-20 12:59:57,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420510127] [2022-03-20 12:59:57,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 12:59:57,730 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 12:59:57,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 12:59:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash 518547671, now seen corresponding path program 72 times [2022-03-20 12:59:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 12:59:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952775073] [2022-03-20 12:59:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 12:59:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 12:59:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:58,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 12:59:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 12:59:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 12:59:58,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 12:59:58,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952775073] [2022-03-20 12:59:58,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952775073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 12:59:58,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759764272] [2022-03-20 12:59:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 12:59:58,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 12:59:58,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 12:59:58,140 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) [2022-03-20 12:59:58,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 12:59:58,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 12:59:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 12:59:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 12:59:58,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 12:59:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 12:59:58,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 12:59:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-03-20 12:59:58,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759764272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 12:59:58,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 12:59:58,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 7, 7] total 45 [2022-03-20 12:59:58,526 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 12:59:58,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420510127] [2022-03-20 12:59:58,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420510127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 12:59:58,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 12:59:58,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 12:59:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049922400] [2022-03-20 12:59:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 12:59:58,526 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 12:59:58,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 12:59:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 12:59:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 12:59:58,527 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) [2022-03-20 12:59:59,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 12:59:59,982 INFO L93 Difference]: Finished difference Result 285 states and 361 transitions. [2022-03-20 12:59:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 12:59:59,982 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 [2022-03-20 12:59:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 12:59:59,983 INFO L225 Difference]: With dead ends: 285 [2022-03-20 12:59:59,983 INFO L226 Difference]: Without dead ends: 268 [2022-03-20 12:59:59,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2380, Invalid=4100, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 12:59:59,984 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 884 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 12:59:59,984 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] [2022-03-20 12:59:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-20 13:00:00,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 96. [2022-03-20 13:00:00,013 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) [2022-03-20 13:00:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2022-03-20 13:00:00,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 93 [2022-03-20 13:00:00,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:00,014 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2022-03-20 13:00:00,014 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) [2022-03-20 13:00:00,014 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2022-03-20 13:00:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 13:00:00,014 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:00,014 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:00,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 13:00:00,215 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 [2022-03-20 13:00:00,215 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:00,215 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 73 times [2022-03-20 13:00:00,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:00,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [352955424] [2022-03-20 13:00:00,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:00,217 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:00,217 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:00,217 INFO L85 PathProgramCache]: Analyzing trace with hash -506845579, now seen corresponding path program 74 times [2022-03-20 13:00:00,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:00,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258101982] [2022-03-20 13:00:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:00,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:00,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:00,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258101982] [2022-03-20 13:00:00,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258101982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:00,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673656436] [2022-03-20 13:00:00,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:00,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:00,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:00,684 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) [2022-03-20 13:00:00,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 13:00:00,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 13:00:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:00,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1306 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673656436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:02,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:02,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39, 39] total 78 [2022-03-20 13:00:02,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [352955424] [2022-03-20 13:00:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [352955424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:02,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:02,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 13:00:02,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161279402] [2022-03-20 13:00:02,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:02,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 13:00:02,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 13:00:02,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:00:02,179 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) [2022-03-20 13:00:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:03,749 INFO L93 Difference]: Finished difference Result 292 states and 370 transitions. [2022-03-20 13:00:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 13:00:03,749 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 [2022-03-20 13:00:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:03,750 INFO L225 Difference]: With dead ends: 292 [2022-03-20 13:00:03,750 INFO L226 Difference]: Without dead ends: 275 [2022-03-20 13:00:03,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5778, Invalid=7332, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 13:00:03,767 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 727 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 13:00:03,768 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] [2022-03-20 13:00:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-20 13:00:03,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 98. [2022-03-20 13:00:03,801 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) [2022-03-20 13:00:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2022-03-20 13:00:03,801 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 95 [2022-03-20 13:00:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:03,802 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2022-03-20 13:00:03,802 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) [2022-03-20 13:00:03,802 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2022-03-20 13:00:03,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 13:00:03,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:03,802 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:03,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:04,015 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 [2022-03-20 13:00:04,015 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 75 times [2022-03-20 13:00:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:04,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113434931] [2022-03-20 13:00:04,017 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:04,017 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:04,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:04,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1932719251, now seen corresponding path program 76 times [2022-03-20 13:00:04,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:04,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640604696] [2022-03-20 13:00:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:04,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:04,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:04,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:04,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640604696] [2022-03-20 13:00:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640604696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:04,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382460345] [2022-03-20 13:00:04,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:04,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:04,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:04,483 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) [2022-03-20 13:00:04,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 13:00:04,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:04,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:04,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 13:00:04,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:06,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382460345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:06,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:06,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2022-03-20 13:00:06,034 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:06,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113434931] [2022-03-20 13:00:06,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113434931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:06,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:06,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 13:00:06,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864354681] [2022-03-20 13:00:06,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:06,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 13:00:06,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 13:00:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 13:00:06,035 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) [2022-03-20 13:00:07,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:07,726 INFO L93 Difference]: Finished difference Result 299 states and 379 transitions. [2022-03-20 13:00:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 13:00:07,727 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 [2022-03-20 13:00:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:07,728 INFO L225 Difference]: With dead ends: 299 [2022-03-20 13:00:07,728 INFO L226 Difference]: Without dead ends: 282 [2022-03-20 13:00:07,728 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6086, Invalid=7720, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 13:00:07,729 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 904 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 13:00:07,729 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] [2022-03-20 13:00:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-20 13:00:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 100. [2022-03-20 13:00:07,764 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) [2022-03-20 13:00:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-03-20 13:00:07,765 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 97 [2022-03-20 13:00:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:07,765 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-03-20 13:00:07,765 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) [2022-03-20 13:00:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-03-20 13:00:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:00:07,765 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:07,765 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:07,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:07,979 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 [2022-03-20 13:00:07,979 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:07,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 77 times [2022-03-20 13:00:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:07,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [776938501] [2022-03-20 13:00:07,981 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:07,981 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:07,981 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1302377265, now seen corresponding path program 78 times [2022-03-20 13:00:07,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:07,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138206064] [2022-03-20 13:00:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:08,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:08,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138206064] [2022-03-20 13:00:08,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138206064] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:08,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452687373] [2022-03-20 13:00:08,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:08,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:08,490 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) [2022-03-20 13:00:08,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 13:00:08,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:08,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 13:00:08,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1454 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1444 trivial. 0 not checked. [2022-03-20 13:00:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452687373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:08,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 7, 7] total 48 [2022-03-20 13:00:08,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:08,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [776938501] [2022-03-20 13:00:08,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [776938501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:08,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:08,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 13:00:08,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456275883] [2022-03-20 13:00:08,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:08,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 13:00:08,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:08,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 13:00:08,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:00:08,916 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) [2022-03-20 13:00:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:10,668 INFO L93 Difference]: Finished difference Result 306 states and 388 transitions. [2022-03-20 13:00:10,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 13:00:10,668 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 [2022-03-20 13:00:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:10,669 INFO L225 Difference]: With dead ends: 306 [2022-03-20 13:00:10,669 INFO L226 Difference]: Without dead ends: 289 [2022-03-20 13:00:10,670 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2752, Invalid=4730, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:00:10,670 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 841 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 13:00:10,670 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] [2022-03-20 13:00:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-20 13:00:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 102. [2022-03-20 13:00:10,706 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) [2022-03-20 13:00:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-03-20 13:00:10,706 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2022-03-20 13:00:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:10,706 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-03-20 13:00:10,706 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) [2022-03-20 13:00:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-03-20 13:00:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 13:00:10,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:10,707 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:10,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 13:00:10,907 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 [2022-03-20 13:00:10,908 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:10,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 79 times [2022-03-20 13:00:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:10,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543038974] [2022-03-20 13:00:10,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:10,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:10,909 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:10,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1134117455, now seen corresponding path program 80 times [2022-03-20 13:00:10,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:10,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978921275] [2022-03-20 13:00:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:10,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:11,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:11,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:11,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978921275] [2022-03-20 13:00:11,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978921275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:11,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234687551] [2022-03-20 13:00:11,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:11,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:11,436 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) [2022-03-20 13:00:11,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 13:00:11,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:11,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 13:00:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:11,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1531 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234687551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:13,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:13,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 84 [2022-03-20 13:00:13,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543038974] [2022-03-20 13:00:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543038974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:13,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:13,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 13:00:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928252478] [2022-03-20 13:00:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:13,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 13:00:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 13:00:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:00:13,200 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) [2022-03-20 13:00:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:15,165 INFO L93 Difference]: Finished difference Result 313 states and 397 transitions. [2022-03-20 13:00:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 13:00:15,165 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 [2022-03-20 13:00:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:15,166 INFO L225 Difference]: With dead ends: 313 [2022-03-20 13:00:15,166 INFO L226 Difference]: Without dead ends: 296 [2022-03-20 13:00:15,167 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6726, Invalid=8526, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 13:00:15,167 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 982 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-03-20 13:00:15,167 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] [2022-03-20 13:00:15,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-20 13:00:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 104. [2022-03-20 13:00:15,207 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) [2022-03-20 13:00:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-03-20 13:00:15,208 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2022-03-20 13:00:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:15,208 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-03-20 13:00:15,208 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) [2022-03-20 13:00:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-03-20 13:00:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 13:00:15,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:15,208 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:15,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:15,410 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 [2022-03-20 13:00:15,410 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 81 times [2022-03-20 13:00:15,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:15,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1902616064] [2022-03-20 13:00:15,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:15,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:15,413 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1649770003, now seen corresponding path program 82 times [2022-03-20 13:00:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:15,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642186338] [2022-03-20 13:00:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:15,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:15,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642186338] [2022-03-20 13:00:15,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642186338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:15,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438149758] [2022-03-20 13:00:15,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:15,988 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) [2022-03-20 13:00:15,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 13:00:16,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:16,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 13:00:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:16,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:17,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438149758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:17,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:17,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 86 [2022-03-20 13:00:17,808 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1902616064] [2022-03-20 13:00:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1902616064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:17,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:17,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 13:00:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134376835] [2022-03-20 13:00:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:17,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 13:00:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 13:00:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 13:00:17,810 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) [2022-03-20 13:00:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:19,889 INFO L93 Difference]: Finished difference Result 320 states and 406 transitions. [2022-03-20 13:00:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 13:00:19,889 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 [2022-03-20 13:00:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:19,890 INFO L225 Difference]: With dead ends: 320 [2022-03-20 13:00:19,890 INFO L226 Difference]: Without dead ends: 303 [2022-03-20 13:00:19,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7058, Invalid=8944, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 13:00:19,891 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:19,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 37 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-20 13:00:19,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 106. [2022-03-20 13:00:19,932 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) [2022-03-20 13:00:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-03-20 13:00:19,932 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2022-03-20 13:00:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:19,932 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-03-20 13:00:19,933 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) [2022-03-20 13:00:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-03-20 13:00:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:00:19,933 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:19,933 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:19,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:20,133 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 [2022-03-20 13:00:20,134 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:20,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 83 times [2022-03-20 13:00:20,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:20,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1790663798] [2022-03-20 13:00:20,136 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:20,136 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:20,136 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1200991733, now seen corresponding path program 84 times [2022-03-20 13:00:20,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:20,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488753683] [2022-03-20 13:00:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:20,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:20,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488753683] [2022-03-20 13:00:20,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488753683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:20,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870882579] [2022-03-20 13:00:20,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:20,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:20,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:20,733 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) [2022-03-20 13:00:20,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 13:00:20,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:20,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:20,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 13:00:21,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1691 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2022-03-20 13:00:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870882579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:21,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 7, 7] total 51 [2022-03-20 13:00:21,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:21,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1790663798] [2022-03-20 13:00:21,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1790663798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:21,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 13:00:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284584698] [2022-03-20 13:00:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:21,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 13:00:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 13:00:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:00:21,227 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) [2022-03-20 13:00:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:23,407 INFO L93 Difference]: Finished difference Result 327 states and 415 transitions. [2022-03-20 13:00:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 13:00:23,408 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 [2022-03-20 13:00:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:23,408 INFO L225 Difference]: With dead ends: 327 [2022-03-20 13:00:23,409 INFO L226 Difference]: Without dead ends: 310 [2022-03-20 13:00:23,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3151, Invalid=5405, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 13:00:23,409 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 [2022-03-20 13:00:23,409 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] [2022-03-20 13:00:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-20 13:00:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 108. [2022-03-20 13:00:23,451 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) [2022-03-20 13:00:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2022-03-20 13:00:23,451 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 105 [2022-03-20 13:00:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:23,452 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2022-03-20 13:00:23,452 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) [2022-03-20 13:00:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2022-03-20 13:00:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 13:00:23,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:23,452 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:23,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 13:00:23,653 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 [2022-03-20 13:00:23,653 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:23,653 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 85 times [2022-03-20 13:00:23,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:23,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [400431814] [2022-03-20 13:00:23,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:23,655 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:23,655 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:23,655 INFO L85 PathProgramCache]: Analyzing trace with hash 578196137, now seen corresponding path program 86 times [2022-03-20 13:00:23,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:23,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814258609] [2022-03-20 13:00:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:23,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:24,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:24,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:24,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814258609] [2022-03-20 13:00:24,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814258609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:24,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614951758] [2022-03-20 13:00:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:24,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:24,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:24,283 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) [2022-03-20 13:00:24,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 13:00:24,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:24,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-20 13:00:24,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614951758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:26,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 90 [2022-03-20 13:00:26,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [400431814] [2022-03-20 13:00:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [400431814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:26,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 13:00:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553894492] [2022-03-20 13:00:26,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:26,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 13:00:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 13:00:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:00:26,259 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) [2022-03-20 13:00:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:28,623 INFO L93 Difference]: Finished difference Result 334 states and 424 transitions. [2022-03-20 13:00:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 13:00:28,623 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 [2022-03-20 13:00:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:28,624 INFO L225 Difference]: With dead ends: 334 [2022-03-20 13:00:28,624 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 13:00:28,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7746, Invalid=9810, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 13:00:28,625 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:00:28,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 32 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:00:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 13:00:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 110. [2022-03-20 13:00:28,670 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) [2022-03-20 13:00:28,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-03-20 13:00:28,670 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2022-03-20 13:00:28,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:28,670 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-03-20 13:00:28,670 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) [2022-03-20 13:00:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-03-20 13:00:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 13:00:28,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:28,671 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:28,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:28,885 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 [2022-03-20 13:00:28,885 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:28,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:28,886 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 87 times [2022-03-20 13:00:28,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:28,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567221709] [2022-03-20 13:00:28,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:28,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:28,887 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:28,887 INFO L85 PathProgramCache]: Analyzing trace with hash 980755399, now seen corresponding path program 88 times [2022-03-20 13:00:28,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51624944] [2022-03-20 13:00:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:29,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51624944] [2022-03-20 13:00:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51624944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:29,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89075086] [2022-03-20 13:00:29,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:29,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:29,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:29,507 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) [2022-03-20 13:00:29,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 13:00:29,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:29,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 13:00:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:29,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89075086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:31,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:31,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 92 [2022-03-20 13:00:31,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:31,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1567221709] [2022-03-20 13:00:31,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1567221709] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:31,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:31,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 13:00:31,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41662028] [2022-03-20 13:00:31,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:31,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 13:00:31,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:31,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 13:00:31,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 13:00:31,541 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) [2022-03-20 13:00:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:34,141 INFO L93 Difference]: Finished difference Result 341 states and 433 transitions. [2022-03-20 13:00:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 13:00:34,142 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 [2022-03-20 13:00:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:34,143 INFO L225 Difference]: With dead ends: 341 [2022-03-20 13:00:34,143 INFO L226 Difference]: Without dead ends: 324 [2022-03-20 13:00:34,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8102, Invalid=10258, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 13:00:34,144 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 [2022-03-20 13:00:34,144 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] [2022-03-20 13:00:34,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-20 13:00:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 112. [2022-03-20 13:00:34,191 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) [2022-03-20 13:00:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-03-20 13:00:34,191 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 109 [2022-03-20 13:00:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:34,192 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-03-20 13:00:34,192 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) [2022-03-20 13:00:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-03-20 13:00:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:00:34,192 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:34,192 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:34,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:34,405 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 [2022-03-20 13:00:34,406 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 89 times [2022-03-20 13:00:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:34,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568407557] [2022-03-20 13:00:34,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:34,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:34,408 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1293149541, now seen corresponding path program 90 times [2022-03-20 13:00:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960339820] [2022-03-20 13:00:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:35,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:35,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960339820] [2022-03-20 13:00:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960339820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427021931] [2022-03-20 13:00:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:35,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:35,066 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) [2022-03-20 13:00:35,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 13:00:35,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:35,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 13:00:35,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-03-20 13:00:35,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427021931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:35,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:35,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 7, 7] total 54 [2022-03-20 13:00:35,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:35,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568407557] [2022-03-20 13:00:35,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568407557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:35,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:35,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 13:00:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893050315] [2022-03-20 13:00:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:35,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 13:00:35,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:35,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 13:00:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:00:35,577 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) [2022-03-20 13:00:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:38,271 INFO L93 Difference]: Finished difference Result 348 states and 442 transitions. [2022-03-20 13:00:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 13:00:38,271 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 [2022-03-20 13:00:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:38,272 INFO L225 Difference]: With dead ends: 348 [2022-03-20 13:00:38,272 INFO L226 Difference]: Without dead ends: 331 [2022-03-20 13:00:38,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3577, Invalid=6125, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:00:38,273 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 [2022-03-20 13:00:38,273 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] [2022-03-20 13:00:38,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-20 13:00:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 114. [2022-03-20 13:00:38,327 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) [2022-03-20 13:00:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2022-03-20 13:00:38,328 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2022-03-20 13:00:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:38,328 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2022-03-20 13:00:38,328 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) [2022-03-20 13:00:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2022-03-20 13:00:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 13:00:38,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:38,328 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:38,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:38,529 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 [2022-03-20 13:00:38,529 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 91 times [2022-03-20 13:00:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:38,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1320599046] [2022-03-20 13:00:38,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:38,531 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:38,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 856209283, now seen corresponding path program 92 times [2022-03-20 13:00:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277593676] [2022-03-20 13:00:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:39,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277593676] [2022-03-20 13:00:39,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277593676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339136704] [2022-03-20 13:00:39,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:39,255 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) [2022-03-20 13:00:39,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 13:00:39,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:39,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 13:00:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339136704] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:41,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:41,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 96 [2022-03-20 13:00:41,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:41,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1320599046] [2022-03-20 13:00:41,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1320599046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:41,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:41,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 13:00:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102114542] [2022-03-20 13:00:41,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:41,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 13:00:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 13:00:41,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 13:00:41,506 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) [2022-03-20 13:00:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:44,392 INFO L93 Difference]: Finished difference Result 355 states and 451 transitions. [2022-03-20 13:00:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 13:00:44,392 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 [2022-03-20 13:00:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:44,393 INFO L225 Difference]: With dead ends: 355 [2022-03-20 13:00:44,393 INFO L226 Difference]: Without dead ends: 338 [2022-03-20 13:00:44,394 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8838, Invalid=11184, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 13:00:44,394 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 [2022-03-20 13:00:44,394 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] [2022-03-20 13:00:44,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-03-20 13:00:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 116. [2022-03-20 13:00:44,451 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) [2022-03-20 13:00:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2022-03-20 13:00:44,452 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2022-03-20 13:00:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:44,452 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2022-03-20 13:00:44,452 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) [2022-03-20 13:00:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2022-03-20 13:00:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 13:00:44,452 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:44,452 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:44,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 13:00:44,667 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 [2022-03-20 13:00:44,667 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 93 times [2022-03-20 13:00:44,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075193421] [2022-03-20 13:00:44,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:44,669 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:44,669 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1863416353, now seen corresponding path program 94 times [2022-03-20 13:00:44,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:44,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131076153] [2022-03-20 13:00:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:44,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:45,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:45,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131076153] [2022-03-20 13:00:45,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131076153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099484821] [2022-03-20 13:00:45,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:00:45,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:45,367 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) [2022-03-20 13:00:45,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 13:00:45,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:00:45,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:45,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-20 13:00:45,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:45,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2126 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099484821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:47,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:47,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-03-20 13:00:47,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075193421] [2022-03-20 13:00:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075193421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:47,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:47,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 13:00:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432942026] [2022-03-20 13:00:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:47,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 13:00:47,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 13:00:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 13:00:47,667 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) [2022-03-20 13:00:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:50,739 INFO L93 Difference]: Finished difference Result 362 states and 460 transitions. [2022-03-20 13:00:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 13:00:50,740 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 [2022-03-20 13:00:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:50,741 INFO L225 Difference]: With dead ends: 362 [2022-03-20 13:00:50,741 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 13:00:50,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1356 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9218, Invalid=11662, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 13:00:50,742 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 [2022-03-20 13:00:50,742 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] [2022-03-20 13:00:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 13:00:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 118. [2022-03-20 13:00:50,795 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) [2022-03-20 13:00:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-03-20 13:00:50,795 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 115 [2022-03-20 13:00:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:50,796 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-03-20 13:00:50,796 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) [2022-03-20 13:00:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-03-20 13:00:50,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:00:50,796 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:50,796 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:50,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:51,009 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 [2022-03-20 13:00:51,009 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:51,010 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 95 times [2022-03-20 13:00:51,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:51,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646566979] [2022-03-20 13:00:51,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:51,011 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:51,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash -873198273, now seen corresponding path program 96 times [2022-03-20 13:00:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372985856] [2022-03-20 13:00:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:51,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:51,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:51,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:51,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372985856] [2022-03-20 13:00:51,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372985856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340008372] [2022-03-20 13:00:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:00:51,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:51,749 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) [2022-03-20 13:00:51,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 13:00:51,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:00:51,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:51,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:00:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 13:00:52,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2209 trivial. 0 not checked. [2022-03-20 13:00:52,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340008372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:52,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:52,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 7, 7] total 57 [2022-03-20 13:00:52,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:52,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646566979] [2022-03-20 13:00:52,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646566979] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:52,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:52,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 13:00:52,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177967383] [2022-03-20 13:00:52,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:52,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 13:00:52,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:52,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 13:00:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 13:00:52,277 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) [2022-03-20 13:00:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:00:55,430 INFO L93 Difference]: Finished difference Result 369 states and 469 transitions. [2022-03-20 13:00:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 13:00:55,430 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 [2022-03-20 13:00:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:00:55,431 INFO L225 Difference]: With dead ends: 369 [2022-03-20 13:00:55,431 INFO L226 Difference]: Without dead ends: 352 [2022-03-20 13:00:55,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4030, Invalid=6890, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 13:00:55,432 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1560 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-20 13:00:55,432 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] [2022-03-20 13:00:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-20 13:00:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 120. [2022-03-20 13:00:55,490 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) [2022-03-20 13:00:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2022-03-20 13:00:55,490 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 117 [2022-03-20 13:00:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:00:55,490 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2022-03-20 13:00:55,491 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) [2022-03-20 13:00:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2022-03-20 13:00:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 13:00:55,491 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:00:55,492 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:00:55,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 13:00:55,707 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 [2022-03-20 13:00:55,707 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:00:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:00:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 97 times [2022-03-20 13:00:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:55,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834914588] [2022-03-20 13:00:55,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:00:55,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:00:55,709 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:00:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2055098589, now seen corresponding path program 98 times [2022-03-20 13:00:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:00:55,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77106555] [2022-03-20 13:00:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:00:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:00:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:00:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:00:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:56,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:00:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77106555] [2022-03-20 13:00:56,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77106555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:00:56,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376043330] [2022-03-20 13:00:56,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:00:56,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:00:56,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:00:56,469 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) [2022-03-20 13:00:56,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 13:00:56,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:00:56,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:00:56,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 13:00:56,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:00:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:56,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:00:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:00:58,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376043330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:00:58,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:00:58,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-03-20 13:00:58,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:00:58,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834914588] [2022-03-20 13:00:58,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834914588] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:00:58,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:00:58,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 13:00:58,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350102425] [2022-03-20 13:00:58,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:00:58,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 13:00:58,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:00:58,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 13:00:58,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 13:00:58,974 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) [2022-03-20 13:01:02,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:02,371 INFO L93 Difference]: Finished difference Result 376 states and 478 transitions. [2022-03-20 13:01:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 13:01:02,371 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 [2022-03-20 13:01:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:02,372 INFO L225 Difference]: With dead ends: 376 [2022-03-20 13:01:02,372 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 13:01:02,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10002, Invalid=12648, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 13:01:02,373 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 [2022-03-20 13:01:02,373 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] [2022-03-20 13:01:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 13:01:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 122. [2022-03-20 13:01:02,431 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) [2022-03-20 13:01:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2022-03-20 13:01:02,431 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 119 [2022-03-20 13:01:02,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:02,431 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2022-03-20 13:01:02,432 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) [2022-03-20 13:01:02,432 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2022-03-20 13:01:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 13:01:02,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:02,432 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:02,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:02,647 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 [2022-03-20 13:01:02,647 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:02,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:02,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 99 times [2022-03-20 13:01:02,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52575951] [2022-03-20 13:01:02,649 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:02,649 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:02,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1350163205, now seen corresponding path program 100 times [2022-03-20 13:01:02,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:02,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527175463] [2022-03-20 13:01:02,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:02,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:03,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:03,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:03,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527175463] [2022-03-20 13:01:03,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527175463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:03,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153717966] [2022-03-20 13:01:03,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:03,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:03,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:03,410 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) [2022-03-20 13:01:03,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 13:01:03,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:03,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:03,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 13:01:03,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:03,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2411 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:05,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153717966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:05,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:05,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 104 [2022-03-20 13:01:05,966 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52575951] [2022-03-20 13:01:05,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52575951] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:05,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:05,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 13:01:05,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007956409] [2022-03-20 13:01:05,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:05,967 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 13:01:05,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:05,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 13:01:05,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 13:01:05,969 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) [2022-03-20 13:01:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:09,528 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2022-03-20 13:01:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 13:01:09,528 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 [2022-03-20 13:01:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:09,529 INFO L225 Difference]: With dead ends: 383 [2022-03-20 13:01:09,529 INFO L226 Difference]: Without dead ends: 366 [2022-03-20 13:01:09,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10406, Invalid=13156, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 13:01:09,530 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 [2022-03-20 13:01:09,530 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] [2022-03-20 13:01:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-20 13:01:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 124. [2022-03-20 13:01:09,590 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) [2022-03-20 13:01:09,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2022-03-20 13:01:09,591 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2022-03-20 13:01:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:09,591 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2022-03-20 13:01:09,591 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) [2022-03-20 13:01:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2022-03-20 13:01:09,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 13:01:09,591 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:09,591 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:09,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 13:01:09,795 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 [2022-03-20 13:01:09,796 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:09,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 101 times [2022-03-20 13:01:09,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:09,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913669110] [2022-03-20 13:01:09,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:09,799 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:09,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1041667687, now seen corresponding path program 102 times [2022-03-20 13:01:09,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:09,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27510691] [2022-03-20 13:01:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:09,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:10,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:10,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27510691] [2022-03-20 13:01:10,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27510691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:10,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784419708] [2022-03-20 13:01:10,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:10,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:10,617 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) [2022-03-20 13:01:10,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 13:01:10,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 13:01:11,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2510 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-03-20 13:01:11,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784419708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:11,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:11,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 7, 7] total 60 [2022-03-20 13:01:11,208 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913669110] [2022-03-20 13:01:11,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913669110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:11,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:11,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 13:01:11,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000525545] [2022-03-20 13:01:11,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:11,209 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 13:01:11,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 13:01:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 13:01:11,210 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) [2022-03-20 13:01:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:14,811 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2022-03-20 13:01:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 13:01:14,812 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 [2022-03-20 13:01:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:14,813 INFO L225 Difference]: With dead ends: 390 [2022-03-20 13:01:14,813 INFO L226 Difference]: Without dead ends: 373 [2022-03-20 13:01:14,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4510, Invalid=7700, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 13:01:14,814 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1435 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-20 13:01:14,814 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] [2022-03-20 13:01:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-20 13:01:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 126. [2022-03-20 13:01:14,876 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) [2022-03-20 13:01:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2022-03-20 13:01:14,876 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2022-03-20 13:01:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:14,876 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2022-03-20 13:01:14,876 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) [2022-03-20 13:01:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2022-03-20 13:01:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 13:01:14,877 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:14,877 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:14,894 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-20 13:01:15,077 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 [2022-03-20 13:01:15,077 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:15,078 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 103 times [2022-03-20 13:01:15,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:15,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [128234289] [2022-03-20 13:01:15,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:15,079 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:15,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:15,079 INFO L85 PathProgramCache]: Analyzing trace with hash -930218313, now seen corresponding path program 104 times [2022-03-20 13:01:15,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:15,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747080173] [2022-03-20 13:01:15,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:15,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:15,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:15,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:15,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:15,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747080173] [2022-03-20 13:01:15,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747080173] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:15,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978373753] [2022-03-20 13:01:15,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:15,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:15,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:15,912 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) [2022-03-20 13:01:15,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 13:01:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:16,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 13:01:16,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978373753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:18,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 108 [2022-03-20 13:01:18,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:18,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [128234289] [2022-03-20 13:01:18,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [128234289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:18,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:18,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 13:01:18,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403765488] [2022-03-20 13:01:18,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:18,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 13:01:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:18,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 13:01:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 13:01:18,672 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) [2022-03-20 13:01:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:22,550 INFO L93 Difference]: Finished difference Result 397 states and 505 transitions. [2022-03-20 13:01:22,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 13:01:22,550 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 [2022-03-20 13:01:22,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:22,551 INFO L225 Difference]: With dead ends: 397 [2022-03-20 13:01:22,551 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 13:01:22,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=11238, Invalid=14202, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 13:01:22,552 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 [2022-03-20 13:01:22,553 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] [2022-03-20 13:01:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 13:01:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 128. [2022-03-20 13:01:22,618 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) [2022-03-20 13:01:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-03-20 13:01:22,618 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2022-03-20 13:01:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:22,619 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-03-20 13:01:22,619 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) [2022-03-20 13:01:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-03-20 13:01:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:01:22,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:22,619 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:22,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 13:01:22,820 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 [2022-03-20 13:01:22,820 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 105 times [2022-03-20 13:01:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1137174545] [2022-03-20 13:01:22,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:22,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:22,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1201552299, now seen corresponding path program 106 times [2022-03-20 13:01:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:22,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537086955] [2022-03-20 13:01:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:22,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:23,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:23,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537086955] [2022-03-20 13:01:23,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537086955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:23,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508715506] [2022-03-20 13:01:23,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:23,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:23,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:23,708 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) [2022-03-20 13:01:23,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 13:01:23,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:23,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-20 13:01:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2714 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:26,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508715506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:26,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:26,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55, 55] total 110 [2022-03-20 13:01:26,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1137174545] [2022-03-20 13:01:26,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1137174545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:26,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:26,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 13:01:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72035533] [2022-03-20 13:01:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:26,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 13:01:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 13:01:26,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 13:01:26,534 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) [2022-03-20 13:01:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:30,659 INFO L93 Difference]: Finished difference Result 404 states and 514 transitions. [2022-03-20 13:01:30,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 13:01:30,660 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 [2022-03-20 13:01:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:30,661 INFO L225 Difference]: With dead ends: 404 [2022-03-20 13:01:30,661 INFO L226 Difference]: Without dead ends: 387 [2022-03-20 13:01:30,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11666, Invalid=14740, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 13:01:30,662 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1301 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-03-20 13:01:30,662 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] [2022-03-20 13:01:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-20 13:01:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 130. [2022-03-20 13:01:30,737 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) [2022-03-20 13:01:30,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2022-03-20 13:01:30,737 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2022-03-20 13:01:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:30,738 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2022-03-20 13:01:30,738 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) [2022-03-20 13:01:30,738 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2022-03-20 13:01:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 13:01:30,738 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:30,738 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:30,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 13:01:30,938 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 [2022-03-20 13:01:30,939 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:30,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:30,939 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 107 times [2022-03-20 13:01:30,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:30,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2025021218] [2022-03-20 13:01:30,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:30,940 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:30,940 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:30,940 INFO L85 PathProgramCache]: Analyzing trace with hash 39492211, now seen corresponding path program 108 times [2022-03-20 13:01:30,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:30,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605177290] [2022-03-20 13:01:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:30,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:31,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605177290] [2022-03-20 13:01:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605177290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822929606] [2022-03-20 13:01:31,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:31,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:31,837 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) [2022-03-20 13:01:31,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 13:01:32,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:32,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 13:01:32,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2809 trivial. 0 not checked. [2022-03-20 13:01:32,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822929606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:32,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:32,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 7, 7] total 63 [2022-03-20 13:01:32,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:32,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2025021218] [2022-03-20 13:01:32,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2025021218] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:32,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:32,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 13:01:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179858840] [2022-03-20 13:01:32,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:32,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 13:01:32,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 13:01:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:01:32,446 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) [2022-03-20 13:01:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:36,754 INFO L93 Difference]: Finished difference Result 411 states and 523 transitions. [2022-03-20 13:01:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 13:01:36,754 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 [2022-03-20 13:01:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:36,756 INFO L225 Difference]: With dead ends: 411 [2022-03-20 13:01:36,756 INFO L226 Difference]: Without dead ends: 394 [2022-03-20 13:01:36,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1811 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5017, Invalid=8555, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 13:01:36,756 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 [2022-03-20 13:01:36,757 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] [2022-03-20 13:01:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-03-20 13:01:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 132. [2022-03-20 13:01:36,829 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) [2022-03-20 13:01:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2022-03-20 13:01:36,829 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2022-03-20 13:01:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:36,829 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2022-03-20 13:01:36,829 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) [2022-03-20 13:01:36,829 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2022-03-20 13:01:36,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 13:01:36,830 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:36,830 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:36,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 13:01:37,030 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 [2022-03-20 13:01:37,030 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 109 times [2022-03-20 13:01:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:37,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1484759183] [2022-03-20 13:01:37,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:37,032 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:37,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1317641967, now seen corresponding path program 110 times [2022-03-20 13:01:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372088322] [2022-03-20 13:01:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:37,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:37,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:37,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372088322] [2022-03-20 13:01:37,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372088322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:37,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510646673] [2022-03-20 13:01:37,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:01:37,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:37,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:37,947 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) [2022-03-20 13:01:37,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 13:01:38,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:01:38,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 13:01:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:38,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:40,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510646673] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:40,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:40,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57, 57] total 114 [2022-03-20 13:01:40,941 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:40,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1484759183] [2022-03-20 13:01:40,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1484759183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:40,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:40,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 13:01:40,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885750112] [2022-03-20 13:01:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:40,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 13:01:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:40,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 13:01:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 13:01:40,943 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) [2022-03-20 13:01:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:45,539 INFO L93 Difference]: Finished difference Result 418 states and 532 transitions. [2022-03-20 13:01:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 13:01:45,539 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 [2022-03-20 13:01:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:45,540 INFO L225 Difference]: With dead ends: 418 [2022-03-20 13:01:45,540 INFO L226 Difference]: Without dead ends: 401 [2022-03-20 13:01:45,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12546, Invalid=15846, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 13:01:45,541 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1614 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:45,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1614 Valid, 27 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:01:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-03-20 13:01:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 134. [2022-03-20 13:01:45,617 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) [2022-03-20 13:01:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-03-20 13:01:45,617 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 131 [2022-03-20 13:01:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:45,617 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-03-20 13:01:45,617 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) [2022-03-20 13:01:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-03-20 13:01:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 13:01:45,618 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:45,618 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:45,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 13:01:45,818 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 [2022-03-20 13:01:45,818 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 111 times [2022-03-20 13:01:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022931712] [2022-03-20 13:01:45,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:45,820 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:45,820 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 146470959, now seen corresponding path program 112 times [2022-03-20 13:01:45,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571480823] [2022-03-20 13:01:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:45,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:46,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:46,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571480823] [2022-03-20 13:01:46,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571480823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:46,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509932257] [2022-03-20 13:01:46,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:01:46,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:46,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:46,751 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) [2022-03-20 13:01:46,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 13:01:47,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:01:47,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:47,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 13:01:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3035 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509932257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:49,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:49,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 116 [2022-03-20 13:01:49,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022931712] [2022-03-20 13:01:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022931712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:49,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:49,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 13:01:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581477167] [2022-03-20 13:01:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:49,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 13:01:49,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 13:01:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 13:01:49,860 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) [2022-03-20 13:01:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:01:54,798 INFO L93 Difference]: Finished difference Result 425 states and 541 transitions. [2022-03-20 13:01:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 13:01:54,798 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 [2022-03-20 13:01:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:01:54,799 INFO L225 Difference]: With dead ends: 425 [2022-03-20 13:01:54,799 INFO L226 Difference]: Without dead ends: 408 [2022-03-20 13:01:54,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12998, Invalid=16414, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 13:01:54,801 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1328 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:01:54,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1328 Valid, 37 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:01:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-20 13:01:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 136. [2022-03-20 13:01:54,879 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) [2022-03-20 13:01:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2022-03-20 13:01:54,880 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2022-03-20 13:01:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:01:54,880 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2022-03-20 13:01:54,880 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) [2022-03-20 13:01:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2022-03-20 13:01:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 13:01:54,880 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:01:54,880 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:01:54,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-20 13:01:55,083 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 [2022-03-20 13:01:55,089 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:01:55,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:01:55,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 113 times [2022-03-20 13:01:55,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:55,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890075459] [2022-03-20 13:01:55,090 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:01:55,090 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:01:55,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:01:55,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1590280243, now seen corresponding path program 114 times [2022-03-20 13:01:55,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:01:55,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726236550] [2022-03-20 13:01:55,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:01:55,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:01:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:56,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:01:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:01:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:01:56,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:01:56,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726236550] [2022-03-20 13:01:56,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726236550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:01:56,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375256211] [2022-03-20 13:01:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:01:56,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:01:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:01:56,038 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) [2022-03-20 13:01:56,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 13:01:56,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:01:56,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:01:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:01:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:01:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 13:01:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:01:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3146 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2022-03-20 13:01:56,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375256211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:01:56,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:01:56,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 7, 7] total 66 [2022-03-20 13:01:56,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:01:56,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890075459] [2022-03-20 13:01:56,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890075459] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:01:56,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:01:56,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 13:01:56,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219112286] [2022-03-20 13:01:56,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:01:56,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 13:01:56,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:01:56,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 13:01:56,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 13:01:56,678 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) [2022-03-20 13:02:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:01,568 INFO L93 Difference]: Finished difference Result 432 states and 550 transitions. [2022-03-20 13:02:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 13:02:01,568 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 [2022-03-20 13:02:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:01,569 INFO L225 Difference]: With dead ends: 432 [2022-03-20 13:02:01,569 INFO L226 Difference]: Without dead ends: 415 [2022-03-20 13:02:01,570 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1997 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5551, Invalid=9455, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 13:02:01,570 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:01,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 47 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:01,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-03-20 13:02:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 138. [2022-03-20 13:02:01,656 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) [2022-03-20 13:02:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-03-20 13:02:01,657 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2022-03-20 13:02:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:01,657 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-03-20 13:02:01,657 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) [2022-03-20 13:02:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-03-20 13:02:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 13:02:01,657 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:01,658 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:01,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-20 13:02:01,858 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 [2022-03-20 13:02:01,858 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:01,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 115 times [2022-03-20 13:02:01,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:01,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1020978540] [2022-03-20 13:02:01,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:01,859 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:01,859 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 134092779, now seen corresponding path program 116 times [2022-03-20 13:02:01,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:01,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706653911] [2022-03-20 13:02:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:01,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:02,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706653911] [2022-03-20 13:02:02,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706653911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:02,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150241243] [2022-03-20 13:02:02,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:02,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:02,834 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) [2022-03-20 13:02:02,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 13:02:03,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 13:02:03,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3259 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150241243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:06,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 120 [2022-03-20 13:02:06,125 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1020978540] [2022-03-20 13:02:06,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1020978540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:06,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:06,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 13:02:06,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848150330] [2022-03-20 13:02:06,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:06,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 13:02:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:06,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 13:02:06,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 13:02:06,127 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) [2022-03-20 13:02:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:11,433 INFO L93 Difference]: Finished difference Result 439 states and 559 transitions. [2022-03-20 13:02:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 13:02:11,434 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 [2022-03-20 13:02:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:11,436 INFO L225 Difference]: With dead ends: 439 [2022-03-20 13:02:11,436 INFO L226 Difference]: Without dead ends: 422 [2022-03-20 13:02:11,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13926, Invalid=17580, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 13:02:11,437 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1574 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:11,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1574 Valid, 22 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-20 13:02:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 140. [2022-03-20 13:02:11,527 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) [2022-03-20 13:02:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-03-20 13:02:11,527 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2022-03-20 13:02:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:11,528 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-03-20 13:02:11,528 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) [2022-03-20 13:02:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-03-20 13:02:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 13:02:11,528 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:11,528 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:11,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:11,728 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 [2022-03-20 13:02:11,729 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 117 times [2022-03-20 13:02:11,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [446737617] [2022-03-20 13:02:11,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:11,730 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:11,730 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -600809335, now seen corresponding path program 118 times [2022-03-20 13:02:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:11,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678233455] [2022-03-20 13:02:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:12,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678233455] [2022-03-20 13:02:12,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678233455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:12,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901730857] [2022-03-20 13:02:12,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:12,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:12,752 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) [2022-03-20 13:02:12,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 13:02:13,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:13,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-20 13:02:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3374 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901730857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:16,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61, 61] total 122 [2022-03-20 13:02:16,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:16,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [446737617] [2022-03-20 13:02:16,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [446737617] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:16,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:16,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 13:02:16,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275536642] [2022-03-20 13:02:16,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:16,135 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 13:02:16,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 13:02:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 13:02:16,137 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) [2022-03-20 13:02:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:21,750 INFO L93 Difference]: Finished difference Result 446 states and 568 transitions. [2022-03-20 13:02:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 13:02:21,750 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 [2022-03-20 13:02:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:21,752 INFO L225 Difference]: With dead ends: 446 [2022-03-20 13:02:21,752 INFO L226 Difference]: Without dead ends: 429 [2022-03-20 13:02:21,753 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=14402, Invalid=18178, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 13:02:21,753 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:21,753 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 42 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-20 13:02:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 142. [2022-03-20 13:02:21,842 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) [2022-03-20 13:02:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2022-03-20 13:02:21,842 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2022-03-20 13:02:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:21,842 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2022-03-20 13:02:21,842 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) [2022-03-20 13:02:21,842 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2022-03-20 13:02:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 13:02:21,843 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:21,843 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:21,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 13:02:22,043 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 [2022-03-20 13:02:22,043 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 119 times [2022-03-20 13:02:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655933191] [2022-03-20 13:02:22,045 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:22,045 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:22,045 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1827862951, now seen corresponding path program 120 times [2022-03-20 13:02:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:22,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913905177] [2022-03-20 13:02:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:23,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:23,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913905177] [2022-03-20 13:02:23,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913905177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:23,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696949915] [2022-03-20 13:02:23,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:23,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:23,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:23,101 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) [2022-03-20 13:02:23,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 13:02:23,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:02:23,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:02:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 13:02:23,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3491 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3481 trivial. 0 not checked. [2022-03-20 13:02:23,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696949915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:23,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:23,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 7, 7] total 69 [2022-03-20 13:02:23,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:23,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655933191] [2022-03-20 13:02:23,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655933191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:23,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:23,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 13:02:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494757261] [2022-03-20 13:02:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:23,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 13:02:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 13:02:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:02:23,790 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) [2022-03-20 13:02:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:29,481 INFO L93 Difference]: Finished difference Result 453 states and 577 transitions. [2022-03-20 13:02:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 13:02:29,481 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 [2022-03-20 13:02:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:29,483 INFO L225 Difference]: With dead ends: 453 [2022-03-20 13:02:29,483 INFO L226 Difference]: Without dead ends: 436 [2022-03-20 13:02:29,483 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6112, Invalid=10400, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 13:02:29,484 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:29,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1884 Valid, 37 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-03-20 13:02:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 144. [2022-03-20 13:02:29,575 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) [2022-03-20 13:02:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2022-03-20 13:02:29,576 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 141 [2022-03-20 13:02:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:29,576 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2022-03-20 13:02:29,576 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) [2022-03-20 13:02:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2022-03-20 13:02:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 13:02:29,577 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:29,577 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:29,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 13:02:29,781 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 [2022-03-20 13:02:29,782 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:29,782 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 121 times [2022-03-20 13:02:29,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:29,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1645833075] [2022-03-20 13:02:29,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:29,783 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:29,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:29,783 INFO L85 PathProgramCache]: Analyzing trace with hash -680279227, now seen corresponding path program 122 times [2022-03-20 13:02:29,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:29,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960626455] [2022-03-20 13:02:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:29,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:30,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:30,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:30,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960626455] [2022-03-20 13:02:30,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960626455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:30,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438237741] [2022-03-20 13:02:30,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:02:30,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:30,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:30,903 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) [2022-03-20 13:02:30,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 13:02:31,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:02:31,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-20 13:02:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:31,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3610 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:34,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438237741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:34,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63, 63] total 126 [2022-03-20 13:02:34,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:34,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1645833075] [2022-03-20 13:02:34,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1645833075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:34,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 13:02:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644639481] [2022-03-20 13:02:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:34,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 13:02:34,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 13:02:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 13:02:34,512 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) [2022-03-20 13:02:40,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:40,766 INFO L93 Difference]: Finished difference Result 460 states and 586 transitions. [2022-03-20 13:02:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 13:02:40,766 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 [2022-03-20 13:02:40,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:40,768 INFO L225 Difference]: With dead ends: 460 [2022-03-20 13:02:40,768 INFO L226 Difference]: Without dead ends: 443 [2022-03-20 13:02:40,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=15378, Invalid=19404, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 13:02:40,769 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:02:40,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 52 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:02:40,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-20 13:02:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 146. [2022-03-20 13:02:40,866 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) [2022-03-20 13:02:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2022-03-20 13:02:40,866 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 143 [2022-03-20 13:02:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:40,866 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2022-03-20 13:02:40,867 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) [2022-03-20 13:02:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2022-03-20 13:02:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 13:02:40,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:40,867 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:40,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:41,067 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 [2022-03-20 13:02:41,068 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:41,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 123 times [2022-03-20 13:02:41,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:41,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [629872078] [2022-03-20 13:02:41,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:41,069 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:41,069 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:41,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1528259229, now seen corresponding path program 124 times [2022-03-20 13:02:41,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:41,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134680979] [2022-03-20 13:02:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:41,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:42,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:42,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134680979] [2022-03-20 13:02:42,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134680979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351012323] [2022-03-20 13:02:42,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:02:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:42,201 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) [2022-03-20 13:02:42,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 13:02:42,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:02:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:42,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 13:02:42,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:42,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3731 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:45,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351012323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:45,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:45,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 128 [2022-03-20 13:02:45,947 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [629872078] [2022-03-20 13:02:45,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [629872078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:45,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:45,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 13:02:45,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716942600] [2022-03-20 13:02:45,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:45,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 13:02:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 13:02:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 13:02:45,949 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) [2022-03-20 13:02:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:02:52,491 INFO L93 Difference]: Finished difference Result 467 states and 595 transitions. [2022-03-20 13:02:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 13:02:52,492 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 [2022-03-20 13:02:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:02:52,493 INFO L225 Difference]: With dead ends: 467 [2022-03-20 13:02:52,493 INFO L226 Difference]: Without dead ends: 450 [2022-03-20 13:02:52,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=15878, Invalid=20032, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 13:02:52,494 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1882 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-03-20 13:02:52,494 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] [2022-03-20 13:02:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-03-20 13:02:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 148. [2022-03-20 13:02:52,593 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) [2022-03-20 13:02:52,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-03-20 13:02:52,594 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2022-03-20 13:02:52,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:02:52,594 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-03-20 13:02:52,594 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) [2022-03-20 13:02:52,594 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-03-20 13:02:52,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 13:02:52,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:02:52,595 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:02:52,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 13:02:52,798 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 [2022-03-20 13:02:52,798 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:02:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:02:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 125 times [2022-03-20 13:02:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:52,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972958638] [2022-03-20 13:02:52,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:02:52,799 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:02:52,800 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:02:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash -393254911, now seen corresponding path program 126 times [2022-03-20 13:02:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:02:52,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896972015] [2022-03-20 13:02:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:02:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:02:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:02:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:02:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:02:53,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:02:53,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896972015] [2022-03-20 13:02:53,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896972015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:02:53,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559585329] [2022-03-20 13:02:53,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:02:53,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:02:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:02:53,944 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) [2022-03-20 13:02:53,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 13:02:54,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:02:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:02:54,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:02:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:02:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 13:02:54,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:02:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3854 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-03-20 13:02:54,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559585329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:02:54,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:02:54,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 7, 7] total 72 [2022-03-20 13:02:54,678 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:02:54,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972958638] [2022-03-20 13:02:54,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972958638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:02:54,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:02:54,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 13:02:54,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443157729] [2022-03-20 13:02:54,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:02:54,679 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 13:02:54,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:02:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 13:02:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:02:54,680 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) [2022-03-20 13:03:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:01,311 INFO L93 Difference]: Finished difference Result 474 states and 604 transitions. [2022-03-20 13:03:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 13:03:01,312 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 [2022-03-20 13:03:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:01,313 INFO L225 Difference]: With dead ends: 474 [2022-03-20 13:03:01,313 INFO L226 Difference]: Without dead ends: 457 [2022-03-20 13:03:01,314 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6700, Invalid=11390, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 13:03:01,314 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 [2022-03-20 13:03:01,314 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] [2022-03-20 13:03:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-03-20 13:03:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 150. [2022-03-20 13:03:01,431 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) [2022-03-20 13:03:01,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2022-03-20 13:03:01,431 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2022-03-20 13:03:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:01,432 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2022-03-20 13:03:01,432 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) [2022-03-20 13:03:01,432 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2022-03-20 13:03:01,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 13:03:01,432 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:01,432 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:01,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:01,651 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 [2022-03-20 13:03:01,651 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:01,651 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 127 times [2022-03-20 13:03:01,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741802601] [2022-03-20 13:03:01,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:01,652 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:01,652 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -575798497, now seen corresponding path program 128 times [2022-03-20 13:03:01,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:01,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552243286] [2022-03-20 13:03:01,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:01,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:02,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:02,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552243286] [2022-03-20 13:03:02,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552243286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:02,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560917204] [2022-03-20 13:03:02,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:02,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:02,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:02,832 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) [2022-03-20 13:03:02,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 13:03:03,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:03,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 13:03:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:03,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3979 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:06,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560917204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:06,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:06,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 132 [2022-03-20 13:03:06,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:06,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741802601] [2022-03-20 13:03:06,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741802601] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:06,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:06,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 13:03:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673294720] [2022-03-20 13:03:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:06,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 13:03:06,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 13:03:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 13:03:06,806 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) [2022-03-20 13:03:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:14,034 INFO L93 Difference]: Finished difference Result 481 states and 613 transitions. [2022-03-20 13:03:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 13:03:14,035 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 [2022-03-20 13:03:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:14,036 INFO L225 Difference]: With dead ends: 481 [2022-03-20 13:03:14,036 INFO L226 Difference]: Without dead ends: 464 [2022-03-20 13:03:14,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=16902, Invalid=21318, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 13:03:14,037 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1568 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:03:14,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 52 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:03:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-20 13:03:14,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 152. [2022-03-20 13:03:14,143 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) [2022-03-20 13:03:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2022-03-20 13:03:14,144 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2022-03-20 13:03:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:14,144 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2022-03-20 13:03:14,144 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) [2022-03-20 13:03:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2022-03-20 13:03:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 13:03:14,144 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:14,145 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:14,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:14,359 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 [2022-03-20 13:03:14,359 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:14,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 129 times [2022-03-20 13:03:14,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:14,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955498351] [2022-03-20 13:03:14,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:14,361 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:14,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:14,361 INFO L85 PathProgramCache]: Analyzing trace with hash 93474493, now seen corresponding path program 130 times [2022-03-20 13:03:14,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:14,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300572411] [2022-03-20 13:03:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:15,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:15,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300572411] [2022-03-20 13:03:15,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300572411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857594893] [2022-03-20 13:03:15,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:15,588 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) [2022-03-20 13:03:15,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 13:03:15,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-20 13:03:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:16,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4106 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:19,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857594893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:19,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:19,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-03-20 13:03:19,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955498351] [2022-03-20 13:03:19,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955498351] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:19,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:19,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 13:03:19,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294972978] [2022-03-20 13:03:19,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:19,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 13:03:19,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:19,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 13:03:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 13:03:19,711 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) [2022-03-20 13:03:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:27,307 INFO L93 Difference]: Finished difference Result 488 states and 622 transitions. [2022-03-20 13:03:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 13:03:27,307 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 [2022-03-20 13:03:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:27,308 INFO L225 Difference]: With dead ends: 488 [2022-03-20 13:03:27,308 INFO L226 Difference]: Without dead ends: 471 [2022-03-20 13:03:27,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=17426, Invalid=21976, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 13:03:27,310 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 [2022-03-20 13:03:27,310 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] [2022-03-20 13:03:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-03-20 13:03:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 154. [2022-03-20 13:03:27,426 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) [2022-03-20 13:03:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2022-03-20 13:03:27,426 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2022-03-20 13:03:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:27,427 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2022-03-20 13:03:27,427 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) [2022-03-20 13:03:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2022-03-20 13:03:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 13:03:27,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:27,427 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:27,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 13:03:27,628 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 [2022-03-20 13:03:27,628 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:27,628 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 131 times [2022-03-20 13:03:27,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:27,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336615384] [2022-03-20 13:03:27,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:27,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:27,629 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -980276517, now seen corresponding path program 132 times [2022-03-20 13:03:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:27,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198854324] [2022-03-20 13:03:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:28,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198854324] [2022-03-20 13:03:28,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198854324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896690457] [2022-03-20 13:03:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:03:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:28,875 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) [2022-03-20 13:03:28,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 13:03:29,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:03:29,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:03:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 13:03:29,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2022-03-20 13:03:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896690457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:29,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 75 [2022-03-20 13:03:29,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:29,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336615384] [2022-03-20 13:03:29,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336615384] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:29,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 13:03:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032018563] [2022-03-20 13:03:29,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:29,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 13:03:29,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 13:03:29,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 13:03:29,683 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) [2022-03-20 13:03:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:37,258 INFO L93 Difference]: Finished difference Result 495 states and 631 transitions. [2022-03-20 13:03:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 13:03:37,258 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 [2022-03-20 13:03:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:37,260 INFO L225 Difference]: With dead ends: 495 [2022-03-20 13:03:37,260 INFO L226 Difference]: Without dead ends: 478 [2022-03-20 13:03:37,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2609 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7315, Invalid=12425, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 13:03:37,261 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 [2022-03-20 13:03:37,261 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] [2022-03-20 13:03:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-20 13:03:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 156. [2022-03-20 13:03:37,376 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) [2022-03-20 13:03:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2022-03-20 13:03:37,376 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2022-03-20 13:03:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:37,376 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2022-03-20 13:03:37,376 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) [2022-03-20 13:03:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2022-03-20 13:03:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 13:03:37,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:37,377 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:37,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-20 13:03:37,583 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 [2022-03-20 13:03:37,583 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:37,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 133 times [2022-03-20 13:03:37,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:37,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172466615] [2022-03-20 13:03:37,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:37,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:37,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:37,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2062846087, now seen corresponding path program 134 times [2022-03-20 13:03:37,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:37,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904621868] [2022-03-20 13:03:37,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:37,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:38,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:38,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904621868] [2022-03-20 13:03:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904621868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494579338] [2022-03-20 13:03:38,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:03:38,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:38,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:38,872 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) [2022-03-20 13:03:38,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 13:03:39,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:03:39,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:39,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-20 13:03:39,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:39,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4366 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:43,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494579338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:43,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:43,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-20 13:03:43,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:43,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [172466615] [2022-03-20 13:03:43,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [172466615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:43,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:43,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 13:03:43,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645620559] [2022-03-20 13:03:43,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:43,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 13:03:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:43,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 13:03:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 13:03:43,151 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) [2022-03-20 13:03:51,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:03:51,388 INFO L93 Difference]: Finished difference Result 502 states and 640 transitions. [2022-03-20 13:03:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 13:03:51,388 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 [2022-03-20 13:03:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:03:51,390 INFO L225 Difference]: With dead ends: 502 [2022-03-20 13:03:51,390 INFO L226 Difference]: Without dead ends: 485 [2022-03-20 13:03:51,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=18498, Invalid=23322, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 13:03:51,391 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 [2022-03-20 13:03:51,391 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] [2022-03-20 13:03:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-03-20 13:03:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 158. [2022-03-20 13:03:51,511 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) [2022-03-20 13:03:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-03-20 13:03:51,511 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 155 [2022-03-20 13:03:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:03:51,511 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-03-20 13:03:51,511 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) [2022-03-20 13:03:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-03-20 13:03:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 13:03:51,512 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:03:51,512 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:03:51,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 13:03:51,712 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 [2022-03-20 13:03:51,712 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:03:51,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:03:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 135 times [2022-03-20 13:03:51,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1379371492] [2022-03-20 13:03:51,714 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:03:51,714 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:03:51,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:03:51,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1264850071, now seen corresponding path program 136 times [2022-03-20 13:03:51,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:03:51,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003456588] [2022-03-20 13:03:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:03:51,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:03:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:03:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:03:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:53,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:03:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003456588] [2022-03-20 13:03:53,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003456588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:03:53,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999085465] [2022-03-20 13:03:53,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:03:53,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:03:53,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:03:53,035 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) [2022-03-20 13:03:53,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 13:03:53,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:03:53,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:03:53,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 13:03:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:03:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:53,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:03:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4499 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:03:57,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999085465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:03:57,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:03:57,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 13:03:57,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:03:57,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1379371492] [2022-03-20 13:03:57,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1379371492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:03:57,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:03:57,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 13:03:57,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666199304] [2022-03-20 13:03:57,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:03:57,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 13:03:57,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:03:57,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 13:03:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 13:03:57,417 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) [2022-03-20 13:04:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:06,071 INFO L93 Difference]: Finished difference Result 509 states and 649 transitions. [2022-03-20 13:04:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 13:04:06,071 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 [2022-03-20 13:04:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:06,073 INFO L225 Difference]: With dead ends: 509 [2022-03-20 13:04:06,073 INFO L226 Difference]: Without dead ends: 492 [2022-03-20 13:04:06,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2679 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=19046, Invalid=24010, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 13:04:06,074 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1556 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:06,075 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1556 Valid, 47 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:04:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-20 13:04:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 160. [2022-03-20 13:04:06,208 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) [2022-03-20 13:04:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2022-03-20 13:04:06,208 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 157 [2022-03-20 13:04:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:06,208 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2022-03-20 13:04:06,208 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) [2022-03-20 13:04:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2022-03-20 13:04:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 13:04:06,209 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:06,209 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:06,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:06,409 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 [2022-03-20 13:04:06,409 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:06,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 137 times [2022-03-20 13:04:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845209560] [2022-03-20 13:04:06,411 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:06,411 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:06,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:06,411 INFO L85 PathProgramCache]: Analyzing trace with hash -569777611, now seen corresponding path program 138 times [2022-03-20 13:04:06,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:06,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422053781] [2022-03-20 13:04:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:06,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:07,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422053781] [2022-03-20 13:04:07,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422053781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:07,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566730489] [2022-03-20 13:04:07,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:07,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:07,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:07,787 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) [2022-03-20 13:04:07,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 13:04:08,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:04:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:04:08,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 13:04:08,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2022-03-20 13:04:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566730489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:08,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 7, 7] total 78 [2022-03-20 13:04:08,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:08,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845209560] [2022-03-20 13:04:08,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845209560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:08,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:08,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 13:04:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505743222] [2022-03-20 13:04:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:08,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 13:04:08,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:08,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 13:04:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2781, Invalid=3225, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:04:08,623 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) [2022-03-20 13:04:17,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:17,300 INFO L93 Difference]: Finished difference Result 516 states and 658 transitions. [2022-03-20 13:04:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 13:04:17,305 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 [2022-03-20 13:04:17,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:17,306 INFO L225 Difference]: With dead ends: 516 [2022-03-20 13:04:17,306 INFO L226 Difference]: Without dead ends: 499 [2022-03-20 13:04:17,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7957, Invalid=13505, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 13:04:17,307 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:17,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2136 Valid, 32 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:04:17,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-20 13:04:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 162. [2022-03-20 13:04:17,433 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) [2022-03-20 13:04:17,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2022-03-20 13:04:17,433 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2022-03-20 13:04:17,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:17,433 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2022-03-20 13:04:17,433 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) [2022-03-20 13:04:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2022-03-20 13:04:17,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 13:04:17,434 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:17,434 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:17,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 13:04:17,647 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 [2022-03-20 13:04:17,647 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 139 times [2022-03-20 13:04:17,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:17,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132861753] [2022-03-20 13:04:17,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:17,649 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:17,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1584578643, now seen corresponding path program 140 times [2022-03-20 13:04:17,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:17,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107043263] [2022-03-20 13:04:17,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:17,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:19,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:19,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107043263] [2022-03-20 13:04:19,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107043263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:19,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523176323] [2022-03-20 13:04:19,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:04:19,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:19,052 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) [2022-03-20 13:04:19,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 13:04:19,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:04:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 13:04:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:19,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4771 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:23,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523176323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:23,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:23,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 144 [2022-03-20 13:04:23,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:23,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132861753] [2022-03-20 13:04:23,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132861753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:23,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:23,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 13:04:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809539700] [2022-03-20 13:04:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:23,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 13:04:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 13:04:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 13:04:23,742 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) [2022-03-20 13:04:33,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:33,283 INFO L93 Difference]: Finished difference Result 523 states and 667 transitions. [2022-03-20 13:04:33,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 13:04:33,283 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 [2022-03-20 13:04:33,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:33,285 INFO L225 Difference]: With dead ends: 523 [2022-03-20 13:04:33,285 INFO L226 Difference]: Without dead ends: 506 [2022-03-20 13:04:33,286 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=20166, Invalid=25416, Unknown=0, NotChecked=0, Total=45582 [2022-03-20 13:04:33,286 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1645 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:33,287 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1645 Valid, 37 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:04:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-20 13:04:33,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 164. [2022-03-20 13:04:33,419 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) [2022-03-20 13:04:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-03-20 13:04:33,419 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2022-03-20 13:04:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:33,419 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-03-20 13:04:33,419 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) [2022-03-20 13:04:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-03-20 13:04:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 13:04:33,420 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:33,420 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:33,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-20 13:04:33,632 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 [2022-03-20 13:04:33,633 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:33,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:33,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 141 times [2022-03-20 13:04:33,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026610650] [2022-03-20 13:04:33,634 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:33,634 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:33,634 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1746702065, now seen corresponding path program 142 times [2022-03-20 13:04:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:33,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720254492] [2022-03-20 13:04:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:35,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:35,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720254492] [2022-03-20 13:04:35,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720254492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674371761] [2022-03-20 13:04:35,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:04:35,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:35,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:35,078 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) [2022-03-20 13:04:35,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 13:04:35,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:04:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-20 13:04:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:35,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4910 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:39,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674371761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:39,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:39,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 146 [2022-03-20 13:04:39,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:39,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026610650] [2022-03-20 13:04:39,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026610650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:39,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:39,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 13:04:39,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340311694] [2022-03-20 13:04:39,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:39,941 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 13:04:39,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 13:04:39,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 13:04:39,944 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) [2022-03-20 13:04:49,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:04:49,854 INFO L93 Difference]: Finished difference Result 530 states and 676 transitions. [2022-03-20 13:04:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 13:04:49,854 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 [2022-03-20 13:04:49,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:04:49,855 INFO L225 Difference]: With dead ends: 530 [2022-03-20 13:04:49,855 INFO L226 Difference]: Without dead ends: 513 [2022-03-20 13:04:49,857 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=20738, Invalid=26134, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 13:04:49,857 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2006 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:04:49,857 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 37 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:04:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-03-20 13:04:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 166. [2022-03-20 13:04:49,990 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) [2022-03-20 13:04:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-03-20 13:04:49,990 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 163 [2022-03-20 13:04:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:04:49,991 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-03-20 13:04:49,991 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) [2022-03-20 13:04:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-03-20 13:04:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 13:04:49,991 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:04:49,991 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:04:50,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 13:04:50,210 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 [2022-03-20 13:04:50,210 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:04:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:04:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 143 times [2022-03-20 13:04:50,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:50,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1432617236] [2022-03-20 13:04:50,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:04:50,212 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:04:50,212 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:04:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1366479345, now seen corresponding path program 144 times [2022-03-20 13:04:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:04:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206472305] [2022-03-20 13:04:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:04:50,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:04:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:51,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:04:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:04:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:04:51,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:04:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206472305] [2022-03-20 13:04:51,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206472305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:04:51,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289295045] [2022-03-20 13:04:51,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:04:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:04:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:04:51,701 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) [2022-03-20 13:04:51,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 13:04:52,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:04:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:04:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:04:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:04:52,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 13:04:52,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:04:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5051 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5041 trivial. 0 not checked. [2022-03-20 13:04:52,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289295045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:04:52,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:04:52,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 7, 7] total 81 [2022-03-20 13:04:52,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:04:52,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1432617236] [2022-03-20 13:04:52,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1432617236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:04:52,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:04:52,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 13:04:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574943628] [2022-03-20 13:04:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:04:52,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 13:04:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:04:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 13:04:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3009, Invalid=3471, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 13:04:52,574 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) [2022-03-20 13:05:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:02,464 INFO L93 Difference]: Finished difference Result 537 states and 685 transitions. [2022-03-20 13:05:02,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 13:05:02,476 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 [2022-03-20 13:05:02,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:02,477 INFO L225 Difference]: With dead ends: 537 [2022-03-20 13:05:02,477 INFO L226 Difference]: Without dead ends: 520 [2022-03-20 13:05:02,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 325 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8626, Invalid=14630, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 13:05:02,478 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:02,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 22 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:05:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-20 13:05:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 168. [2022-03-20 13:05:02,618 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) [2022-03-20 13:05:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2022-03-20 13:05:02,618 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 165 [2022-03-20 13:05:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:02,619 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2022-03-20 13:05:02,619 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) [2022-03-20 13:05:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2022-03-20 13:05:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 13:05:02,619 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:02,619 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:02,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:02,824 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 [2022-03-20 13:05:02,824 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:02,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 145 times [2022-03-20 13:05:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:02,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [790291710] [2022-03-20 13:05:02,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:02,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:02,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:02,826 INFO L85 PathProgramCache]: Analyzing trace with hash 458390957, now seen corresponding path program 146 times [2022-03-20 13:05:02,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:02,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774297184] [2022-03-20 13:05:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:02,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:04,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774297184] [2022-03-20 13:05:04,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774297184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:04,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220903380] [2022-03-20 13:05:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:04,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:04,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:04,360 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) [2022-03-20 13:05:04,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 13:05:04,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:04,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:04,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-20 13:05:04,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:05,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5194 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:09,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220903380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:09,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:09,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 75, 75] total 150 [2022-03-20 13:05:09,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [790291710] [2022-03-20 13:05:09,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [790291710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:09,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:09,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 13:05:09,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592172259] [2022-03-20 13:05:09,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:09,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 13:05:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 13:05:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 13:05:09,519 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) [2022-03-20 13:05:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:20,189 INFO L93 Difference]: Finished difference Result 544 states and 694 transitions. [2022-03-20 13:05:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 13:05:20,190 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 [2022-03-20 13:05:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:20,191 INFO L225 Difference]: With dead ends: 544 [2022-03-20 13:05:20,191 INFO L226 Difference]: Without dead ends: 527 [2022-03-20 13:05:20,193 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=21906, Invalid=27600, Unknown=0, NotChecked=0, Total=49506 [2022-03-20 13:05:20,193 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:20,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1875 Valid, 47 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:05:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-20 13:05:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 170. [2022-03-20 13:05:20,353 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) [2022-03-20 13:05:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-03-20 13:05:20,353 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 167 [2022-03-20 13:05:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:20,354 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-03-20 13:05:20,354 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) [2022-03-20 13:05:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-03-20 13:05:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 13:05:20,354 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:20,354 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:20,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-20 13:05:20,554 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 [2022-03-20 13:05:20,555 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:20,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 147 times [2022-03-20 13:05:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:20,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646822995] [2022-03-20 13:05:20,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:20,556 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:20,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1812094411, now seen corresponding path program 148 times [2022-03-20 13:05:20,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:20,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282210593] [2022-03-20 13:05:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:20,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:22,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:22,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282210593] [2022-03-20 13:05:22,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282210593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:22,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043855796] [2022-03-20 13:05:22,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:05:22,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:22,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:22,112 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) [2022-03-20 13:05:22,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 13:05:22,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:05:22,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:22,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 13:05:22,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:22,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5339 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:27,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043855796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:27,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:27,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 152 [2022-03-20 13:05:27,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646822995] [2022-03-20 13:05:27,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646822995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:27,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:27,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 13:05:27,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904941331] [2022-03-20 13:05:27,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:27,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 13:05:27,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:27,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 13:05:27,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 13:05:27,340 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) [2022-03-20 13:05:38,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:38,544 INFO L93 Difference]: Finished difference Result 551 states and 703 transitions. [2022-03-20 13:05:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 13:05:38,544 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 [2022-03-20 13:05:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:38,546 INFO L225 Difference]: With dead ends: 551 [2022-03-20 13:05:38,546 INFO L226 Difference]: Without dead ends: 534 [2022-03-20 13:05:38,547 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3138 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=22502, Invalid=28348, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 13:05:38,548 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, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:38,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1850 Valid, 42 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:05:38,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-03-20 13:05:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 172. [2022-03-20 13:05:38,697 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) [2022-03-20 13:05:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2022-03-20 13:05:38,698 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 169 [2022-03-20 13:05:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:38,698 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2022-03-20 13:05:38,698 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) [2022-03-20 13:05:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2022-03-20 13:05:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 13:05:38,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:38,699 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:38,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-20 13:05:38,899 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 [2022-03-20 13:05:38,899 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:38,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:38,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 149 times [2022-03-20 13:05:38,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:38,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166649321] [2022-03-20 13:05:38,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:38,900 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:38,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:38,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1346023017, now seen corresponding path program 150 times [2022-03-20 13:05:38,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:38,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97069659] [2022-03-20 13:05:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:38,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:40,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97069659] [2022-03-20 13:05:40,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97069659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:40,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370163169] [2022-03-20 13:05:40,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:05:40,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:40,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:40,497 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) [2022-03-20 13:05:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 13:05:40,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:05:40,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:05:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 13:05:41,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:05:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5486 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5476 trivial. 0 not checked. [2022-03-20 13:05:41,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370163169] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:05:41,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:05:41,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 7, 7] total 84 [2022-03-20 13:05:41,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:05:41,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166649321] [2022-03-20 13:05:41,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166649321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:05:41,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:05:41,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 13:05:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19029498] [2022-03-20 13:05:41,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:05:41,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 13:05:41,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 13:05:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3246, Invalid=3726, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:05:41,425 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) [2022-03-20 13:05:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:05:52,552 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-03-20 13:05:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 13:05:52,552 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 [2022-03-20 13:05:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:05:52,553 INFO L225 Difference]: With dead ends: 558 [2022-03-20 13:05:52,554 INFO L226 Difference]: Without dead ends: 541 [2022-03-20 13:05:52,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 337 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9322, Invalid=15800, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 13:05:52,555 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:05:52,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 42 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:05:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-03-20 13:05:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 174. [2022-03-20 13:05:52,705 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) [2022-03-20 13:05:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2022-03-20 13:05:52,705 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 171 [2022-03-20 13:05:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:05:52,705 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2022-03-20 13:05:52,705 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) [2022-03-20 13:05:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2022-03-20 13:05:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:05:52,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:05:52,706 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:05:52,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 13:05:52,919 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 [2022-03-20 13:05:52,919 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:05:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:05:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 151 times [2022-03-20 13:05:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:05:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504607629] [2022-03-20 13:05:52,921 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:05:52,921 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:05:52,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:05:52,921 INFO L85 PathProgramCache]: Analyzing trace with hash 128012167, now seen corresponding path program 152 times [2022-03-20 13:05:52,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:05:52,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393627806] [2022-03-20 13:05:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:05:52,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:05:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:54,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:05:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:05:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:54,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:05:54,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393627806] [2022-03-20 13:05:54,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393627806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:05:54,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136904517] [2022-03-20 13:05:54,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:05:54,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:05:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:05:54,558 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) [2022-03-20 13:05:54,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 13:05:55,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:05:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:05:55,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 13:05:55,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:05:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:05:55,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5635 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:00,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136904517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:00,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 156 [2022-03-20 13:06:00,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504607629] [2022-03-20 13:06:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504607629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:00,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 13:06:00,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669410393] [2022-03-20 13:06:00,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:00,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 13:06:00,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 13:06:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 13:06:00,091 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) [2022-03-20 13:06:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:12,669 INFO L93 Difference]: Finished difference Result 565 states and 721 transitions. [2022-03-20 13:06:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 13:06:12,670 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 [2022-03-20 13:06:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:12,671 INFO L225 Difference]: With dead ends: 565 [2022-03-20 13:06:12,671 INFO L226 Difference]: Without dead ends: 548 [2022-03-20 13:06:12,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=23718, Invalid=29874, Unknown=0, NotChecked=0, Total=53592 [2022-03-20 13:06:12,673 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2252 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:12,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2252 Valid, 47 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:06:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-20 13:06:12,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 176. [2022-03-20 13:06:12,837 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) [2022-03-20 13:06:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-03-20 13:06:12,837 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 173 [2022-03-20 13:06:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:12,837 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-03-20 13:06:12,837 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) [2022-03-20 13:06:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-03-20 13:06:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 13:06:12,838 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:12,838 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:12,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:13,051 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 [2022-03-20 13:06:13,051 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:13,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 153 times [2022-03-20 13:06:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113123466] [2022-03-20 13:06:13,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:13,053 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:13,053 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:13,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2145657125, now seen corresponding path program 154 times [2022-03-20 13:06:13,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:13,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041898306] [2022-03-20 13:06:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:13,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:14,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:14,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:14,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041898306] [2022-03-20 13:06:14,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041898306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:14,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886938771] [2022-03-20 13:06:14,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:06:14,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:14,845 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) [2022-03-20 13:06:14,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 13:06:15,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:06:15,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:15,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 771 conjuncts, 78 conjunts are in the unsatisfiable core [2022-03-20 13:06:15,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:15,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5786 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:20,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886938771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:20,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:20,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 158 [2022-03-20 13:06:20,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:20,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113123466] [2022-03-20 13:06:20,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113123466] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:20,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:20,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 13:06:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826142112] [2022-03-20 13:06:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:20,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 13:06:20,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:20,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 13:06:20,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 13:06:20,549 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) [2022-03-20 13:06:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:33,577 INFO L93 Difference]: Finished difference Result 572 states and 730 transitions. [2022-03-20 13:06:33,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 13:06:33,577 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 [2022-03-20 13:06:33,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:33,579 INFO L225 Difference]: With dead ends: 572 [2022-03-20 13:06:33,579 INFO L226 Difference]: Without dead ends: 555 [2022-03-20 13:06:33,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3381 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=24338, Invalid=30652, Unknown=0, NotChecked=0, Total=54990 [2022-03-20 13:06:33,581 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:33,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 32 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:06:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-20 13:06:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 178. [2022-03-20 13:06:33,745 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) [2022-03-20 13:06:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2022-03-20 13:06:33,746 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2022-03-20 13:06:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:33,746 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2022-03-20 13:06:33,746 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) [2022-03-20 13:06:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2022-03-20 13:06:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 13:06:33,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:33,747 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:33,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-20 13:06:33,947 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 [2022-03-20 13:06:33,947 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 155 times [2022-03-20 13:06:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [549112607] [2022-03-20 13:06:33,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:33,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:33,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -222756029, now seen corresponding path program 156 times [2022-03-20 13:06:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752615431] [2022-03-20 13:06:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752615431] [2022-03-20 13:06:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752615431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271218101] [2022-03-20 13:06:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:06:35,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:35,680 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) [2022-03-20 13:06:35,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 13:06:36,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:06:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:36,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:06:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 13:06:36,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5939 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2022-03-20 13:06:36,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271218101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:36,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:36,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 7, 7] total 87 [2022-03-20 13:06:36,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:36,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [549112607] [2022-03-20 13:06:36,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [549112607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:36,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:36,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 13:06:36,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448709718] [2022-03-20 13:06:36,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:36,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 13:06:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 13:06:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3492, Invalid=3990, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:06:36,673 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) [2022-03-20 13:06:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:06:49,531 INFO L93 Difference]: Finished difference Result 579 states and 739 transitions. [2022-03-20 13:06:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 13:06:49,531 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 [2022-03-20 13:06:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:06:49,533 INFO L225 Difference]: With dead ends: 579 [2022-03-20 13:06:49,533 INFO L226 Difference]: Without dead ends: 562 [2022-03-20 13:06:49,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3551 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10045, Invalid=17015, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 13:06:49,534 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2201 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:06:49,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2201 Valid, 42 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:06:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-03-20 13:06:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 180. [2022-03-20 13:06:49,703 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) [2022-03-20 13:06:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2022-03-20 13:06:49,703 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2022-03-20 13:06:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:06:49,704 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2022-03-20 13:06:49,704 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) [2022-03-20 13:06:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2022-03-20 13:06:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 13:06:49,704 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:06:49,704 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:06:49,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 13:06:49,905 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 [2022-03-20 13:06:49,905 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:06:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:06:49,905 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 157 times [2022-03-20 13:06:49,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:49,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041859487] [2022-03-20 13:06:49,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:06:49,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:06:49,906 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:06:49,906 INFO L85 PathProgramCache]: Analyzing trace with hash 64869857, now seen corresponding path program 158 times [2022-03-20 13:06:49,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:06:49,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939541465] [2022-03-20 13:06:49,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:06:49,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:06:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:06:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:06:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:51,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:06:51,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939541465] [2022-03-20 13:06:51,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939541465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:06:51,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507766479] [2022-03-20 13:06:51,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:06:51,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:06:51,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:06:51,670 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) [2022-03-20 13:06:51,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 13:06:52,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:06:52,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:06:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-20 13:06:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:06:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:52,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:06:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6094 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:06:57,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507766479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:06:57,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:06:57,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 81, 81] total 162 [2022-03-20 13:06:57,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:06:57,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041859487] [2022-03-20 13:06:57,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041859487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:06:57,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:06:57,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 13:06:57,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207994230] [2022-03-20 13:06:57,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:06:57,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 13:06:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:06:57,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 13:06:57,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 13:06:57,567 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) [2022-03-20 13:07:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:11,506 INFO L93 Difference]: Finished difference Result 586 states and 748 transitions. [2022-03-20 13:07:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 13:07:11,506 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 [2022-03-20 13:07:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:11,508 INFO L225 Difference]: With dead ends: 586 [2022-03-20 13:07:11,508 INFO L226 Difference]: Without dead ends: 569 [2022-03-20 13:07:11,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3548 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25602, Invalid=32238, Unknown=0, NotChecked=0, Total=57840 [2022-03-20 13:07:11,510 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 1828 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:11,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 52 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:07:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-20 13:07:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 182. [2022-03-20 13:07:11,680 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) [2022-03-20 13:07:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-03-20 13:07:11,680 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 179 [2022-03-20 13:07:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:11,681 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-03-20 13:07:11,681 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) [2022-03-20 13:07:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-03-20 13:07:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 13:07:11,681 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:11,681 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:11,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 13:07:11,881 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 [2022-03-20 13:07:11,882 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 159 times [2022-03-20 13:07:11,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:11,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [866789620] [2022-03-20 13:07:11,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:11,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:11,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1595439359, now seen corresponding path program 160 times [2022-03-20 13:07:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251330294] [2022-03-20 13:07:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:11,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:13,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:13,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251330294] [2022-03-20 13:07:13,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251330294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552818514] [2022-03-20 13:07:13,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:07:13,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:13,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:13,692 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) [2022-03-20 13:07:13,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 13:07:14,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:07:14,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 13:07:14,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:14,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6251 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:19,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552818514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:19,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:19,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82, 82] total 164 [2022-03-20 13:07:19,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:19,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [866789620] [2022-03-20 13:07:19,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [866789620] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:19,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:19,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 13:07:19,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325250321] [2022-03-20 13:07:19,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:19,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 13:07:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:19,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 13:07:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 13:07:19,776 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) [2022-03-20 13:07:34,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:34,273 INFO L93 Difference]: Finished difference Result 593 states and 757 transitions. [2022-03-20 13:07:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 13:07:34,273 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 [2022-03-20 13:07:34,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:34,274 INFO L225 Difference]: With dead ends: 593 [2022-03-20 13:07:34,275 INFO L226 Difference]: Without dead ends: 576 [2022-03-20 13:07:34,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3633 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=26246, Invalid=33046, Unknown=0, NotChecked=0, Total=59292 [2022-03-20 13:07:34,277 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:34,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2225 Valid, 32 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:07:34,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-03-20 13:07:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 184. [2022-03-20 13:07:34,453 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) [2022-03-20 13:07:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-03-20 13:07:34,453 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2022-03-20 13:07:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:34,454 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-03-20 13:07:34,454 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) [2022-03-20 13:07:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-03-20 13:07:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 13:07:34,454 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:34,454 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:34,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-20 13:07:34,655 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 [2022-03-20 13:07:34,655 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 161 times [2022-03-20 13:07:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:34,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2027678627] [2022-03-20 13:07:34,656 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:34,656 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:34,656 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash -701051747, now seen corresponding path program 162 times [2022-03-20 13:07:34,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914437755] [2022-03-20 13:07:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:34,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:36,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914437755] [2022-03-20 13:07:36,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914437755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:36,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705220201] [2022-03-20 13:07:36,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:07:36,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:36,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:36,513 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) [2022-03-20 13:07:36,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 13:07:37,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:07:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:07:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 13:07:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:07:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6410 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6400 trivial. 0 not checked. [2022-03-20 13:07:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705220201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:07:37,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:07:37,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 7, 7] total 90 [2022-03-20 13:07:37,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:07:37,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2027678627] [2022-03-20 13:07:37,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2027678627] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:07:37,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:07:37,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 13:07:37,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589191727] [2022-03-20 13:07:37,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:07:37,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 13:07:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:37,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 13:07:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3747, Invalid=4263, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:07:37,562 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) [2022-03-20 13:07:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:07:51,960 INFO L93 Difference]: Finished difference Result 600 states and 766 transitions. [2022-03-20 13:07:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 13:07:51,960 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 [2022-03-20 13:07:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:07:51,962 INFO L225 Difference]: With dead ends: 600 [2022-03-20 13:07:51,962 INFO L226 Difference]: Without dead ends: 583 [2022-03-20 13:07:51,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 361 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3809 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10795, Invalid=18275, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 13:07:51,963 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2066 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:07:51,963 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 57 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:07:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-20 13:07:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 186. [2022-03-20 13:07:52,145 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) [2022-03-20 13:07:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2022-03-20 13:07:52,146 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2022-03-20 13:07:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:07:52,146 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2022-03-20 13:07:52,146 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) [2022-03-20 13:07:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2022-03-20 13:07:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 13:07:52,147 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:07:52,147 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:07:52,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-20 13:07:52,365 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 [2022-03-20 13:07:52,366 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:07:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:07:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 163 times [2022-03-20 13:07:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:07:52,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1861992741] [2022-03-20 13:07:52,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:07:52,367 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:07:52,367 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:07:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -15814469, now seen corresponding path program 164 times [2022-03-20 13:07:52,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:07:52,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087395645] [2022-03-20 13:07:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:07:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:07:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:54,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:07:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:07:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:54,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:07:54,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087395645] [2022-03-20 13:07:54,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087395645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:07:54,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097322251] [2022-03-20 13:07:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:07:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:07:54,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:07:54,267 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) [2022-03-20 13:07:54,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 13:07:54,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:07:54,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:07:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 13:07:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:07:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:07:55,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6571 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:08:00,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097322251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:00,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:00,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 168 [2022-03-20 13:08:00,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1861992741] [2022-03-20 13:08:00,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1861992741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:00,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:00,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 13:08:00,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348094469] [2022-03-20 13:08:00,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:00,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 13:08:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 13:08:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 13:08:00,606 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) [2022-03-20 13:08:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:16,878 INFO L93 Difference]: Finished difference Result 607 states and 775 transitions. [2022-03-20 13:08:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 13:08:16,878 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 [2022-03-20 13:08:16,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:16,880 INFO L225 Difference]: With dead ends: 607 [2022-03-20 13:08:16,880 INFO L226 Difference]: Without dead ends: 590 [2022-03-20 13:08:16,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3806 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=27558, Invalid=34692, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 13:08:16,882 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 [2022-03-20 13:08:16,882 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] [2022-03-20 13:08:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-03-20 13:08:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 188. [2022-03-20 13:08:17,076 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) [2022-03-20 13:08:17,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-03-20 13:08:17,076 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 185 [2022-03-20 13:08:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:17,077 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-03-20 13:08:17,077 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) [2022-03-20 13:08:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-03-20 13:08:17,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 13:08:17,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:17,077 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:17,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-20 13:08:17,278 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 [2022-03-20 13:08:17,278 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:17,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 165 times [2022-03-20 13:08:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [640545041] [2022-03-20 13:08:17,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:08:17,279 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:08:17,279 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:08:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1367213401, now seen corresponding path program 166 times [2022-03-20 13:08:17,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:17,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100841270] [2022-03-20 13:08:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:17,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:08:19,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100841270] [2022-03-20 13:08:19,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100841270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:19,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675042204] [2022-03-20 13:08:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:08:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:19,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:19,229 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) [2022-03-20 13:08:19,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 13:08:19,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:08:19,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:19,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-20 13:08:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:08:20,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:08:25,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675042204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:25,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:25,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85, 85] total 170 [2022-03-20 13:08:25,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:25,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [640545041] [2022-03-20 13:08:25,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [640545041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:25,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:25,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 13:08:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993513650] [2022-03-20 13:08:25,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:25,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 13:08:25,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:25,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 13:08:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 13:08:25,755 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) [2022-03-20 13:08:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:08:42,899 INFO L93 Difference]: Finished difference Result 614 states and 784 transitions. [2022-03-20 13:08:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 13:08:42,899 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 [2022-03-20 13:08:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:08:42,901 INFO L225 Difference]: With dead ends: 614 [2022-03-20 13:08:42,901 INFO L226 Difference]: Without dead ends: 597 [2022-03-20 13:08:42,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=28226, Invalid=35530, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 13:08:42,903 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 [2022-03-20 13:08:42,904 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] [2022-03-20 13:08:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-20 13:08:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 190. [2022-03-20 13:08:43,106 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) [2022-03-20 13:08:43,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2022-03-20 13:08:43,107 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2022-03-20 13:08:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:08:43,107 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2022-03-20 13:08:43,107 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) [2022-03-20 13:08:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2022-03-20 13:08:43,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 13:08:43,107 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:08:43,108 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:08:43,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-20 13:08:43,323 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 [2022-03-20 13:08:43,324 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:08:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:08:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 167 times [2022-03-20 13:08:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:43,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1011578354] [2022-03-20 13:08:43,325 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:08:43,325 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:08:43,325 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:08:43,325 INFO L85 PathProgramCache]: Analyzing trace with hash -982865289, now seen corresponding path program 168 times [2022-03-20 13:08:43,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:08:43,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096112501] [2022-03-20 13:08:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:08:43,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:08:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:45,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:08:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:08:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:08:45,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:08:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096112501] [2022-03-20 13:08:45,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096112501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:08:45,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800011093] [2022-03-20 13:08:45,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:08:45,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:08:45,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:08:45,337 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) [2022-03-20 13:08:45,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 13:08:45,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:08:45,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:08:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:08:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:08:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 13:08:46,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:08:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6899 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6889 trivial. 0 not checked. [2022-03-20 13:08:46,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800011093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:08:46,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:08:46,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 7, 7] total 93 [2022-03-20 13:08:46,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:08:46,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1011578354] [2022-03-20 13:08:46,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1011578354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:08:46,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:08:46,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 13:08:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338768211] [2022-03-20 13:08:46,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:08:46,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 13:08:46,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:08:46,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 13:08:46,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4011, Invalid=4545, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 13:08:46,454 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) [2022-03-20 13:09:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:03,498 INFO L93 Difference]: Finished difference Result 621 states and 793 transitions. [2022-03-20 13:09:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 13:09:03,498 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 [2022-03-20 13:09:03,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:03,500 INFO L225 Difference]: With dead ends: 621 [2022-03-20 13:09:03,500 INFO L226 Difference]: Without dead ends: 604 [2022-03-20 13:09:03,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4076 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11572, Invalid=19580, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 13:09:03,501 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 [2022-03-20 13:09:03,501 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] [2022-03-20 13:09:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-20 13:09:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 192. [2022-03-20 13:09:03,716 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) [2022-03-20 13:09:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2022-03-20 13:09:03,716 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2022-03-20 13:09:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:03,716 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2022-03-20 13:09:03,716 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) [2022-03-20 13:09:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2022-03-20 13:09:03,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 13:09:03,717 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:03,717 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:03,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-20 13:09:03,917 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 [2022-03-20 13:09:03,918 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 169 times [2022-03-20 13:09:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:03,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [384694060] [2022-03-20 13:09:03,919 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:09:03,919 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:09:03,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:09:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -255688683, now seen corresponding path program 170 times [2022-03-20 13:09:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:03,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969511351] [2022-03-20 13:09:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:05,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:05,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969511351] [2022-03-20 13:09:05,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969511351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941688646] [2022-03-20 13:09:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:09:05,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:05,971 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) [2022-03-20 13:09:05,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 13:09:06,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:09:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:06,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-20 13:09:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:06,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7066 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:12,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941688646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:12,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:12,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87, 87] total 174 [2022-03-20 13:09:12,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:12,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [384694060] [2022-03-20 13:09:12,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [384694060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:12,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:12,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 13:09:12,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548317766] [2022-03-20 13:09:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:12,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 13:09:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:12,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 13:09:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 13:09:12,800 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) [2022-03-20 13:09:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:09:31,331 INFO L93 Difference]: Finished difference Result 628 states and 802 transitions. [2022-03-20 13:09:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 13:09:31,331 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 [2022-03-20 13:09:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:09:31,333 INFO L225 Difference]: With dead ends: 628 [2022-03-20 13:09:31,333 INFO L226 Difference]: Without dead ends: 611 [2022-03-20 13:09:31,335 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=29586, Invalid=37236, Unknown=0, NotChecked=0, Total=66822 [2022-03-20 13:09:31,335 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 [2022-03-20 13:09:31,336 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] [2022-03-20 13:09:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-20 13:09:31,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 194. [2022-03-20 13:09:31,550 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) [2022-03-20 13:09:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-03-20 13:09:31,551 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 191 [2022-03-20 13:09:31,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:09:31,551 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-03-20 13:09:31,551 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) [2022-03-20 13:09:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-03-20 13:09:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 13:09:31,551 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:09:31,552 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:09:31,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-20 13:09:31,752 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 [2022-03-20 13:09:31,752 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:09:31,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:09:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 171 times [2022-03-20 13:09:31,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:31,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1653606623] [2022-03-20 13:09:31,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:09:31,754 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:09:31,754 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:09:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1518639565, now seen corresponding path program 172 times [2022-03-20 13:09:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:09:31,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537401510] [2022-03-20 13:09:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:09:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:09:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:33,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:09:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:09:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:33,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:09:33,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537401510] [2022-03-20 13:09:33,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537401510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:09:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787436752] [2022-03-20 13:09:33,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:09:33,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:09:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:09:33,861 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) [2022-03-20 13:09:33,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 13:09:34,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:09:34,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:09:34,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 13:09:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:09:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:34,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:09:40,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7235 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:09:40,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787436752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:09:40,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:09:40,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 176 [2022-03-20 13:09:40,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:09:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1653606623] [2022-03-20 13:09:40,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1653606623] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:09:40,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:09:40,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 13:09:40,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311978753] [2022-03-20 13:09:40,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:09:40,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 13:09:40,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:09:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 13:09:40,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 13:09:40,838 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) [2022-03-20 13:10:00,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:00,155 INFO L93 Difference]: Finished difference Result 635 states and 811 transitions. [2022-03-20 13:10:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 13:10:00,155 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 [2022-03-20 13:10:00,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:00,157 INFO L225 Difference]: With dead ends: 635 [2022-03-20 13:10:00,157 INFO L226 Difference]: Without dead ends: 618 [2022-03-20 13:10:00,159 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=30278, Invalid=38104, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 13:10:00,159 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 [2022-03-20 13:10:00,159 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] [2022-03-20 13:10:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-20 13:10:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 196. [2022-03-20 13:10:00,382 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) [2022-03-20 13:10:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2022-03-20 13:10:00,382 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 193 [2022-03-20 13:10:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:00,383 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2022-03-20 13:10:00,383 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) [2022-03-20 13:10:00,383 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2022-03-20 13:10:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 13:10:00,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:00,383 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:00,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 13:10:00,584 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 [2022-03-20 13:10:00,584 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 173 times [2022-03-20 13:10:00,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:00,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554395586] [2022-03-20 13:10:00,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:10:00,585 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:10:00,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:10:00,585 INFO L85 PathProgramCache]: Analyzing trace with hash 261307601, now seen corresponding path program 174 times [2022-03-20 13:10:00,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:00,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214999537] [2022-03-20 13:10:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:00,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:02,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214999537] [2022-03-20 13:10:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214999537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:02,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051127768] [2022-03-20 13:10:02,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:10:02,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:02,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:02,717 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) [2022-03-20 13:10:02,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 13:10:03,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:10:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:10:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 13:10:03,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7406 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7396 trivial. 0 not checked. [2022-03-20 13:10:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051127768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:03,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:03,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 7, 7] total 96 [2022-03-20 13:10:03,846 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:03,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554395586] [2022-03-20 13:10:03,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554395586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:03,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:03,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 13:10:03,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712308585] [2022-03-20 13:10:03,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:03,847 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 13:10:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 13:10:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4284, Invalid=4836, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 13:10:03,848 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) [2022-03-20 13:10:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:23,006 INFO L93 Difference]: Finished difference Result 642 states and 820 transitions. [2022-03-20 13:10:23,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 13:10:23,006 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 [2022-03-20 13:10:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:23,008 INFO L225 Difference]: With dead ends: 642 [2022-03-20 13:10:23,008 INFO L226 Difference]: Without dead ends: 625 [2022-03-20 13:10:23,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 385 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4352 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12376, Invalid=20930, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 13:10:23,009 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, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:23,009 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2203 Valid, 37 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:10:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-20 13:10:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 198. [2022-03-20 13:10:23,235 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) [2022-03-20 13:10:23,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2022-03-20 13:10:23,236 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 195 [2022-03-20 13:10:23,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:23,236 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2022-03-20 13:10:23,236 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) [2022-03-20 13:10:23,236 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2022-03-20 13:10:23,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 13:10:23,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:23,237 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:23,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-20 13:10:23,437 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 [2022-03-20 13:10:23,437 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:23,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 175 times [2022-03-20 13:10:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:23,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209488483] [2022-03-20 13:10:23,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:10:23,439 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:10:23,439 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:10:23,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1393550319, now seen corresponding path program 176 times [2022-03-20 13:10:23,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752018169] [2022-03-20 13:10:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:25,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:25,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752018169] [2022-03-20 13:10:25,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752018169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906455956] [2022-03-20 13:10:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:10:25,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:25,620 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) [2022-03-20 13:10:25,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 13:10:26,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:10:26,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:26,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 13:10:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:26,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:10:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7579 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906455956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:10:32,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:10:32,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 90] total 180 [2022-03-20 13:10:32,862 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:10:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209488483] [2022-03-20 13:10:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209488483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:10:32,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:10:32,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 13:10:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483882879] [2022-03-20 13:10:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:10:32,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 13:10:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 13:10:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15933, Invalid=16287, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 13:10:32,866 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) [2022-03-20 13:10:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:10:53,605 INFO L93 Difference]: Finished difference Result 649 states and 829 transitions. [2022-03-20 13:10:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 13:10:53,605 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 197 [2022-03-20 13:10:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:10:53,606 INFO L225 Difference]: With dead ends: 649 [2022-03-20 13:10:53,606 INFO L226 Difference]: Without dead ends: 632 [2022-03-20 13:10:53,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 573 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4349 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=31686, Invalid=39870, Unknown=0, NotChecked=0, Total=71556 [2022-03-20 13:10:53,609 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2162 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:10:53,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2162 Valid, 42 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:10:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-20 13:10:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 200. [2022-03-20 13:10:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 195 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:10:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2022-03-20 13:10:53,839 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 197 [2022-03-20 13:10:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:10:53,839 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2022-03-20 13:10:53,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-03-20 13:10:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2022-03-20 13:10:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 13:10:53,840 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:10:53,840 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:10:53,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-20 13:10:54,040 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:54,041 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:10:54,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:10:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 177 times [2022-03-20 13:10:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:10:54,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582677095] [2022-03-20 13:10:54,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:10:54,042 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:10:54,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:10:54,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1442890867, now seen corresponding path program 178 times [2022-03-20 13:10:54,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:10:54,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295562390] [2022-03-20 13:10:54,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:10:54,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:10:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:56,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:10:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:10:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:10:56,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295562390] [2022-03-20 13:10:56,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295562390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:10:56,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007777154] [2022-03-20 13:10:56,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 13:10:56,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:10:56,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:10:56,252 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:10:56,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 13:10:56,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 13:10:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:10:56,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 13:10:56,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:10:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:10:57,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7754 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:11:03,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007777154] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:03,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:03,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91, 91] total 182 [2022-03-20 13:11:03,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:03,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582677095] [2022-03-20 13:11:03,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582677095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:03,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:03,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 13:11:03,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392234070] [2022-03-20 13:11:03,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:03,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 13:11:03,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 13:11:03,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16292, Invalid=16650, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 13:11:03,666 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:25,161 INFO L93 Difference]: Finished difference Result 656 states and 838 transitions. [2022-03-20 13:11:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 13:11:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 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 199 [2022-03-20 13:11:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:25,162 INFO L225 Difference]: With dead ends: 656 [2022-03-20 13:11:25,162 INFO L226 Difference]: Without dead ends: 639 [2022-03-20 13:11:25,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=32402, Invalid=40768, Unknown=0, NotChecked=0, Total=73170 [2022-03-20 13:11:25,165 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2391 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 625 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2391 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 625 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:25,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2391 Valid, 27 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [625 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:11:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-03-20 13:11:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 202. [2022-03-20 13:11:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 197 states have internal predecessors, (202), 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) [2022-03-20 13:11:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2022-03-20 13:11:25,411 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 199 [2022-03-20 13:11:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:25,411 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2022-03-20 13:11:25,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 91 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2022-03-20 13:11:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 13:11:25,412 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:25,412 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:25,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 13:11:25,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:25,613 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:25,613 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 179 times [2022-03-20 13:11:25,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:25,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311332874] [2022-03-20 13:11:25,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:11:25,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:11:25,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:11:25,614 INFO L85 PathProgramCache]: Analyzing trace with hash 41362347, now seen corresponding path program 180 times [2022-03-20 13:11:25,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:25,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158128940] [2022-03-20 13:11:25,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:25,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:27,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:11:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158128940] [2022-03-20 13:11:27,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158128940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321184893] [2022-03-20 13:11:27,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 13:11:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:27,855 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:11:27,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 13:11:28,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 13:11:28,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 13:11:28,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 13:11:28,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:11:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7931 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7921 trivial. 0 not checked. [2022-03-20 13:11:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321184893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:11:29,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:11:29,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 7, 7] total 99 [2022-03-20 13:11:29,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:11:29,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311332874] [2022-03-20 13:11:29,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311332874] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:11:29,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:11:29,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 13:11:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800499955] [2022-03-20 13:11:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:11:29,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 13:11:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 13:11:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4566, Invalid=5136, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:11:29,023 INFO L87 Difference]: Start difference. First operand 202 states and 206 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:11:50,361 INFO L93 Difference]: Finished difference Result 663 states and 847 transitions. [2022-03-20 13:11:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 13:11:50,362 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 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 201 [2022-03-20 13:11:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:11:50,363 INFO L225 Difference]: With dead ends: 663 [2022-03-20 13:11:50,363 INFO L226 Difference]: Without dead ends: 646 [2022-03-20 13:11:50,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 397 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4637 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13207, Invalid=22325, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 13:11:50,364 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 2683 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2683 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:11:50,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2683 Valid, 32 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:11:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-03-20 13:11:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 204. [2022-03-20 13:11:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 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) [2022-03-20 13:11:50,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-03-20 13:11:50,617 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 201 [2022-03-20 13:11:50,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:11:50,617 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-03-20 13:11:50,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:11:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-03-20 13:11:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 13:11:50,617 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:11:50,617 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:11:50,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-20 13:11:50,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:50,818 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:11:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:11:50,818 INFO L85 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 181 times [2022-03-20 13:11:50,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:11:50,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513199517] [2022-03-20 13:11:50,820 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 13:11:50,820 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-03-20 13:11:50,820 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-20 13:11:50,820 INFO L85 PathProgramCache]: Analyzing trace with hash 479558729, now seen corresponding path program 182 times [2022-03-20 13:11:50,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:11:50,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590038006] [2022-03-20 13:11:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:11:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:11:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:53,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:11:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:11:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:11:53,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:11:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590038006] [2022-03-20 13:11:53,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590038006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:11:53,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405727121] [2022-03-20 13:11:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 13:11:53,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:11:53,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:11:53,124 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:11:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 13:11:53,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 13:11:53,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 13:11:53,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-20 13:11:53,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:11:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:11:54,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:12:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8110 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 13:12:00,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405727121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:12:00,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:12:00,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 93, 93] total 186 [2022-03-20 13:12:00,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:12:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513199517] [2022-03-20 13:12:00,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513199517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:12:00,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:12:00,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 13:12:00,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991002865] [2022-03-20 13:12:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:12:00,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 13:12:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:12:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 13:12:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17022, Invalid=17388, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 13:12:00,768 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)